Re: [M100] model 200 dvi cable

[Mike Stein]

The original connector is an FRC2-PA40; these look similar, but I don't see any 
male versions listed:

http://www.ddknet.co.jp/English/products/print/Cable_to_Board/FRC5/FRC5_ENG.pdf
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Thursday, November 09, 2017 2:57 AM
  Subject: Re: [M100] model 200 dvi cable


  That doesn't fit. That's the only kind I can find so far too. Sometimes in 
black, but always the same shape.


  It does just barely fit in a 102, but it's not even close in a 200. Not a 
matter of shaving or wiggling etc.


  The one you pictured before has a minimal shroud that hugs the pins closer, 
which today I can only find in pcb solder form, not idc crimp on.


  I would love to find that today. Directions that say to seperate and solder 
40 individual wires, *in the correct order*, or assemble 2 connectors on a dumb 
little adapter pcb just to hold 2 connectors... blech.


  On Nov 8, 2017 11:53 PM, "Mike Stein" <mhs.st...@gmail.com> wrote:

Something like this?


https://www.ebay.ca/itm/5Pcs-2-54mm-0-1-Pitch-2x20-Pin-40-Pin-IDC-Male-Box-Header-Flat-Cable-Connector/182237978492?hash=item2a6e3adf7c:g:IVQAAOSw1QpZ9dl~

m

From: Brian White 
  To: m...@bitchin100.com 
  Sent: Wednesday, November 08, 2017 11:00 PM
  Subject: Re: [M100] model 200 dvi cable


  Found it. Thanks. So it looks like a part that once was off the shelf, 
but now is not common, but maybe still available with enough looking, or if you 
simply knew a magic part number. Thanks again for the pic for reference.


  -- 
  bkw


  > I sent a picture on Oct. 17.
  > Normal crimp-on male header plug with twisted wires.


  >> Does anyone have a picture of a real original dvi cable for model 200?
  >> Specifically, the plug that goes in the 200?
  >> ...
  >> ...what did they give customers originally?

Re: [M100] model 200 dvi cable

[Mike Stein]

Something like this?

https://www.ebay.ca/itm/5Pcs-2-54mm-0-1-Pitch-2x20-Pin-40-Pin-IDC-Male-Box-Header-Flat-Cable-Connector/182237978492?hash=item2a6e3adf7c:g:IVQAAOSw1QpZ9dl~

m

From: Brian White 
  To: m...@bitchin100.com 
  Sent: Wednesday, November 08, 2017 11:00 PM
  Subject: Re: [M100] model 200 dvi cable


  Found it. Thanks. So it looks like a part that once was off the shelf, but 
now is not common, but maybe still available with enough looking, or if you 
simply knew a magic part number. Thanks again for the pic for reference.


  -- 
  bkw


  > I sent a picture on Oct. 17.
  > Normal crimp-on male header plug with twisted wires.


  >> Does anyone have a picture of a real original dvi cable for model 200?
  >> Specifically, the plug that goes in the 200?
  >> ...
  >> ...what did they give customers originally?

Re: [M100] Any writers still using an M100?

[Mike Stein]

- Original Message - 
From: Mitch Parker 
To: m...@bitchin100.com 
Sent: Thursday, November 02, 2017 8:52 PM
Subject: Re: [M100] Any writers still using an M100?

> Hello,

> I do know Evan.  I've met him several times and can tell you several things:

> 1.  He is a journalist.  He does a lot of writing for TechRepublic these days 
> and has written for several other sites and magazines in the past.
--
He is and does; he's also a co-founder and director of the Vintage Computer 
Federation, an umbrella group for the Vintage Computer Forum and the VCF 
conferences, both valuable resources for the vintage computer community.

But as we see more and more these days, journalists can not always be relied 
upon to present unbiased or even necessarily accurate information...

He's also opinionated to the point of being rude and insulting. According to 
him, folks like Fred are "a bunch of old cranks, one or two of which call 
themselves writers and still use a Model 100"
--

> 2.  If there is anyone that can credibly make that statement, it would be 
> him.  
--
I think the people on this list who actually own and use one of the M100 class  
of computers are much better qualified to comment.
--

Doesn't change that the m100 does a lot and there may be a few people still 
using theirs.
--
"may be"?!? If you follow this list at all then you'd know that there are 
indeed quite a few people using theirs and prepared to invest time and/or money 
to make them even more useful while retaining the features that make them 
unique.

>From my reply to Evan: 
"How many modern computers have a full size regular keyboard in a tablet format 
with a display that's clearly legible in bright sunlight, instant on, cheap 
batteries that last for days and can be replaced in seconds, etc. ?"

m

>Mitch

---
On Thu, Nov 2, 2017 at 6:58 PM Fred Whitaker <rr...@hotmail.com> wrote:

The Model 100 keyboard is the quality that has kept me using mine. I do have 
other devices but I prefer it for my writing. It is still as usable as it 
always has been. With the addition of REX and Quattro it is even more usable 
that it was.

Fred Whitaker

From: Bill Loguidice
Sent: Thursday, November 2, 2017 6:36 PM
To: m...@bitchin100.com
Subject: Re: [M100] Any writers still using an M100?

I would imagine few use it for serious writing anymore. Modern laptops have 
pretty good battery life (10 hours+) and are pretty portable, as well as have 
all the modern conveniences and connectivity that you generally need these 
days. There are also plenty of distraction-free and purpose built 
apps/software, obviously. 

I reviewed one of the modern options, the Freewrite, earlier this year: 
http://armchairarcade.com/perspectives/2017/02/27/review-astrohaus-freewrite-smart-typewriter-distraction-free-writing-device/

It's effective, but pricey. The main advantage that it has over the M100 series 
is that you don't have to do anything special to make it work within modern 
workflows. In many ways, it's actually more limited than the M100 series, 
though, and is really just a smart typewriter (and that's all it really claims 
to be).

I've certainly entertained the idea of using one of my M100 series systems for 
my professional writing activities - or even some leisure stuff - but it would 
be more as a novelty these days than something that I feel would enhance my 
productivity (and maybe even the opposite). With that said, in many ways, there 
really is no true modern equivalent to what the M100 series can do. Considering 
all the ways we can work now, something like that is probably not needed, but 
it's still interesting to note.

-Bill



Bill Loguidice | About me and other ways to get in touch


On Thu, Nov 2, 2017 at 6:10 PM, John R. Hogerhuis <jho...@pobox.com> wrote:

On Thu, Nov 2, 2017 at 2:51 PM Mike Stein <mhs.st...@gmail.com> wrote:
I thought some of you might be amused by this reply to a post I made in a 
CCtalk mailing list thread discussing the best device for undistracted writing 
with a good keyboard, display and battery life:

FWIW, Evan is a well-known figure in the vintage computer community.

m

Well sounded like he was debunking a specific bit of old wrong news. 

Reality is people do write with it. Not sure in what numbers. Sports writer 
story... never heard of it. 

— John. 

Re: [M100] DVI cable

[Mike Stein]

At a fast glance through the sparse documentation available it doesn't look 
like any of those drives will do.

Again, there's some confusing terminology here; I don't think Epson's dual 
density is the same thing as double density and I think they're actually 
talking about track density. There are three (formatted) possibilities: 
1.2 MB 96 tracks per inch, 500kbps
740KB 96 tracks per inch, 250kbps
360KB 48 tracks per inch, 250kbps.

740KB (sometimes called quad density) was not very common and Epson probably 
means that their drive is only capable of two densities, 1.2MB HD and 360KB DD 
as used in PCs and clones.

The DVI disks are single-sided double density, with the same capacity as a 
single-sided DD PC diskette but arranged as 40 tracks of 18 256 byte sectors 
instead of 40 tracks of 9 512 byte sectors. The number and size of sectors is a 
function of the controller, so the DVI drive is the same as one side of a 
standard 360K DD drive as used in PCs and elsewhere.

To read a DD diskette in an HD drive you need to slow it down from 360 RPM to 
300 RPM (or adjust the transfer rate) and you have to take two 80 TPI steps for 
every 40 TPI step. It looks like an 'I' jumper on the Teac 505 should make 
300RPM available, and pin 2 would then enable it; unfortunately there's no 
indication that it (or any of these drives) are capable of double-stepping, 
leaving that up to the controller.

But I could be wrong...

m

- Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Saturday, October 28, 2017 4:09 PM
  Subject: Re: [M100] DVI cable




  On Oct 28, 2017 1:00 PM, "MikeS"  wrote:

What's the make/model of the HD drive? Might be trivial to configure it to 
read a DD diskette.


  Epson SD-680L
  Epson SD-600 combo
  Teac FD-505 combo
  And on the way in, Epson SD-521


  The SD-680L looks nice and configurable, although this pdf suggests it's not 
fully configurable, but maybe that just means it can't do *single* density?
  http://jope.fi/drives/40200A03.pdf


  Easy enough to try, so I will do that next.



Do you only have one system disk?


  Yeah just the one. Looks original. Factory label that says Model 100 Disk 
Operating System. Obviously I intended to make copies and only use the copies, 
if it worked at least once. Maybe it still will work in a different drive.


  Or I might possibly be able to use those disk images that Steven put up on 
club100 to make a new disk from scratch.


  One of my old servers might possibly have a floppy controller that would 
work. That would be a whole project of it's own, since everything probably has 
bad caps. Otherwise I'm hoping one of you gents would be willing to let me mail 
you a few blank disks and you run the backup util to make a couple copies?


  -- 
  bkw

Re: [M100] new project

[Mike Stein]

Hey, hey; an expanded XR4 for CP/M was my idea! ;-)

Yeah, it was great to finally meet Phil in person; really sorry that meeting up 
with you couldn't work out.

I think EXTRAM (and presumably also XR4) used RAMRST, at least in the M100; 
where is this Vnicad you speak of? If you mean Vb, I don't think it's available 
on the bus?

As I discussed with Phil I was actually working on an EXTRAM clone (although 
not specifically for CP/M) and exploring how XR4 did its bank switching; do you 
have any specifics?

m
  - Original Message - 
  From: Stephen Adolph 
  To: Model 100 Discussion 
  Sent: Wednesday, October 25, 2017 5:40 PM
  Subject: [M100] new project


  I met up with Phil Avery recently in person, which was a real hoot.  In the 
process I got a front row demo of a T102 running CPM.  Very cool!  Now, this 
T102 was special as it was equipped with a Remem - which provides very flexible 
flash/ram storage.  Specifically, 4MB of flash and 2MB of SRAM.


  What's important here, is that that big pile of SRAM makes for 2 very fast 
RAM disks for CPM.


  Phil and I discussed the challenge of how to make CPM more obtainable.   
Remem was cool, but never easy to install and awful to build.  Keeping the 
serial port free is also nice as it allows for the link to the outside world.


  So, where we landed was that an all-SRAM REX could make CPM more achievable, 
as it would provide not only ram in the critical -7FFF memory space, but 
also supply ramdisk via bank switching in/out of the optrom bank.


  Large SRAM chips (meaning 1MB or bigger) tend to be 3.3V IE they need to be 
buffered to use them in M100-land.


  Anyhow, long story short, I am awaiting 3 "REXCPM" board now, which look a 
lot like REX except with a 2MB SRAM chip, extra buffer chips, and 3 wires that 
need hookup to the M100.  Kinda like (exactly like) a mega-EXTRAM.  


  Back in the day, there was a product called EXTRAM that put RAM in the optrom 
socket - 32kB.  Then there was XR4, which was EXTRAM x 4 or 128kB in the optrom 
socket.  XR4 used the IO/M signal to allow PORT based bank selection.  Here, 
REX is instead listening for an unlock sequence on the address bus to enable 
bank selection.



  I think EXTRAM used 2 wires - Vnicad, /WR

  I think XR4 used 3 wires - Vnicad, IO/M and /WR.

  REXCPM plan is to use 3 wires - Vnicad, /WR and RAMRST.  


  RAMRST may or may not be needed.  That signal is intended to protect memory 
during power down.  Perhaps the developer of XR4 found an alternative way to 
protect the memory.  Anyhow if I can eliminate RAMRST I will.  Anyone have any 
thoughts on the subject?


  In practice this would install the same way as REX2-

  In M100 - 3 wires over to the system bus socket

  in T102 - 3 wires over to an adjacent RAM chip

  in NEC - 3 wires over to a memory module.



  Losing power would wipe the card..so that's a big difference from REX.


  Having said that, SRAM does have advantages, and in principle one could have 
many of the same REX features working on REXCPM - memory backup, option roms 
etc.


  anyhow, that's the update.


  Steve

Re: [M100] new project

[Mike Stein]

No soldering (or Vnicad) required; turns out that the M100 EXTRAM does indeed 
only use /WR and RAMRST with the XR4 also using /Y0 for the bank selection, all 
plugged into the bus. The 102 connected to an adjacent RAM chip instead, but no 
idea how they connected /Y0 on the 102.

m
  - Original Message - 
  From: John R. Hogerhuis 
  To: m...@bitchin100.com 
  Sent: Wednesday, October 25, 2017 10:39 PM
  Subject: Re: [M100] new project




  On Wed, Oct 25, 2017 at 6:10 PM Mike Stein <mhs.st...@gmail.com> wrote:



I think EXTRAM (and presumably also XR4) used RAMRST, at least in the M100; 
where is this Vnicad you speak of? If you mean Vb, I don't think it's available 
on the bus?



  If it was he wouldn’t need a wire soldered to get it :-)


  — John. 

Re: [M100] DVI cable

[Mike Stein]

I could have sworn we just discussed this very topic, complete with pictures 
including one of this very cable, i.e. a 40-pin IDE/PATA cable with a one-piece 
two-sided dual-row pin header inserted at one end (also used to convert the 
pinout of an M100 cable with a 'normal' DIP plug).

Apologies if the pictures weren't clear enough...

m
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Tuesday, October 24, 2017 10:13 AM
  Subject: Re: [M100] DVI cable


  Yeah that's what the home-made T102 cable that came with my dvi looked like. 
A regular ide cable with the middle connector still on, and a bunch of pins 
jammed into the connector on one end to make it male. 


  A proper pin header would make a pretty neat "no building" answer, except for 
not being keyed to force the right polarity.


  -- 
  bkw


  On Oct 24, 2017 9:27 AM, "Stephen Adolph" <twospru...@gmail.com> wrote:

for what it is worth, I seem to recall being able to use a standard IDE HDD 
cable, with a long pin header for T102 <--> DVI.  maybe I recall incorrectly 
though.



On Tue, Oct 24, 2017 at 9:07 AM, Brian White <bw.al...@gmail.com> wrote:



  My new cable is like you say on the right.


  


  For instance:


  * The Model 100 tech ref
  
http://www.classiccmp.org/cini/pdf/Tandy/Model%20100%20Tech%20Reference.pdf
  page 28
  (also the service manual
   
http://www.classiccmp.org/cini/pdf/Tandy/Model%20100%20Service%20Manual%20(Final).pdf
   page 35)


  Says AD0 is pin 3 on the 100


  * The DVI service manual
  
http://www.classiccmp.org/cini/pdf/Tandy/Disk%20Video%20Interface%20Service%20Manual.pdf
  page 70


  Says AD0 is pin 6 on the DVI


  


  Similarly, I've now built a T102 cable with the twists.
  
https://photos.google.com/share/AF1QipMkzQNqSYNaG6XGROBssfEmXJ5kj3-Kv-gOHMuqPQJdSUloL8ZpSs83D-tcocw8jA?key=ZzRJQnlPVXlsRVZJVGE1ZXlKdkpoYnlvTUh0NjhB


  * The T102 tech ref
  
http://www.classiccmp.org/cini/pdf/Tandy/Model%20102%20Tech%20Reference.pdf
  page 20


  Says AD0 is pin 5 on the 102


  And sure enough, this cable constructed this way, pin 5 on the T102 end 
goes to pin 6 on the DVI end.


  This cable visually matches up with the old ebay one too, which we can 
only assume was good.
  (I didn't buy this cabel, just downloaded the pics while the ad was still 
up)
  https://goo.gl/photos/Sm8xx3Ys2vJwpQYu7


  


  To me this corroborates the M100 cable, because it shows that both cables 
deliver the same signal to the same pin at the DVI end, and I think there is no 
argument about how to make a T102 cable, and this T102 cable also appears to 
agree with the tech references. Everything is consistent with everything else.


  This also reasserts my initial idea that they designed the DVI pinout 
specifically to accommodate the fact that the DIP connector connects 
pins-to-wires in a different pattern than than regular IDC connectors, 
specifically to allow a flat simple cable using a DIP connector like that, and 
why the T102 & 200 needs twists.


  I've now tried both my M100's and my T102, and none of them are booting 
my dvi, but by now, I actually think it's a problem with the dvi even though 
these cables are both new and unproven. The pinouts check out with the manuals, 
my new T102 cable also agrees visually with those pics from that old ebay item 
for a T102 cable. I got my dvi off ebay and never saw it actually work, nor did 
the seller claim it.


  -- 
  bkw




  On Tue, Oct 24, 2017 at 1:00 AM, Mike Stein <mhs.st...@gmail.com> wrote:

I must admit that I'm starting to get confused myself but unless I hear 
otherwise I'm going to stick with my original opinion (Oct 17) that the DIP pin 
1 should connect to the IDC header pin 1 which would connect DIP 29 to header 
24, not 23. Sounds like your cable connects DIP 1 to Header 2 etc.

 
 Correct ?Yours?
   DIP IDC DIP IDC
  1 1 1 2
  2 3 2 4
  3 5 3 6
  4 7 4 8
  5 9 5 10
  6 11 6 12
  7 13 7 14
  8 15 8 16
  9 17 9 18
  10 19 10 20
  11 21 11 22
  12 23 12 24
  13 25 13 26
  14 27 14 28
  15 29 15 30
  16 31 16 32
  17 33 17 34
  18 35 18 36
  19 37 19 38
  20 39 20 40
  21 40 21 39
  22 38 22 37
  23 36 23 35
  24 34 24 33
  25 32 25 31
  26 30 26 29
  27 28 27 27
  28 26 28 25
  29 24 29 23
  30 22 30 21
  31 20 31 19
  32 18 32 17
  33 16 33 15
  34 14 34 13
  35 12 35 11
  36 10 36 9
  37 8 37 7
  38 6 38 5
  39 4 39 3
  40 2 40 1

Re: [M100] M100 with TPDD1 on eBay

[Mike Stein]

Greg,

You shouldn't have to remove the original system ROM socket in the M100; if you 
solder the EPROM into the adapter without a socket the adapter should plug 
right in and clear the keyboard.

If you need to reprogram the EPROM after it's soldered into the adapter then 
you should be able to make a 'programming' adapter using another of the adapter 
boards but assembled 'in reverse', to convert the 'module' back to the standard 
27C256/512 pinout. As I said, I'd have to go back for the details because AFAIR 
you have to change/add one or two of the option jumpers and the details of 
those seem to have been lost.

Good idea to test any mods in VT before committing to an EPROM.

m

- Original Message - 
From: "Greg Swallow" 
To: 
Sent: Tuesday, May 08, 2018 12:36 PM
Subject: Re: [M100] M100 with TPDD1 on eBay


> 
> Do a dry fit and check clearance before you solder anything; if you're 
> thinking of using an IC socket for the EPROM on the adapter you may find that 
> that makes it just a tiny bit too tall and you actually have to solder the 
> EPROM directly on to the adapter.
> 
> There is provision for reprogramming the EPROM after it's installed if 
> necessary but I'd have to go back and look up the details.
> 
> m
> 
> That's what I was figuring too Mike. I know from changing out the Main ROM in 
> the M102 an IC socket leaves no room. I used two rows of SIP female headers 
> in the M102 to create a "socket." The M100 does have a bit more room and 
> maybe, if I remove the original IC socket replacing it with headers I make it 
> so I can at least remove the board without desoldering should I want to 
> reprogram or upgrade the EEPROM later. Dry fitting is definitely in the plan.
> 
> God Bless,
> 
> GregS <><
>

Re: [M100] Tandy Model 102 Portable

[Mike Stein]

Might be interesting to dump that ROM and investigate and/or archive it; are 
you set up for loading/saving to a PC etc. over the Serial port?

m
  - Original Message - 
  From: Jesse Huyett 
  To: m...@bitchin100.com 
  Sent: Wednesday, May 09, 2018 9:04 AM
  Subject: Re: [M100] Tandy Model 102 Portable


  Hello All,
  The "minus one issue I'll research before asking" in the initial posting set 
me back longer than expected. Still not working 100%, but I got far enough to 
test.


  Running "call 63012"  or "call 63013" brings up an Optical Data Systems Inc. 
Bar+ ROM Menu.
  So likely uses the bar code reader which didn't come with the setup.


  Regards


  On Sat, May 5, 2018 at 10:39 AM, Lee Kelley  wrote:

If the rom is the EME option rom and not just the rombo it will be for 
running the EME analog to digital data acquisition system.


On Sat, May 5, 2018 at 4:30 AM, Brian White  wrote:

  That EME adapter is one of the slickest things ever made for Model 
100/102/200. It is an adapter that lets you plug a standard 27C256 eprom into 
the non-standard rom socket. It was called a ROMBO.


  It solves two different problems at once.


  * The socket does not have normal sockets for normal chip legs. It has 
pins that press on the side, and the rom chip is normally supposed to have it's 
legs bent around a carrier like the J legs on a qfp chip. This adapter comes 
with a bock of plastic that fills up the space inside the chip legs to support 
them from behind, so that a normal 27C256 with straight legs can be stuffed 
into the socket and the socket legs can push on the outside of the chip legs 
without bending them. This means you can insert and remove a normal chip 
indefinite times, and still be able to put the rom into a reader to rewrite it, 
because you don't have to bend the chip legs around the carrier.


  * The socket is not a standard pinout. This thing converts the pinout 
from M100-M200 option rom pinout on the outside surface, to standard 27C256 
pinout on the inside surface.


  It means you can play with burning option roms with an ordinary dip28 
27c256, without needing to build one of these http://tandy.wiki/FigTronix


  Some more info:
  http://www.club100.org/library/librom.html



  http://tandy.wiki/EME_Systems



  -- 
  bkw


  On Sat, May 5, 2018, 3:55 AM Jesse Huyett  wrote:

Hello All,
Just picked up an Tandy Model 102 Portable for a decent price.
Working (minus one issue I'll research before asking), but first up is 
taking it apart to do some major cleaning.

Checking the expansion bay, I found the following: 
https://i.imgur.com/HrcZURb.jpg
Two HM6264LP-15 (one soldered, one socketed). I'm assuming the 2nd 
(socketed) is a RAM upgrade to 32K.
What I can't seem to find is information on the tan/ silver EME SYS in 
the option ROM socket. I thought possibly a 'bypass', but the system appears to 
work the same without it.

Super curious and any information is appreciated.

Regards,
Jesse






-- 

"I will never in my lifetime make a film that cannot be seen by the whole 
family"  Arther P. Jacobs

Re: [M100] Tandy Model 100 Portable with the DVI (Disk Video Interface)

[Mike Stein]

How is your M100 cable wired? You may be able to use it with the 102/200 cable 
with a little adapter.

m
  - Original Message - 
  From: Jesse Huyett 
  To: m...@bitchin100.com 
  Sent: Wednesday, May 09, 2018 8:44 AM
  Subject: Re: [M100] Tandy Model 100 Portable with the DVI (Disk Video 
Interface)


  Hello all,
  Finally got some time and was able to test using the cable my DVI came with 
and the M102 mentioned in the "Tandy Model 102 Portable" thread.
  The cable I made for the M100 isn't working, but remaking will be a project 
for another time.


  Big thanks to Brian for the disk. Great to see a successful bootup of the 
system.


  Regards




  On Sat, Apr 28, 2018 at 1:46 PM, Brian White  wrote:

I don't remember what exactly the floppy controller needs. Maybe it just 
needs to be able to do double density.

Steven Adolf has a a downloadable image of the later version disk that 
supports both 100/102 and 200.

http://www.club100.org/memfiles/index.php?=0==Steve%20Adolph/DVI%20boot%20disk%20files

​
You need Teledisk (and probably DOS or at least Windows XP or lower), and 
an old floppy controller and a 360k drive to write the image.​


There are some 1.2m drives that can mostly fake 360k, but even if they do 
double density signal strength and rpm and kbps and write compensation, and 
double-step the head to do 48 tpi, there is still the problem that the physical 
drive head is a 96 tpi drive head and writes thinner tracks, leaving whole full 
tracks untouched in between, which can be full of noise or old data that would 
screw up when a wider 48tpi drive head tries to read it. So really, a 1.2m 
drive & controller than can do 360k, is really only good fro reading the old 
disks in a new drive, not for writing and certainly not for formatting.



​I have a little info on a few drives I actually tested myself here:
​http://tandy.wiki/Disk/Video_Interface:_Drives

and the cable
http://tandy.wiki/Disk/Video_Interface:_Cable


I think we discussed it here recently and someone had some more definitive 
knowledge than this, but I can't find it right now.

-- 

bkw






On Apr 27, 2018 11:16 PM, "Jesse Huyett"  wrote:

  Hello Brian,
  Thank you for the response.


  > the right kind of drive but also the right kind of floppy controller
  I have been looking but been unable to find any info on this. If you have 
any pointers or documentation, I can try to make my own. Otherwise, ...


  > just send me an address and I'll mail you a disk.
  I can send you floppies, I can pay shipping (Paypal, Google Pay, check, 
... ), ... Let me know what I can do.
  I'll send a PM with my address.


  Thanks again and super appreciate the offer.


  Regards,
  Jesse








  On Fri, Apr 27, 2018 at 11:57 AM, Brian White  wrote:

It's possible to write a new floppy from a download IF you have not 
only the right kind of drive but also the right kind of floppy controller on a 
motherboard or isa card.


Otherwise just send me an address and I'll mail you a disk. I happen to 
have a dvi set up and working at the moment so it's not inconvenient.


-- 
bkw


On Apr 27, 2018 2:22 AM, "Jesse Huyett"  wrote:

  Hello All,
  I have a Tandy Model 100 Portable with the DVI (Disk Video Interface).
  I built a cable for it I haven't been able to test since I haven't 
found a way to create the boot disk.

  I found a download of the files at club100.org ( 
http://club100.org/memfiles/index.php?=0==Steve%20Adolph/DVI%20boot%20disk%20files
 ), but haven't been able to figure out how to create a boot disk from the 
images - I do have access to older computers with a 5 1/4" floppy drive.
  Also tried writing the disk image to an HxC figuring I can hook this 
into the DVI, but the HxCFloppyEmulator software doesn't recognize the image 
format.

  Ideally, I'm looking for a cable (in case I didn't make mine 
correctly) and a boot floppy.
  At minimum, wondering if anyone has experience creating a boot floppy 
or getting it to write to the HxCFloppyEmulator software.


  Regards

Re: [M100] M100 with TPDD1 on eBay

[Mike Stein]

- Original Message - 
From: "Greg Swallow" 
To: 
Sent: Monday, May 07, 2018 11:35 PM
Subject: Re: [M100] M100 with TPDD1 on eBay


> So I will have 4 early M100 up for sale some time. All with Mike's Main
> ROM Adapter and a 27C256 with the fixes. Will try and set them up as a
> socket, with machined female headers like I do when I change out the Main
> ROM in an M102.
> 
> God Bless,
> 
> GregS <><
-

Do a dry fit and check clearance before you solder anything; if you're thinking 
of using an IC socket for the EPROM on the adapter you may find that that makes 
it just a tiny bit too tall and you actually have to solder the EPROM directly 
on to the adapter.

There is provision for reprogramming the EPROM after it's installed if 
necessary but I'd have to go back and look up the details.

m

Re: [M100] Mike Stein's PCB vs SuperROM

[Mike Stein]

If you just want to update the 'old' system ROM to fix the Y2K issue, the math 
bug and/or any other custom mods (e.g. set TELCOM default to 19200bd RS232 
instead of the obsolete modem, etc.) then just use a 27C256; it won't interfere 
with REX or any option ROMs in any way.

If you want to add the function of a single option ROM (e.g. to integrate 
TS-DOS or SuperROM) then a 27C512 will let you do that at no extra cost or 
effort in either an 'old' or a 'new' M100; ISTR that there's a fair bit of 
unused space in the TS-DOS ROM so you might well be able to squeeze some extra 
functionality in there.

With the flying lead connected the upper half of the '512 will indeed occupy 
the Option ROM memory area and conflict with REX or anything else using that 
area; disconnecting the lead or connecting it to +5V should disable the Option 
upper half and be equivalent to using a 27C256, freeing up the Option ROM area 
for REX or any other option application.

And of course if you have the RAM version of REX then you don't need any ROM 
replacement.

Glad to see another user!

m


- Original Message - 
From: "Greg Swallow" 
To: 
Sent: Saturday, May 05, 2018 12:20 PM
Subject: [M100] Mike Stein's PCB vs SuperROM


> Confirming what I figure to be true.
> 
> Thanks to my eye sight can not cut my own PCB for 1st Gen M100 Y2K ROMs so 
> picked up a hand full of Mike Stein's from OSH Park. It is noted that, if the 
> PCB is fully assembled with a 27C512, it is not compatible with REXX. Am I am 
> correct in assuming that this would be true for any Option ROM? I have two 
> M100 with the SuperROM and, though I purchased Mike's PCB to Y2K 3 or 4 1st 
> Gen M100 I need to sell, I did purchase some extras. If true then I will put 
> one Stein PCB in my M102 loaded with a Y2K fix image and DVI DOS, TS-DOS too 
> if I can fit it all, and use the M102 on my DVI. I'm tired of rebuilding DVI 
> cables anyway.
> 
> Thanks,
> 
> GregS <><

Re: [M100] Mike Stein's PCB vs SuperROM

[Mike Stein]

I'll have to look for them; they're on a retired computer somewhere.

Can't find my notes right now, but from comparing different versions I think 
this is it:

Y2K:
5A53H: 31 > 32
5A56H: 39 > 30

Default Baud 19200, XON:
03C5H: 4D > 39
03C6H: 37 > 38
03C7H: 49 > 4E

ATN error:
33BFH: 56 > 57

Replace | with pi:
7921H: 00 > 02
7922H: 00 > 7E
7923H: 7D > 02
7924H: 00 > 3E
7925H: 00 > 42

No guarantees; recommend you test in VT first.

Anybody remember how to demonstrate the math bug?

m

- Original Message - 
From: "Greg Swallow" 
To: 
Sent: Saturday, May 05, 2018 5:11 PM
Subject: Re: [M100] Mike Stein's PCB vs SuperROM


> Thanks Mike. That's what I thought it would be, but appreciate your 
> confirmation. It did bring up one more question. Do you have any text/link 
> about the Math Bug and setting the TELCOM default. I have what I need for the 
> Y2K fix, but I am not sure if the ROM files I have include the other patches.
> 
> Thanks,
> 
> GregS <><

Re: [M100] BBSing with Model 200

[Mike Stein]

The buffer is indeed small, but not that small ;-) it's actually 64 bytes.

XON/XOFF handshaking is not strictly speaking a speed and buffer size issue; 
slowing it down does indeed work, but I think it's because at the lower speeds 
it's never necessary to send an XOFF.

When using 'normal' one-character-at-a-time serial communication such as 
directly between an M100 and another computer there is no problem running at 
full speed using XON/XOFF.

But when connected through USB, WiFi etc. it will be receiving 
multiple-character packets and AFAIK there is no way to tell the sender to stop 
part-way through a packet once it's been sent. 

The 'bridges' we used when we first got the M100 on the internet years ago 
allowed setting packet size; setting it to very low values let the M100 run at 
nearly full speed since the bridge looked after holding off the data until the 
M100 was ready.

At least that's my recollection...

m
  - Original Message - 
  From: Kurt McCullum 
  To: m100@lists.bitchin100.com 
  Sent: Thursday, June 07, 2018 9:58 PM
  Subject: Re: [M100] BBSing with Model 200


  John beat me to the reply. the 16byte buffer get overloaded before there is 
enough time to tell the wifi232 to stop sending. HTERM works wonders! I think 
it's the only way to have a terminal with that seed.

  I had to do quite a bit of software gymnastics to get mComm to handle 19200 
with TELCOM. But I check for XOFF after every 2 or three bytes sent so it slows 
the transmission rate down.


  Kurt


  On Thu, Jun 7, 2018, at 5:29 PM, John R. Hogerhuis wrote:



On Thu, Jun 7, 2018 at 4:01 PM Eric Nelson  wrote:

  With the M200, top speed I have tried is 2400 baud with no data loss. 
9600 showed significant loss.



  I usually use this modem with my Amiga 1200 and Apple IIgs at speeds up 
to 14400 with no issue. I probably could go higher, but haven't tried.













It’s the model 100 software that makes it not keep up. A combination of a 
small receive queue and display processing overhead.



If the wifi232 can do real rts/cts you can get to higher rates using HTERM. 
 Plus it handles utf-8 and some ansi escapes processing. 



— John. 

Re: [M100] Leads/Legs for Mike Stein System ROM PCB

[Mike Stein]

No problem; just kidding and a little surprised.

Hope it doesn't get lost after all that ;-)

m

- Original Message - 
From: "Greg Swallow" 
To: 
Sent: Monday, June 18, 2018 12:34 PM
Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB


> Not yet Mike. Wow, $8? That is far more than I would ask. You shouldn't have.
> 
> All I've gotten so far is the corrected order from the folks I bought the 
> tinned 20AWG wire from. I sent them a pic of the bare wire they sent and they 
> said, Keep it. So now I have 200ft of bare and 100ft tinned copper 20AWG 
> wire. Either will fit the PCB, but will also cause certain damage to the 
> socket on the motherboard.
> 
> It'll be around noon MT when I can check the mail and see if your package has 
> arrived. Do accept my thanks for such an expense. If you come to Arizona for 
> the winter, maybe I can get you an $8 discount at the Best Western down the 
> street in Gold Canyon.
> 
> GregS <><
> 
> - Original Message -
> From: "Mike Stein" 
> To: m...@bitchin100.com
> Sent: Sunday, June 17, 2018 2:25:58 PM
> Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB
> 
> Everybody still alive? Awfully quiet...
> 
> Did you get the envelope, Greg? If I'd known that it was going to cost $8.00 
> to send a $0.60 part I might have had second thoughts... ;-)
> 
> m

Re: [M100] Leads/Legs for Mike Stein System ROM PCB

[Mike Stein]

Everybody still alive? Awfully quiet...

Did you get the envelope, Greg? If I'd known that it was going to cost $8.00 to 
send a $0.60 part I might have had second thoughts... ;-)

m

- Original Message - 
From: "Mike Stein" 
To: 
Sent: Monday, June 11, 2018 3:57 PM
Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB


I have jars full of  bits of different diameter wire trimmed from leads of 
components used in volume manufacturing and I also thought of using them, but 
it just didn't work out; anything strong enough was usually too thick, 
especially when inserting into machined pin sockets.

Send me your address off-list and I'll mail you one to try out.

m

- Original Message - 
From: "Greg Swallow" 
To: 
Sent: Monday, June 11, 2018 3:26 PM
Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB


>I didn't think about what it would do to the socket. I guess I got too worried 
>about what the socket would do to the pins. Hmm, maybe I'll have to use the 
>bare copper and flatten it a bit. Else the items you you noted on eBay do look 
>like a darn good answer. Order the later for the pins. O'll try what I can 
>with wire while waiting for delivery from China.
> 
> Thanks,
> 
> GregS <><
> 
> - Original Message -
> From: "Mike Stein" 
> To: m...@bitchin100.com
> Sent: Monday, June 11, 2018 10:54:31 AM
> Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB
> 
> Hi,
> 
> Nice to see someone using those adapters; thanks!
> 
> Of course once you've installed one you'll never want to remove it again ;-), 
> but I'm always reluctant to plug anything into an IC socket that might deform 
> the socket (just in case).
> 
> DIP IC pins are .010" thick whereas 20 AWG wire is around .030"; not only is 
> that snug in the PCB holes but also a little thick for the socket.
> 
> I prefer to use something with .010" pins, intended for plugging into an IC 
> socket like this:
> 
> eBay# 172138163630
> 
> Or an even better deal (more pins for the money):
> 
> eBay# 17115136
> 
> It takes a few minutes during a lull watching baseball to pull the pins and 
> adds about $0.50 to the cost, but they are plated and well worth it IMO..
> 
> Insert the pins from the top (with one of those solderless breadboards 
> underneath to hold and align them), solder, and trim off the top part.

Re: [M100] Leads/Legs for Mike Stein System ROM PCB

[Mike Stein]

Don't know how the Chinese do it; 10 of them cost $6.00 ppd.

m

- Original Message - 
From: "John Gardner" 
To: 
Sent: Sunday, June 17, 2018 5:40 PM
Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB


> Good thing you were'nt in Oz...   "8)
> 
> ...
> 
> 
> On 6/17/18, Mike Stein  wrote:
>> Everybody still alive? Awfully quiet...
>>
>> Did you get the envelope, Greg? If I'd known that it was going to cost $8.00
>> to send a $0.60 part I might have had second thoughts... ;-)
>>
>> m
>>
>> - Original Message -
>> From: "Mike Stein" 
>> To: 
>> Sent: Monday, June 11, 2018 3:57 PM
>> Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB
>>
>>
>> I have jars full of  bits of different diameter wire trimmed from leads of
>> components used in volume manufacturing and I also thought of using them,
>> but it just didn't work out; anything strong enough was usually too thick,
>> especially when inserting into machined pin sockets.
>>
>> Send me your address off-list and I'll mail you one to try out.
>>
>> m
>>
>> - Original Message -
>> From: "Greg Swallow" 
>> To: 
>> Sent: Monday, June 11, 2018 3:26 PM
>> Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB
>>
>>
>>>I didn't think about what it would do to the socket. I guess I got too
>>> worried about what the socket would do to the pins. Hmm, maybe I'll have
>>> to use the bare copper and flatten it a bit. Else the items you you noted
>>> on eBay do look like a darn good answer. Order the later for the pins.
>>> O'll try what I can with wire while waiting for delivery from China.
>>>
>>> Thanks,
>>>
>>> GregS <><
>>>
>>> - Original Message -
>>> From: "Mike Stein" 
>>> To: m...@bitchin100.com
>>> Sent: Monday, June 11, 2018 10:54:31 AM
>>> Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB
>>>
>>> Hi,
>>>
>>> Nice to see someone using those adapters; thanks!
>>>
>>> Of course once you've installed one you'll never want to remove it again
>>> ;-), but I'm always reluctant to plug anything into an IC socket that
>>> might deform the socket (just in case).
>>>
>>> DIP IC pins are .010" thick whereas 20 AWG wire is around .030"; not only
>>> is that snug in the PCB holes but also a little thick for the socket.
>>>
>>> I prefer to use something with .010" pins, intended for plugging into an
>>> IC socket like this:
>>>
>>> eBay# 172138163630
>>>
>>> Or an even better deal (more pins for the money):
>>>
>>> eBay# 17115136
>>>
>>> It takes a few minutes during a lull watching baseball to pull the pins
>>> and adds about $0.50 to the cost, but they are plated and well worth it
>>> IMO..
>>>
>>> Insert the pins from the top (with one of those solderless breadboards
>>> underneath to hold and align them), solder, and trim off the top part.
>>

Re: [M100] Leads/Legs for Mike Stein System ROM PCB

[Mike Stein]

Hi,

Nice to see someone using those adapters; thanks!

Of course once you've installed one you'll never want to remove it again ;-), 
but I'm always reluctant to plug anything into an IC socket that might deform 
the socket (just in case).

DIP IC pins are .010" thick whereas 20 AWG wire is around .030"; not only is 
that snug in the PCB holes but also a little thick for the socket.

I prefer to use something with .010" pins, intended for plugging into an IC 
socket like this:

eBay# 172138163630

Or an even better deal (more pins for the money):

eBay# 17115136

It takes a few minutes during a lull watching baseball to pull the pins and 
adds about $0.50 to the cost, but they are plated and well worth it IMO..

Insert the pins from the top (with one of those solderless breadboards 
underneath to hold and align them), solder, and trim off the top part.



m

- Original Message - 
From: "Greg Swallow" 
To: 
Sent: Saturday, June 09, 2018 4:40 PM
Subject: [M100] Leads/Legs for Mike Stein System ROM PCB


> Howdy all,
> 
> Got a project of five (5) early M100 vs Y2K ROM on Mike Stein PCB issue. 
> Trying to make leads/legs for the PCB with 20AWG solid copper wire. I ordered 
> tinned wire and the seller sent me bare copper. The bare wire does get 
> through the holes, but it is snug. About what I expected. I was figuring 
> 20AWG as 22AWG may not be strong enough to handle the pressure when inserted. 
> It was my intention to use tinned in order protect the copper, but tinned 
> might be a bit too tight in the holes. I have some liquid tin to use, if it 
> is still good. Just thinking maybe I should leave the tip going to the PCB 
> bare and hope the solder will be enough.
> 
> God bless,
> 
> GregS <>< 

Re: [M100] Leads/Legs for Mike Stein System ROM PCB

[Mike Stein]

I have jars full of  bits of different diameter wire trimmed from leads of 
components used in volume manufacturing and I also thought of using them, but 
it just didn't work out; anything strong enough was usually too thick, 
especially when inserting into machined pin sockets.

Send me your address off-list and I'll mail you one to try out.

m

- Original Message - 
From: "Greg Swallow" 
To: 
Sent: Monday, June 11, 2018 3:26 PM
Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB


>I didn't think about what it would do to the socket. I guess I got too worried 
>about what the socket would do to the pins. Hmm, maybe I'll have to use the 
>bare copper and flatten it a bit. Else the items you you noted on eBay do look 
>like a darn good answer. Order the later for the pins. O'll try what I can 
>with wire while waiting for delivery from China.
> 
> Thanks,
> 
> GregS <><
> 
> - Original Message -
> From: "Mike Stein" 
> To: m...@bitchin100.com
> Sent: Monday, June 11, 2018 10:54:31 AM
> Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB
> 
> Hi,
> 
> Nice to see someone using those adapters; thanks!
> 
> Of course once you've installed one you'll never want to remove it again ;-), 
> but I'm always reluctant to plug anything into an IC socket that might deform 
> the socket (just in case).
> 
> DIP IC pins are .010" thick whereas 20 AWG wire is around .030"; not only is 
> that snug in the PCB holes but also a little thick for the socket.
> 
> I prefer to use something with .010" pins, intended for plugging into an IC 
> socket like this:
> 
> eBay# 172138163630
> 
> Or an even better deal (more pins for the money):
> 
> eBay# 17115136
> 
> It takes a few minutes during a lull watching baseball to pull the pins and 
> adds about $0.50 to the cost, but they are plated and well worth it IMO..
> 
> Insert the pins from the top (with one of those solderless breadboards 
> underneath to hold and align them), solder, and trim off the top part.

Re: [M100] Leads/Legs for Mike Stein System ROM PCB

[Mike Stein]

- Original Message - 
From: "Daryl Tester" 
To: 
Sent: Monday, June 18, 2018 7:43 PM
Subject: Re: [M100] Leads/Legs for Mike Stein System ROM PCB


> On Mon, 18 Jun 2018 19:13:51 -0400 (EDT), Greg Swallow wrote:
> 
>> At $8 did you get a tracking number?
> 
> In Australia, $8 would barely get you casual indifference.  :-)
> 
---
LOL!

Same here, apparently; you'd think that you'd get tracking for a small envelope 
for that money but alas, apparently not.

Greg, let's pursue this off list.

m

Re: [M100] TPDD Utility Disk

[Mike Stein]

In general it's not the drive but the controller that controls whether the 
format is FM or MFM. Many PC controllers can do both FM and/or MFM no problem; 
in fact, some formats use both on the same disk.

I don't see any fundamental reason why you couldn't read/write a TPDD disk on a 
'standard' PC drive but I don't have a drive or disks to try.

m
  - Original Message - 
  From: Stephen Adolph 
  To: m...@bitchin100.com 
  Sent: Tuesday, May 29, 2018 7:28 PM
  Subject: Re: [M100] TPDD Utility Disk


  Only an fm drive can make a tppd disc.  Mfm can't
   Do It. 


   https://en.m.wikipedia.org/wiki/Modified_Frequency_Modulation




  Translation...a standard 3.5 drive can't work.  But the idea of a program to 
make a boot disc is possible provided you have a good Tpdd. 





  On Tuesday, May 29, 2018, Kevin Becker  wrote:

Unless the pictures on eBay are wrong, mine is definitely a TPDD. 





On May 29, 2018, at 7:01 PM, Brian White  wrote:


  If what you have is a TPDD-2 and not a TPDD, I can supply a copy for 
TPDD-2. Send me an address off-list and I'll mail it tomorrow.



  Conversely I would like a copy for TPDD myself if anyone is willing to 
either make me one, or trust me with mailing me theirs and I'll mail it back 
after making a copy myself.


  From what I've been able to tell, although people have tried and failed 
for 30 years, it actually *should* be physically possible to generate a new 
disk purely from a download, as long as you have a real drive and a working 
special cable. After all, the included floppy dos + backup.ba does it, and the 
drive is controlled entirely by mere serial communication which anything can do.


  A little progress has been made recently wrt recording the entire serial 
conversation during a backup, but it still has not yet gone all the way to 
being able to generate a disk from scratch from a download.
  I think the tools are there to at least work on it and eventually get 
there. So if you want an interesting project that hasn't already been solve at 
least 7 different times over the decades, yet looks within reach, there it is. 
:)


  You absolutely need a working TPDD or TPDD-2 drive to make these though, 
even if you use a modern pc to control it. It's not just a matter of an odd 
number of tracks or sectors or other formatting. The raw magnetic format is FM 
instead of MFM which all pc drives & drive controllers use. No amount of 
special software can overcome that!





  On Tue, May 29, 2018 at 4:58 PM, Kevin Becker  
wrote:

A little deeper googling is leading me to believe there is a special 
floppy_sys file on the utility disk that nobody has figured out how to 
recreate.  I'll try it anyway when it arrives but If that ends up being the 
case, then I wonder if there is anyone on the list who would be willing to make 
my a utility disk.  I'd be happy to send a blank disk and a self-addressed 
stamped envelope.  






On Tue, May 29, 2018 at 4:38 PM, Tom Dison  wrote:

  Ah that's a good question, is like to know also. 


  On Tue, May 29, 2018 at 3:29 PM Kevin Becker  
wrote:

I don’t mean with a PC. I should already be able to use the drive 
via TS-DOS so I’m assuming I can just copy floppy.co to my M102 using desklink 
and then save it to the TPDD. I’m just wondering if that is good enough or if 
there is some special boot sector magic necessary. 

On May 29, 2018, at 3:55 PM, Tom Dison  wrote:


  I don't believe you can create one with a PC floppy controller. 
I'd buy a copy off of someone is I could. For now, I'm planning on using the 
python library on Linux box connected to the drive to create the disk. I'd much 
rather just have the floppy.


  On Tue, May 29, 2018 at 2:31 PM Kevin Becker 
 wrote:

I've been watching eBay on and off for a TPDD or TPDD2 complete 
with cable at a reasonable price for what feels like forever.  I finally pulled 
the trigger on one today but doesn't include the utility diskette.   


I already have a REX with TS-DOS and I know how to bootstrap 
TEENY if necessary, but I'd like to have a utility disk with floppy.co just for 
the fun of it.  I believe I found floppy.co in an archive on the Club100 site.  
Is there anything special about the utility disk or can I just save floppy.co 
to any formatted disk and then be able to use it to bootstrap floppy.co later?
  -- 

  Faith without Works is Dead...

  -- 

  Faith without Works is Dead...






  -- 

  bkw

Re: [M100] nn - getting back involved.

[Mike Stein]

What are you looking at?

> For the OPTION rom:
In M100 and T102, pin 23 is NC.
In T200, pin 23 is connected to ALE

On the schematics pins 23 of the option ROM sockets of both the M100 and the 
T102 are labelled ALE (and in fact are connected to ALE), as is pin 23 of the 
'old' M100 main ROM.

Since they're all intended for the same type of chip why would they not all be 
connected the same way?

> Pin 27 of the optrom socket is labelled /CE while pin 27 of the main rom is 
> labelled /CS,

Pin 27 is labelled /CS on both the main and option ROM sockets, and is the only 
pin that is not connected in parallel to both sockets.

As you say, a modern replacement (which normally only has one chip 
select/enable) can probably ignore pin 23.

The lower address lines are already latched, so the purpose of the ALE 
connection isn't obvious; perhaps the original ROMs had some critical timing 
requirement that needed ALE even though the addresses were already latched.

Maybe Steve has an idea?
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Friday, June 29, 2018 2:18 AM
  Subject: Re: [M100] nn - getting back involved.


  Also to add to the confusion (are /CE and /CS synonymous? Are they maybe even 
tied together in the original main rom package or on the M100 motherboard?)


  Pin 27 of the optrom socket is labelled /CE while pin 27 of the main rom is 
labelled /CS, and it's not obvious that it's just a synonym for /CE, because 
there is another pin actually labelled /CE on the same socket, and, the two 
sockets are documented in the same manual, so it's not just a difference of 
convention between one author and another. The same authors labelled pin 27 two 
different ways in the two different sockets in the same documet. It could still 
just be a meaningless cosmetic blemish and the pins all mean the same thing, 
it's not an automatic assumption just from these docs. It needs to be 
determined.




  On Fri, Jun 29, 2018 at 2:02 AM Brian White  wrote:

Maybe none that matters, but,

I have these notes about the option rom socket:

https://drive.google.com/open?id=1ktI-KbRSu9drAOxGeEwzE2eil3YPtd_a6uABg_X1maA



And Bitchin100 has this about the main rom:
http://bitchin100.com/wiki/index.php?title=Model_100_ROM


And the only potential discrepency is pin 23.



For the MAIN rom:
In the early M100s, it's labelled /CE, but that is confusing because there 
is already a /CS on pin 27, and I thought they were just different possible 
names for the same thing. But sure enough it's written that way in the manual 
too:

http://ftp.whtech.com/club100/doc/m100ServiceManual.pdf#page=125


For the OPTION rom:
In M100 and T102, pin 23 is NC.
In T200, pin 23 is connected to ALE, but you can ignore it if you're making 
a rom adapter and leave that pin disconnected in the adapter.


If you were making an adapter, or simply writing a cheat sheet document for 
mapping the pins, that was supposed to work in both the main and option rom 
locations, I'm not sure if there is any single mapping that is ok in all cases 
(all models option rom sockets and old M100 main rom socket), even though in 
most cases it *looks* like you just ignore it and leave it unconnected when 
you're talking about putting a new part into the old socket.



-- 

bkw



On Thu, Jun 28, 2018 at 3:11 PM Mike Stein  wrote:

  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Wednesday, June 27, 2018 2:59 PM
  Subject: Re: [M100] nn - getting back involved.

  ...
  > Also, the rearranged pinout for Model 100 main rom is different from 
the rearranged pinout for the option rom!
  ...

  Interesting; what is different?

  m




-- 

bkw



  -- 

  bkw

Re: [M100] nn - getting back involved.

[Mike Stein]

- Original Message - 
From: "Nickolas Nolan" 
To: ; 
Sent: Wednesday, June 27, 2018 11:35 AM
Subject: Re: [M100] nn - getting back involved.
...
> The reference I have for the model 102 is here http://tandy.wiki/FigTronix
> again, I'm not sure how much of that documentation is correct, and I will try 
> to look at a few more units from my trunk this weekend. I've been meaning to 
> attempt a dump of my SuperRom in my 102.



For replacing the non-standard System ROM in an older (pre-12/83) M100 you 
might want to also look at this adapter:
https://www.oshpark.com/shared_projects/Kil9S1ya

Unlike the FigTronix this one does not require desoldering the socket or any 
modifications to the M100, uses a standard DIP 27C256 EPROM, and it is 
reprogrammable.

As a bonus you can optionally combine an option ROM image with the system ROM 
using a 27C512 instead of the '256; this precludes using the option ROM socket 
for an additional 'normal' option ROM or indeed anything that normally plugs 
into the option ROM socket such as the REX etc., although you could install a 
switch to disable it.

m

Re: [M100] SPAM-LOW: Re: New member - question on 'half' alive Model 100

[Mike Stein]

There will be minor differences, e.g. Y2K, the copyright message etc.

m

- Original Message - 
From: "Jeffrey Birt" 
To: 
Sent: Monday, April 30, 2018 3:57 PM
Subject: Re: [M100] SPAM-LOW: Re: New member - question on 'half' alive Model 
100


Thanks, I was able to download the emulator and locate the ROM bin files. I'll 
read in my ROM this evening and see how they compare.

Thanks,
Jeff

-Original Message-
From: M100  On Behalf Of Daryl Tester
Sent: Sunday, April 29, 2018 6:35 PM
To: m100@lists.bitchin100.com
Subject: Re: [M100] SPAM-LOW: Re: New member - question on 'half' alive Model 
100

 Hi Jeff.

 On Sun, 29 Apr 2018 16:11:08 -0500, Jeffrey Birt wrote:

> I replaced C90 and have the same symptoms. I'll now dig out my eprom 
> programmer and read in the main ROM. I still need a known good rom 
> dump to compare to. Anyone have one of those?

 I thought the Bitchin' Wiki or the Club web-site would have had dumps,  but  a 
quick look (admittedly *very* quick) didn't find anything.  However,  I 
remember that the Model 100/102/200 emulator "Virtual T" has the ROMs  as 
separate files, so you could download a copy and use those -

 https://sourceforge.net/projects/virtualt/

 And a thought on your diagnosing (again, only quickly caught up with  emails  
and definitely pre-coffee), but before you replace the CPU you may want  to 
check that the address latching is working correctly, given if the  
multiplexing screws up that's going to cause all sorts of weird  behaviours.

 Best of luck!

 Cheers.

--
 Regards,
   Daryl Tester
   Handcrafted Computers Pty. Ltd.

Re: [M100] DVI cable

[Mike Stein]

Nice write-up except for the obviously still incorrect first part.

I really don't get why this is such an issue; the correct cable connects pin 1 
at one end to pin 1 at the other end, end of story. Connecting pin 1 to pin 2 
as you want to do will not work as I've pointed out several times; why would 
you assume the DVI is at fault when your cable is wrong?

Fortunately the 5V and ground connections are swappable so you probably won't 
cause any damage.

Unfortunately a 24DIP plug that connects pin 1 to wire #1 seems to be pretty 
rare, and you may have to swap the pins, either the way described in the link 
below or with a little adapter cable described later in the blog; thanks for 
attributing the picture BTW.

What's odd is that there seem to be all sorts of 28-pin IDC plugs that have the 
correct configuration, i.e. pin 1 connects to the first wire; why not the 
40-pin versions...

I'm glad that someone else seems to have at last almost convinced you, since my 
words and pictures were falling on deaf ears... ;-)

BTW, my pictures were of the original cables that came with my DVI when I 
bought it brand new, plus an extra long one that I made myself.

Too bad you scrapped your cable; as I pointed out you could have used your T102 
cable to correct the pinout.

PIN 1 to PIN 1 ! Simple as that.

m

  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Thursday, October 26, 2017 5:00 PM
  Subject: Re: [M100] DVI cable


  Something somewhere fails to handle those trailing dots in that url, so let's 
remove them...

  http://tandy.wiki/Disk/Video_Interface#Work_in_progress


  -- 
  bkw


  On Oct 26, 2017 4:48 PM, "Brian White"  wrote:

I just recieved this new info from a member on the facebook group.

http://tandy.wiki/Disk/Video_Interface#Work_in_progress...

This cable looks home-made too, but he claims he knows it works and has 
used it himself.

Since he not only used the numbers but also a clear picture and description 
of plain physical location, there is no ambiguity about it.

Randy: THIS would seem to be the answer to your question finally. You can 
duplicate this guys cable using the same parts I linked to on that same wiki 
page. But ignore my tentative directions and pictures and go by Ted Saari's. 
(I'll update my directions and pics when I have actually verified it for 
myself, until then I'll just leave the "not yet verified, see below" note on 
mine. But it looks like this is what it's going to end up being.)


It flies in the face of what I said so far! :) His cable has twists in it, 
so that tells me that his DIP connector is pinned the same as mine, because I 
will have to make twists like that too, in order to get the pinout he describes.

The first cable I made was actually like that, and didn't boot either, but 
I convinced myself it was because the twists were wrong and I cut the end off 
that cable and scrapped it. So, I predict I still won't get my DVI working even 
after I duplicate this supposedly known-good example.

I have another DVI on the way in, so maybe that one will work.

Glad I ordered 10 dip connectors instead of 1!


-- 
bkw

Re: [M100] DVI cable

[Mike Stein]

> That sounds more like a disk drive or disk problem. 

Indeed, assuming that he's following the correct boot sequence.

BTW, I have a couple of copies of the single sheet addendum to the DVI 
instructions:
"Notice to Users of Radio Shack's DISK/VIDEO INTERFACE"

It  lists the M100 and T200 files on the system diskette and adds the T200 Kill 
and Restart BASIC commands; is it on line somewhere or should I scan it?

m
  - Original Message - 
  From: John R. Hogerhuis 
  To: m...@bitchin100.com 
  Sent: Friday, October 27, 2017 12:31 AM
  Subject: Re: [M100] DVI cable


  That sounds more like a disk drive or disk problem. 


  I assume that is farther than it gets without any cable connected at all?


  — John. 

Re: [M100] DVI cable

[Mike Stein]

> Is the pinout in one or the other tech reference actually completely 
> backwards? And no one has made loud note of that?

Yes.

>From my post, and previous posts on the same issue:
"The confusion stems from the fact that ... looking into the pin side male and 
female connectors are reversed..."
but
..."the DVI male pins are numbered the same as a female socket."

Not LOUD enough? ;-)

That's why I said "The bottom line is that regardless of numbering the M100 
cable has to connect pin 1 of the DIP plug to pin 1 of the 2x20 pin header".

ICs and DIP plug pin numbers are pretty well standard and dual-row headers 
usually have an arrow and a key denoting pin 1 so I thought that would be 
concise enough without going into the confusing details of the relative pin 
numbers. But if you insist:

FWIW the T102 and 200 BUS connector pinout also does not follow 'normal' usage 
for a female connector; compare the illustration on page B-2 (PDF p.64) in the 
T200 manual to this:



This pinout is generally accepted as the 'standard' and the connectors 
generally have an arrow beside pin 1, but not always:

https://electronics.stackexchange.com/questions/106426/standard-nomenclature-for-2-row-connector-numbering-schemes

The T102/200 cable is a good example because both ends are the same type of 
connector: Forget about pin numbers and male vs. female; your example of the 
/WR signal is on the DVI's 12th pin from the right opposite the key; on the 
T102 & T200 it is on the 12th pin from the left on the side with the key, which 
is why it has to be swapped. Which one is right and which one is wrong?

> "I consider myself to know nothing until I actually see it work in my own 
> hands, or at least see someone else's equally incontestable proof showing it 
> working?"

Well, I thought that the label on the picture "Original M100 cable; note pin 1 
connected to wire #1" would strongly suggest that this was the cable originally 
supplied with the DVI and you could probably take for granted that it does 
indeed work. And why would I post a picture of a cable using the other type of 
DIP plug and the required adapter if it didn't work?

Did you really need a picture of the DVI connected, reading a disk and 
displaying some text to be convinced?

I was admittedly a little miffed that after my (too?) lengthy explanations of 
why your original suggestion would probably not work and I took the trouble of 
digging out my DVI cables and even opening the DIP connectors to show the 
difference between the original and a homemade version you apparently ignored 
it all and when your cable predictably didn't work you assumed that it must be 
the DVI and not your cable. 

Why did I bother?

BTW, the reason for the 'probably' was that I couldn't tell for certain from 
the pictures that the connectors you linked to were the wrong type for a 
straight-through cable, but they sure looked like it.

OK; you're from Missouri and my explanations could have been clearer, but hey, 
as long as folks can get through the confusing posts and issues and know how to 
make a correct cable, all's well (but you should really correct the Wiki.. ;-)

m
-
- Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Thursday, October 26, 2017 9:11 PM
  Subject: Re: [M100] DVI cable






  On Oct 26, 2017 7:48 PM, "Mike Stein" <mhs.st...@gmail.com> wrote:

Nice write-up except for the obviously still incorrect first part.

I really don't get why this is such an issue; the correct cable connects 
pin 1 at one end to pin 1 at the other end, end of story.

  How is it so simple when you have never seen an official/original cable, or 
even a known-good home-made one, nor even have a known-good DVI to ensure that 
the cable is the only variable in the system?

  I was about to say you didn't post anything as definitive or explicit as you 
suggest now, but I just re-read you first post in this thread and I have to 
admit you did describe a simple rule to follow, and you didn't say it as "I 
thought it was...", you declared it.


  Mostly I guess it's just that no one had said anything at all on the topic 
(recently, in response to Randy's question I mean) at the time I decided to 
start figuring out the answer from first principles, and had already started 
gathering clues and references and deductions by the time you said that, so to 
me it somehow didn't register as being any firmer than just another possible 
idea that might be right, but still needs to be verified. You didn't actually 
say something like "Here is my actual cable which I actually used last month, 
and here is it's pinout."

  On top of that, before making the straight-through cable, I actually made one 
with the twists, and it didn't boot.

  On top of that, do the tech references not say what I say they say? AD0 is on 
pin 3 on the M100 c

Re: [M100] DVI cable

[Mike Stein]

Just watch out for those non-standard or mislabeled interface pins ;-)
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Friday, October 27, 2017 12:21 AM
  Subject: Re: [M100] DVI cable


  Well now I've added the twists to my cable and the encouraging development is 
that my M100 no longer crashes from using it. :) 


  But alas the dvi still does not boot beyond the step where it asks for the 
system disk.


  The drive light comes on early like the manual says to expect, the head seeks 
a tiny bit at power-on, but the main motor does not spin, nor does anything 
else happen in reaction to closing the door latch.


  Oh well. I have another dvi on the way in, and I might just possibly be able 
to diagnose this one eventually. I can at least try the drive by itself in 
another machine, and test another drive in the dvi, and test if the dvi is 
activating the motor-on signal on the floppy cable.


  Since the dvi does "boot" it's own firmware enough to display the first two 
prompts, that does suggest a lot must be right. Cpu, ram, roms, etc. Me and a 
meter and the service manual have a long date some weekend I guess. :)


  -- 
  bkw


  On Oct 27, 2017 12:06 AM, "Mike Stein" <mhs.st...@gmail.com> wrote:

You're welcome ;-)

Why do I bother... ;-)
  - Original Message - 
  From: Randall Kindig 
  To: m...@bitchin100.com 
  Sent: Thursday, October 26, 2017 11:21 PM
  Subject: Re: [M100] DVI cable


  Brian, 


  thank you so much for all the detailed information.  It’s much 
appreciated that you took the time to document what you did.  It’s great when 
members of these groups freely share information and are happy to help others.


  I’m hoping Ian Mavric will take this information and create a working 
cable.


  Randy Kindig

  host Floppy Days Podcast floppydays.com




On Oct 26, 2017, at 4:48 PM, Brian White <bw.al...@gmail.com> wrote:


I just recieved this new info from a member on the facebook group. 

http://tandy.wiki/Disk/Video_Interface#Work_in_progress...

This cable looks home-made too, but he claims he knows it works and has 
used it himself.

Since he not only used the numbers but also a clear picture and 
description of plain physical location, there is no ambiguity about it.

Randy: THIS would seem to be the answer to your question finally. You 
can duplicate this guys cable using the same parts I linked to on that same 
wiki page. But ignore my tentative directions and pictures and go by Ted 
Saari's. (I'll update my directions and pics when I have actually verified it 
for myself, until then I'll just leave the "not yet verified, see below" note 
on mine. But it looks like this is what it's going to end up being.)


It flies in the face of what I said so far! :) His cable has twists in 
it, so that tells me that his DIP connector is pinned the same as mine, because 
I will have to make twists like that too, in order to get the pinout he 
describes.

The first cable I made was actually like that, and didn't boot either, 
but I convinced myself it was because the twists were wrong and I cut the end 
off that cable and scrapped it. So, I predict I still won't get my DVI working 
even after I duplicate this supposedly known-good example.

I have another DVI on the way in, so maybe that one will work.

Glad I ordered 10 dip connectors instead of 1!


-- 
bkw

Re: [M100] DVI cable

[Mike Stein]

Awww... thanks!
;-)

It is a confusing issue though; my head was starting to hurt half way through 
my "discussion" with Brian...

m
  - Original Message - 
  From: John R. Hogerhuis 
  To: m...@bitchin100.com 
  Sent: Friday, October 27, 2017 1:06 AM
  Subject: Re: [M100] DVI cable






  On Thu, Oct 26, 2017 at 10:01 PM, Mike Stein <mhs.st...@gmail.com> wrote:



  I believed you Mike :-)


  -- John. 

Re: [M100] DVI cable

[Mike Stein]

  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Thursday, October 26, 2017 9:11 PM
  Subject: Re: [M100] DVI cable

  Given that, how is it at all remarkable that I consider myself to know 
nothing until I actually see it work in my own hands, or at least see someone 
else's equally incontestable proof showing it working?

  -- 
  bkw

  Here ya go:

Re: [M100] DVI cable

[Mike Stein]

You're welcome ;-)

Why do I bother... ;-)
  - Original Message - 
  From: Randall Kindig 
  To: m...@bitchin100.com 
  Sent: Thursday, October 26, 2017 11:21 PM
  Subject: Re: [M100] DVI cable


  Brian,


  thank you so much for all the detailed information.  It’s much appreciated 
that you took the time to document what you did.  It’s great when members of 
these groups freely share information and are happy to help others.


  I’m hoping Ian Mavric will take this information and create a working cable.


  Randy Kindig

  host Floppy Days Podcast floppydays.com




On Oct 26, 2017, at 4:48 PM, Brian White  wrote:


I just recieved this new info from a member on the facebook group.

http://tandy.wiki/Disk/Video_Interface#Work_in_progress...

This cable looks home-made too, but he claims he knows it works and has 
used it himself.

Since he not only used the numbers but also a clear picture and description 
of plain physical location, there is no ambiguity about it.

Randy: THIS would seem to be the answer to your question finally. You can 
duplicate this guys cable using the same parts I linked to on that same wiki 
page. But ignore my tentative directions and pictures and go by Ted Saari's. 
(I'll update my directions and pics when I have actually verified it for 
myself, until then I'll just leave the "not yet verified, see below" note on 
mine. But it looks like this is what it's going to end up being.)


It flies in the face of what I said so far! :) His cable has twists in it, 
so that tells me that his DIP connector is pinned the same as mine, because I 
will have to make twists like that too, in order to get the pinout he describes.

The first cable I made was actually like that, and didn't boot either, but 
I convinced myself it was because the twists were wrong and I cut the end off 
that cable and scrapped it. So, I predict I still won't get my DVI working even 
after I duplicate this supposedly known-good example.

I have another DVI on the way in, so maybe that one will work.

Glad I ordered 10 dip connectors instead of 1!


-- 
bkw

[M100] Does anybody have an XR4?

[Mike Stein]

By any chance does anyone on the list own an EME XR4?

m

Re: [M100] DVI cable

[Mike Stein]

Randy,

just in case you missed it in all this, the cable that Brian from Missouri 
described here and on his Wiki and that we've argued about for the last week or 
so was incorrect; hopefully it would not damage the DVI or the M100 but 
connecting outputs to outputs instead of inputs is generally a bad idea and the 
fact that his DVI doesn't seem to work any more is suspicious.

To his credit, I see that he's finally corrected the Wiki last night.

Whew.

m
  - Original Message - 
  From: Randall Kindig 
  To: m...@bitchin100.com 
  Sent: Thursday, October 26, 2017 11:21 PM
  Subject: Re: [M100] DVI cable


  Brian,


  thank you so much for all the detailed information.  It’s much appreciated 
that you took the time to document what you did.  It’s great when members of 
these groups freely share information and are happy to help others.


  I’m hoping Ian Mavric will take this information and create a working cable.


  Randy Kindig

  host Floppy Days Podcast floppydays.com




On Oct 26, 2017, at 4:48 PM, Brian White  wrote:


I just recieved this new info from a member on the facebook group.

http://tandy.wiki/Disk/Video_Interface#Work_in_progress...

This cable looks home-made too, but he claims he knows it works and has 
used it himself.

Since he not only used the numbers but also a clear picture and description 
of plain physical location, there is no ambiguity about it.

Randy: THIS would seem to be the answer to your question finally. You can 
duplicate this guys cable using the same parts I linked to on that same wiki 
page. But ignore my tentative directions and pictures and go by Ted Saari's. 
(I'll update my directions and pics when I have actually verified it for 
myself, until then I'll just leave the "not yet verified, see below" note on 
mine. But it looks like this is what it's going to end up being.)


It flies in the face of what I said so far! :) His cable has twists in it, 
so that tells me that his DIP connector is pinned the same as mine, because I 
will have to make twists like that too, in order to get the pinout he describes.

The first cable I made was actually like that, and didn't boot either, but 
I convinced myself it was because the twists were wrong and I cut the end off 
that cable and scrapped it. So, I predict I still won't get my DVI working even 
after I duplicate this supposedly known-good example.

I have another DVI on the way in, so maybe that one will work.

Glad I ordered 10 dip connectors instead of 1!


-- 
bkw

Re: [M100] DVI cable

[Mike Stein]

Good advice, Gary.

Guess I'll have to look through my piles of Commodore drives one of these days 
to see if any of them have that issue; we just had a discussion about this on 
one of the Commodore lists and ISTR that it was mainly only one make 
(Mitsubishi?) and one or two specific caps that had this problem.

FWIW, worst case you can replace the DVI drive with pretty well any half-height 
double density 5.25" drive (or two) as long as it fits mechanically; I replaced 
mine long ago with a pair of Teacs just because I wanted a matching pair and 
couldn't find another drive like the original.

In fact you could even replace it with a 3.5" drive if necessary and you had 
the required adapters and a 3.5" DD boot disk.

m
  - Original Message - 
  From: Gary Hammond 
  To: m...@bitchin100.com 
  Sent: Friday, October 27, 2017 4:17 AM
  Subject: Re: [M100] DVI cable


  My DVI suffered from very similar issues when I first tried to use it. The 
5.25” drive is the same drive family as the notorious C64 disk drive that would 
fail from the capacitors leaking toxic crap on the PCB which subsequently eats 
tracks. I had to replace the caps and manually re-run some of the tracks to get 
it working again. From memory, the tracks that it eats are those relating to 
the read/write circuitry which is why the seek works but no cigar on the 
subsequent read.

   

  Have a close look at the part of the PCB that is the closest to the front of 
the drive.

   

  From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Brian White 
<bw.al...@gmail.com>
  Reply-To: "m...@bitchin100.com" <m...@bitchin100.com>
  Date: Friday, 27 October 2017 at 5:21 PM
  To: "m...@bitchin100.com" <m...@bitchin100.com>
  Subject: Re: [M100] DVI cable

   

  Well now I've added the twists to my cable and the encouraging development is 
that my M100 no longer crashes from using it. :) 

   

  But alas the dvi still does not boot beyond the step where it asks for the 
system disk.

   

  The drive light comes on early like the manual says to expect, the head seeks 
a tiny bit at power-on, but the main motor does not spin, nor does anything 
else happen in reaction to closing the door latch.

   

  Oh well. I have another dvi on the way in, and I might just possibly be able 
to diagnose this one eventually. I can at least try the drive by itself in 
another machine, and test another drive in the dvi, and test if the dvi is 
activating the motor-on signal on the floppy cable.

   

  Since the dvi does "boot" it's own firmware enough to display the first two 
prompts, that does suggest a lot must be right. Cpu, ram, roms, etc. Me and a 
meter and the service manual have a long date some weekend I guess. :)

   

  -- 

  bkw

   

  On Oct 27, 2017 12:06 AM, "Mike Stein" <mhs.st...@gmail.com> wrote:

You're welcome ;-)

 

Why do I bother... ;-)

  - Original Message - 

  From: Randall Kindig 

  To: m...@bitchin100.com 

  Sent: Thursday, October 26, 2017 11:21 PM

  Subject: Re: [M100] DVI cable

   

  Brian, 

   

  thank you so much for all the detailed information.  It’s much 
appreciated that you took the time to document what you did.  It’s great when 
members of these groups freely share information and are happy to help others.

   

  I’m hoping Ian Mavric will take this information and create a working 
cable.

   

  Randy Kindig

  host Floppy Days Podcast floppydays.com

   

   

On Oct 26, 2017, at 4:48 PM, Brian White <bw.al...@gmail.com> wrote:

 

I just recieved this new info from a member on the facebook group. 


http://tandy.wiki/Disk/Video_Interface#Work_in_progress...

This cable looks home-made too, but he claims he knows it works and has 
used it himself.

Since he not only used the numbers but also a clear picture and 
description of plain physical location, there is no ambiguity about it.

Randy: THIS would seem to be the answer to your question finally. You 
can duplicate this guys cable using the same parts I linked to on that same 
wiki page. But ignore my tentative directions and pictures and go by Ted 
Saari's. (I'll update my directions and pics when I have actually verified it 
for myself, until then I'll just leave the "not yet verified, see below" note 
on mine. But it looks like this is what it's going to end up being.)

It flies in the face of what I said so far! :) His cable has twists in 
it, so that tells me that his DIP connector is pinned the same as mine, because 
I will have to make twists like that too, in order to get the pinout he 
describes.

The first cable I made was actually like that, and didn't boot either, 
but I convinced myself it was because the twists were wrong and I cut the end 
off that cable and scrapped 

Re: [M100] DVI cable

[Mike Stein]

- Original Message - 
From: Brian White 
To: m...@bitchin100.com 
Sent: Friday, October 27, 2017 2:16 AM
Subject: Re: [M100] DVI cable


Setting aside the fact that we just spent a week proving that manuals aren't 
bibles and can be full of crap, yes I am following the startup procedure from 
the beginning of the dvi users manual.


0: Everything turned off. Everything connected. Drive door open. No disk in 
drive. Monitor on.


1: M100 on.


2: DVI on.


3: Wait for dvi to say "Insert System Diskette"


4: Insert disk and close drive door.


...doesn't matter what comes next, because nothing else happens.

--
Motor doesn't spin? Light does not come on?
--

Also another manual fallacy: "Be sure the edge with the write protect notch is 
the first to enter the drive."

---
Yeah, I got a chuckle out of that one...
---

Oh really? Well, I am not actually doing that, so, maybe that's why it's not 
working? hehe

---
I wouldn't advise it, but it's in the manual so maybe you should try it just to 
convince yourself... ;-)

Anyway, good luck! Glad to see you finally changed the Wiki.

m

-
On Oct 27, 2017 1:19 AM, "Mike Stein" <mhs.st...@gmail.com> wrote:

> That sounds more like a disk drive or disk problem. 

Indeed, assuming that he's following the correct boot sequence.

BTW, I have a couple of copies of the single sheet addendum to the DVI 
instructions:
"Notice to Users of Radio Shack's DISK/VIDEO INTERFACE"

It  lists the M100 and T200 files on the system diskette and adds the T200 Kill 
and Restart BASIC commands; is it on line somewhere or should I scan it?

m
- Original Message - 
From: John R. Hogerhuis 
To: m...@bitchin100.com 
Sent: Friday, October 27, 2017 12:31 AM
Subject: Re: [M100] DVI cable


That sounds more like a disk drive or disk problem. 


I assume that is farther than it gets without any cable connected at all?


— John. 

Re: [M100] DVI cable

[Mike Stein]

No, the 3.5" disks would have the same format as the DVI's 5.25" disks, which 
is unfortunately substantially different from the TPDD(2) formats.

But it was handy when 5.25" drives became much harder to find than 3.5" ones.

m
  - Original Message - 
  From: Gary Hammond 
  To: m...@bitchin100.com 
  Sent: Friday, October 27, 2017 2:14 PM
  Subject: Re: [M100] DVI cable


  I have installed a 3.5” in the DVI along with the 5.25”. From memory, it 
formats up the disk differently to the TPDD/TPDD2 such that they are not 
interchangeable with the TPDD/TPDD2 which is a shame in some ways. 

   

  From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Mike Stein 
<mhs.st...@gmail.com>
  Reply-To: "m...@bitchin100.com" <m...@bitchin100.com>
  Date: Saturday, 28 October 2017 at 12:51 AM
  To: "m...@bitchin100.com" <m...@bitchin100.com>
  Subject: Re: [M100] DVI cable

   

  Good advice, Gary.

   

  Guess I'll have to look through my piles of Commodore drives one of these 
days to see if any of them have that issue; we just had a discussion about this 
on one of the Commodore lists and ISTR that it was mainly only one make 
(Mitsubishi?) and one or two specific caps that had this problem.

   

  FWIW, worst case you can replace the DVI drive with pretty well any 
half-height double density 5.25" drive (or two) as long as it fits 
mechanically; I replaced mine long ago with a pair of Teacs just because I 
wanted a matching pair and couldn't find another drive like the original.

   

  In fact you could even replace it with a 3.5" drive if necessary and you had 
the required adapters and a 3.5" DD boot disk.

   

  m

- Original Message - 

From: Gary Hammond 

To: m...@bitchin100.com 

Sent: Friday, October 27, 2017 4:17 AM

Subject: Re: [M100] DVI cable

 

My DVI suffered from very similar issues when I first tried to use it. The 
5.25” drive is the same drive family as the notorious C64 disk drive that would 
fail from the capacitors leaking toxic crap on the PCB which subsequently eats 
tracks. I had to replace the caps and manually re-run some of the tracks to get 
it working again. From memory, the tracks that it eats are those relating to 
the read/write circuitry which is why the seek works but no cigar on the 
subsequent read.

 

Have a close look at the part of the PCB that is the closest to the front 
of the drive.

 

From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Brian White 
<bw.al...@gmail.com>
Reply-To: "m...@bitchin100.com" <m...@bitchin100.com>
Date: Friday, 27 October 2017 at 5:21 PM
To: "m...@bitchin100.com" <m...@bitchin100.com>
Subject: Re: [M100] DVI cable

 

Well now I've added the twists to my cable and the encouraging development 
is that my M100 no longer crashes from using it. :) 

 

But alas the dvi still does not boot beyond the step where it asks for the 
system disk.

 

The drive light comes on early like the manual says to expect, the head 
seeks a tiny bit at power-on, but the main motor does not spin, nor does 
anything else happen in reaction to closing the door latch.

 

Oh well. I have another dvi on the way in, and I might just possibly be 
able to diagnose this one eventually. I can at least try the drive by itself in 
another machine, and test another drive in the dvi, and test if the dvi is 
activating the motor-on signal on the floppy cable.

 

Since the dvi does "boot" it's own firmware enough to display the first two 
prompts, that does suggest a lot must be right. Cpu, ram, roms, etc. Me and a 
meter and the service manual have a long date some weekend I guess. :)

 

-- 

bkw

 

On Oct 27, 2017 12:06 AM, "Mike Stein" <mhs.st...@gmail.com> wrote:

  You're welcome ;-)

   

  Why do I bother... ;-)

- Original Message - 

From: Randall Kindig 

To: m...@bitchin100.com 

Sent: Thursday, October 26, 2017 11:21 PM

Subject: Re: [M100] DVI cable

 

Brian, 

 

thank you so much for all the detailed information.  It’s much 
appreciated that you took the time to document what you did.  It’s great when 
members of these groups freely share information and are happy to help others.

 

I’m hoping Ian Mavric will take this information and create a working 
cable.

 

Randy Kindig

host Floppy Days Podcast floppydays.com

 

 

  On Oct 26, 2017, at 4:48 PM, Brian White <bw.al...@gmail.com> wrote:

   

  I just recieved this new info from a member on the facebook group. 


  http://tandy.wiki/Disk/Video_Interface#Work_in_progress...

  This cable looks home-made too,

Re: [M100] diagnose

[Mike Stein]

They were different models:
26-3801 M100, 8K + 24K optional 
26-3802 M100, 24K + 8K optional
26-3803 T102, 24K + 8K optional

m
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Saturday, December 30, 2017 12:44 AM
  Subject: Re: [M100] diagnose






  On Dec 29, 2017 11:53 PM, "Fugu ME100"  wrote:

In the T102 and M100 there are SRAM modules that are plugged into sockets, 
I am not familiar with the M10, but these modules are easy to remove from the 
socket and do not need to be desoldered.




  That's not necessarily true. If a particular unit was sold with 8k, then it 
has 1 module soldered, and 3 sockets. If a particular unit was sold with 24k, 
then it has 3 soldered modules and 1 socket. Same is true for both m100 and 
t102.


  He most likely has to desolder 3 modules. I definitely do.
  -- 
  bkw

Re: [M100] supercap

[Mike Stein]

Agreed.

I've had more problems with leaking alkaline AA cells so I remove those when I 
won't be using the computer for a while; it's always a pleasant surprise to 
come back months later, put in fresh AAs and be right back where you were.

BTW, unless you already replaced them the NiCds lasted more like 30 years, not 
just 20.

m
  - Original Message - 
  From: John R. Hogerhuis 
  To: m...@bitchin100.com 
  Sent: Thursday, January 04, 2018 2:07 PM
  Subject: Re: [M100] supercap






  On Thu, Jan 4, 2018 at 10:53 AM, Brian White  wrote:

If you aren't going to use a solid state cap that can't ever leak a 
corrosive substance onto the board, then why trade a sleep time of months for a 
sleep time of days?




  Yep.

  Nothing lasts forever... replace with a NiCd and you get another 20 years. 
The system works as we love it, as designed. Lasts for 20 more years or, more 
likely, fails for some other reason. 

  Probably some other leaky cap :-)

  And out 20 years, you have to wonder if you're going to be beyond caring.

  IMO the NiCd was a fantastic design decision. I have plenty of other vintage 
RAM filesystem based devices that use caps or coin cells. They all suck 
compared to the 100/102/200 in large part due to the weaknesses of those memory 
backup systems.

  -- John.

Re: [M100] DVI Operation

[Mike Stein]

The original message came through my Gmail account without a problem; I'm 
ashamed to say that I haven't had time until today to reply and it'll be at 
least a few more days before I can dig out my DVI and test what Jan wants to 
know.

Since your DVI is working now, maybe you can get to it sooner?

m
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Thursday, January 04, 2018 3:34 PM
  Subject: Re: [M100] DVI Operation


  Possibly the reason you feel ignored is your first post was sent to spam in 
gmail.


  I didn't see it until today.


  Gmail sticks this supremely helpful message on it:


  "Why is this message in Spam? It's from an address in the yahoo.com domain 
but has failed yahoo.com's required tests for authentication."


  I don't know what it *really* means, and I don't know if there is anything 
you can do about it on the client side, or if it's some misconfiguration in the 
mail list or if there is even anything actually wrong and it's actually gmail 
in error. It happens to a number of posts though.


  -- 
  bkw


  On Jan 4, 2018 4:04 AM, "VANDEN BOSSCHE JAN"  
wrote:

A guy walks in to the doctor's office. 

He says:

"Doctor, I have the impression that people are constantly ignoring me."

The doctor says:

"NEXT!"



Greetings from the TyRannoSaurus

Jan-80   |\  _,,,--,,_

@ work  / ,`.-'`'   ._  \-;;,

   |,4-  ) )_.;.(  `'-'

  <---''(_/._)--'(_\_)



From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Jan 
Vanden Bossche
Sent: dinsdag 2 januari 2018 14:53
To: m...@bitchin100.com
Subject: [M100] DVI Operation



[..]



Could anybody with a DVI perform the following test:

- start the DVI & the monitor

- start the Model T without the DOS

- in BASIC, type SCREEN 1,1

Does the DVI react ?



If it does, I have my answer. Next thing to do, is start scanning codes 
with a Raspberry Pi hooked up to the I/O bus of the Model T.



Greetings from the TyRannoSaurus
Jan-80






From: Brian White 
To: m...@bitchin100.com 
Sent: Wednesday, 27 December 2017, 21:56
Subject: Re: [M100] Rex ram/rom

[..]

Video expansion? Do you mean you want a Disk/Video Interface?



The DVI uses the system bus. 

[..]

 Rejoignez-nous sur Facebook - Volg ons op Facebook 

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We kunnen niet garanderen dat de gegevensoverdracht via het internet veilig en 
nauwkeurig is.

  ­­  

Re: [M100] Looking for the Barcode drivers on the 26-3846 cassette

[Mike Stein]

Thanks in large part to Rich Cini and despite some technical issues, here are 
.WAV files of the M100 Bar Code drivers and programs; the only one AFAIK still 
outstanding is 26-1183A which includes the DVI versions.

26-1183 (Original drivers supplied with the wand):
https://drive.google.com/open?id=1BRfvgl0kTT-VvjoN39Z66WcIkmE9Qwld

26-3846 (Additional drivers)
https://drive.google.com/open?id=1MHdmylxARwnCcNxuKOa6J91rhwOITCo7

26-3845 (Bar Code Generator)
https://drive.google.com/open?id=1Do8R5v0K0tEMWZQa1MErzwjJ5CQ-UX7Y

m
  - Original Message - 
  From: Peter Noeth 
  To: m100@lists.bitchin100.com 
  Sent: Wednesday, December 13, 2017 2:42 AM
  Subject: [M100] Looking for the Barcode drivers on the 26-3846 cassette


  Hello Group,


I am new to this list, having just discovering the Club100 website several 
months ago. I was quite shocked to see that there had been product development 
for the M100 computer as recently as 2011!!


My inquiry to the list is that I am looking for the "2of5", "Codabar" and 
"UPC-E" barcode drivers that were made available on the 26-3846 cassette for 
the Model 100 computer. This cassette was not very well advertised, and I have 
not seen one come up on eBay yet, although the standard Barcode wand and 
cassette do show up from time to time.


I have had a Model 100 shortly after they first came out in '83 (mine was a 
March '84) and later swapped it for a M102.


I use the M102 today for Electronics calculations and as a Barcode Data 
Capture device.


I would like to get the additional barcode drivers to complete my 
collection, as I do have a project to use 2of5. The format could be a memory 
dump of each driver, or a copy on tape.


  Regards,


  Peter Noeth

Re: [M100] gps

[Mike Stein]

What are you using for the receiver?

- Original Message - 
From: "Peter Vollan" <dprogra...@gmail.com>
To: <m...@bitchin100.com>
Sent: Monday, January 22, 2018 8:56 PM
Subject: Re: [M100] gps


> ISTR that there was a webpage about it. Right now I need the pinout
> into to hack the serial cable together.
> 
> The question of "why do this" has come up before as well. Let me worry
> about that one
> 
> 
> On 22 January 2018 at 13:58, Mike Stein <mhs.st...@gmail.com> wrote:
>> That might be me; we did have some discussions about the protocol etc. way 
>> back when and I did use the M100 with a Delorme Tripmate to log my trips for 
>> a while; fun and some interesting data, but not terribly useful in the end.
>>
>> I can't find any notes or programs at a fast look but it wasn't very 
>> complicated; just a matter of parsing the data stream into its various 
>> fields.
>>
>> I'll have another look around for anything from those days.
>>
>> m
>>
>> - Original Message -
>> From: "Peter Vollan" <dprogra...@gmail.com>
>> To: <m...@bitchin100.com>
>> Sent: Sunday, January 21, 2018 6:03 PM
>> Subject: [M100] gps
>>
>>
>>>A while back, years ago probably, someone detailed how they used a GPS
>>> unit with a serial connection to their Model 100. I went as far as
>>> acquiring the GPS unit and the connector for it to splice into a
>>> cable, then the project got stalled. Anyone know where I could find
>>> this info?

Re: [M100] DVI issue

[Mike Stein]

"...when I reset the M100 nothing happens.  It doesn’t matter whether I soft 
reset or hard reset."

Nothing at all? It doesn't try to read a disk?

m


- Original Message - 
From: "Randall Kindig" 
To: 
Sent: Friday, January 26, 2018 11:43 AM
Subject: [M100] DVI issue


hi, all,

I’m having an issue with my DVI box and was hoping someone on this list could 
point me in the right direction or had suggestions.

I have a really clean DVI I recently purchased.  The picture showed that it 
booted to the initial screen off of the boot disk, so I assumed the drive and 
the DVI itself were good.  The seller did not misrepresent it.  They showed it 
booting to the initial screen and did not test it further with an M100 and DVI 
cable.

I got a cable and boot disks (with backup disk as well) from someone else that 
was tested to be good.

When I hooked up the M100 and cable to the DVI, it indeed booted off of the 
disk.  At that point, you reset the M100 and it’s then supposed to load further 
software off the disk and the screen of the M100 is now routed to the monitor, 
with more columns and rows.

However, when I reset the M100 nothing happens.  It doesn’t matter whether I 
soft reset or hard reset.

To verify this setup further, I bought a second M100 and tried it to take that 
out of the equation.  No difference.

I then got a second cable from the gentlemen who was making the cables to make 
sure the cable wasn’t the issue.  No difference.

I can only conclude that there’s some inside the DVI box.  The tests point to 
the fact that all other parts of the chain are fine: M100, cable, disks, disk 
drive.

Does anyone have any experience with the DVI box?  I have the electronic form 
of the service manual, but it gets into electronic troubleshooting for which I 
don’t have the skills or experience.

Any help would be much appreciated.

Randy kindig

Re: [M100] gps

[Mike Stein]

Yeah, there's at least one article detailing the mod, as well as a mod to pass 
external power through the port:
http://n3ujj.com/TripMate_Self_Start_Modification.html

Not sure that it's relevant to Peter's Earthmate though.

m
  - Original Message - 
  From: Douglas Quagliana 
  To: m...@bitchin100.com 
  Sent: Wednesday, January 24, 2018 10:32 AM
  Subject: Re: [M100] gps


  Regarding those Tripmates, they won't send GPS data to the computer until you 
send the magic string "ASTRAL" to the Tripmate.

  You can either send "ASTRAL" from the M100, or short pins 2 and 3 (TxD and 
RxD) at either end of the cable.  The Tripmate 

  actually expects AND sends the "ASTRAL" string to the M100, thus shorting 
pins 2 and 3 will send the string back to the Tripmate
  and jump start it.

  Douglas



  On Tue, Jan 23, 2018 at 8:09 PM, Mike Stein <mhs.st...@gmail.com> wrote:

Mine is a Tripmate, which has a 9-pin RS-232 cable.
e.g.:

https://www.ebay.com/p/DeLorme-Tripmate-GPS-Receiver/140809409


- Original Message -
From: "Peter Vollan" <dprogra...@gmail.com>
To: <m...@bitchin100.com>

Sent: Tuesday, January 23, 2018 2:09 PM
Subject: Re: [M100] gps


> Delorme Earthmate 9538 v1.0
> Wasn't that the one you used?
> I think maybe I could buy a serial cable instead of making one?
>
>
>
> On 22 January 2018 at 21:23, Mike Stein <mhs.st...@gmail.com> wrote:
>> What are you using for the receiver?
>>
>> - Original Message -
>> From: "Peter Vollan" <dprogra...@gmail.com>
>> To: <m...@bitchin100.com>
>> Sent: Monday, January 22, 2018 8:56 PM
>> Subject: Re: [M100] gps
>>
>>
>>> ISTR that there was a webpage about it. Right now I need the pinout
>>> into to hack the serial cable together.
>>>
>>> The question of "why do this" has come up before as well. Let me worry
>>> about that one
>>>
>>>
>>> On 22 January 2018 at 13:58, Mike Stein <mhs.st...@gmail.com> wrote:
>>>> That might be me; we did have some discussions about the protocol etc. 
way back when and I did use the M100 with a Delorme Tripmate to log my trips 
for a while; fun and some interesting data, but not terribly useful in the end.
>>>>
>>>> I can't find any notes or programs at a fast look but it wasn't very 
complicated; just a matter of parsing the data stream into its various fields.
>>>>
>>>> I'll have another look around for anything from those days.
>>>>
>>>> m
>>>>
>>>> - Original Message -
>>>> From: "Peter Vollan" <dprogra...@gmail.com>
>>>> To: <m...@bitchin100.com>
>>>> Sent: Sunday, January 21, 2018 6:03 PM
>>>> Subject: [M100] gps
>>>>
>>>>
>>>>>A while back, years ago probably, someone detailed how they used a GPS
>>>>> unit with a serial connection to their Model 100. I went as far as
>>>>> acquiring the GPS unit and the connector for it to splice into a
>>>>> cable, then the project got stalled. Anyone know where I could find
>>>>> this info?
>

Re: [M100] is Club 100 still taking orders?

[Mike Stein]

Let me ask yet once again: Why can't you, Ken, or whoever else has access to 
the web site just put a simple notice across the top saying that the store/web 
site is effectively closed and to contact us/them through the mailing list?

I'm sure some folks just assume the 'club' is dead and leave with a bad taste 
after placing an order or inquiry and waiting for a reply that never comes...

m
  - Original Message - 
  From: John R. Hogerhuis 
  To: m...@bitchin100.com 
  Sent: Sunday, January 28, 2018 10:22 PM
  Subject: Re: [M100] is Club 100 still taking orders?


  Welcome back!


  The club 100 store is basically closed until further notice. 


  But the community is thriving and that’s the real Club 100. 


  A few members are working on making Rex units for themselves and others.  And 
people generally roll their own nadsbox equivalents. PCs are good for storage 
as are some android devices. 


  -= Model T’s Forever =-


  — John. 

[M100] Fw: HD44103 data sheet

[Mike Stein]

Try this:

https://drive.google.com/drive/folders/13ITleFmcEjuzxSp1kvVipo__T1ec2KmT
  - Original Message - 
  From: Gregory McGill 
  To: m...@bitchin100.com 
  Sent: Monday, February 05, 2018 11:42 AM
  Subject: Re: [M100] HD44103 data sheet


  link is broken


  On Sun, Feb 4, 2018 at 11:44 PM, Brian White  wrote:

The most commonly found data sheet for the HD44103 lcd driver chip on the 
lcd pcb is pretty low quality and doesn't include a pinout for the QFP-44 
package used in the M100.

I extracted a nicer version of the data sheet from a larger combined pdf 
(Hitachi-LCD.pdf) that had sheets for several related chips, and worked out the 
pinout from looking at the m100 service manual, and found an editable SVG 
template for qfp-44 and assembled a new pdf for hd44103 with the nice clean 
main data sheet and with a page inserted for the qfp-44 diagram. The rest of 
the datasheet still refers to only the FP-60 pin numbers, but you can ignore 
the pin numbers and just use the signal names VCC, X1, V1, etc...


​I extracted a nicer pdf for HD44012 also, but ​that didn't need any 
additions or changes. It's just a clearer version of the same info. It might be 
a little more complete. The source document Hitachi-LCD.pdf seems to be a later 
version than the scanned fax looking version that you find on most datasheet 
sites.


https://drive.google.com/open? ​​id=13ITleFmcEjuzxSp1kvVipo__T1ec2KmT



-- 

bkw

Re: [M100] List of wanna haves

[Mike Stein]

Just curious: how would you use it?

m

- Original Message - 
From: "Randy Kindig" 
To: 
Sent: Wednesday, February 07, 2018 5:20 PM
Subject: Re: [M100] List of wanna haves


> Agreed!  Just the video part of the DVI would be high on my list
> 
> Randy
> 
> Sent from my iPhone
> 
>> On Feb 7, 2018, at 11:32 AM, Josh Malone  wrote:
>> 
>> Yeah - a replica DVI would be an awesome bit of modern kit for the
>> M100/102. Even if it didn't have the disk part, the video part would
>> rule!

Re: [M100] dip40 idc for dvi cable

[Mike Stein]

When we had our lengthy discussion a while back I posted the manufacturer and 
part number of the 'reversed' one. They're still in business and maybe still 
make it; might be worth an inquiry:

Yamaichi FCP-40-03

m
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Monday, February 05, 2018 1:59 AM
  Subject: [M100] dip40 idc for dvi cable


  Ever since the DVI cable thread recently I've been looking for DIP IDC 
connectors that have the flipped pinout like the original Tandy cable has, so 
you could just crimp the cable without any pain in the neck twisting every pair 
of wires.


  Well by now I have found 5 different manufacturers of a dip40 connector and a 
6th yet another manufacturer of a dip24 connector, and they ALL connect pin 1 
to wire 2, and pin 40 to wire 1, and so needs the twists.


  That's all, just reporting findings.


  https://photos.app.goo.gl/UhRHhuOCz3DtfZl83



  -- 
  bkw

Re: [M100] DVI cable for 200

[Mike Stein]

Nice!

Certainly a lot more work than a double-headed male header but it does give you 
a keyed connector at the computer end.

m

- Original Message - 
  From: Brian White 
  To: Model 100 Discussion 
  Sent: Tuesday, February 06, 2018 2:19 AM
  Subject: [M100] DVI cable for 200


  I just made a working cable for DVI for Model 200 that doesn't need any 
twists in the cable and is polarity keyed and shrouded.


  It's annoying that you have to solder two parts together, but the end result 
is a cable that is keyed and shrouded, AND fits in a 200 (also 102 but 200 is 
the difficult one)


  On the 200 end of the cable you just solder together a through-hole pcb 
solder type shrouded male pin header and a "wire to board" 40 pin idc 
connector. It's a bit fiddly manually holding the two connectors just right 
until you get one pin soldered. Then still have to be careful not to melt the 
pins out of the connector. But in the end it's probably actually easier or more 
reproduceable than splitting and twisting all those pairs of wires and then 
trying to crimp them all at once. And a better/safer cable than using a 
double-ended male-male 40p header on an ide cable, because the male pins are 
shrouded, and both connectors are polarity keyed.


  https://photos.app.goo.gl/h53pg61U0qEAIawx1

Re: [M100] List of wanna haves

[Mike Stein]

it ? (thàt's the question)

   

  The above experiment would show if it's at all possible to run a monitor-only 
part of a DVI, without loading software on the Model T to do so. I hope, that 
the simple command SCREEN 1,1 does send some screen-positioning code through 
the bus towards the DVI, even without the drivers loaded on the Model T.  If it 
does, some clever programming on the receiving side could just give us the 
DVI/video-only device we seek.

   

  Greetings from the TyRannoSaurus
  Jan-80

   


------

  From: Mike Stein <mhs.st...@gmail.com>
  To: m...@bitchin100.com 
  Sent: Thursday, 8 February 2018, 3:49
  Subject: Re: [M100] List of wanna haves

   

  Just curious: how would you use it?

   

  m

   

  - Original Message - 

  From: "Randy Kindig" <randall.kin...@gmail.com>

   

  > Agreed!  Just the video part of the DVI would be high on my list

   

   

  VIVAQUA et HYDROBRU ont fusionné. 
  VIVAQUA est votre société d'eau en Région de Bruxelles-Capitale. 

  VIVAQUA en HYDROBRU zijn gefusioneerd. 
  VIVAQUA is uw waterbedrijf in het Brusselse Hoofdstedelijk Gewest. 

   Rejoignez-nous sur Facebook - Volg ons op Facebook 



  DISCLAIMER

  Pensez à l’environnement, n’imprimez cette page et ses annexes que si c’est 
nécessaire. Ce message électronique, y compris ses annexes, est confidentiel et 
réservé à l’attention de son destinataire. Si vous n’êtes pas le destinataire 
de ce message, merci de le détruire et d’en informer l’expéditeur. Toute 
divulgation, copie ou utilisation de ce mail est dans ce cas interdite. La 
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  Denk aan het milieu; druk deze pagina en de bijlagen alleen af als het nodig 
is. Dit e-mailbericht (inclusief zijn bijlagen) is vertrouwelijk en is 
uitsluitend bestemd voor de geadresseerde. Als dit bericht niet voor u bestemd 
is, wordt u verzocht het te wissen en de afzender te informeren. Het is in dat 
geval niet toegestaan dit bericht te verspreiden, te kopiëren of te gebruiken. 
We kunnen niet garanderen dat de gegevensoverdracht via het internet veilig en 
nauwkeurig is.

­­   

Re: [M100] List of wanna haves

[Mike Stein]

ving side could just give us the 
DVI/video-only device we seek.

   

  Greetings from the TyRannoSaurus
  Jan-80

   


------

  From: Mike Stein <mhs.st...@gmail.com>
  To: m...@bitchin100.com 
  Sent: Thursday, 8 February 2018, 3:49
  Subject: Re: [M100] List of wanna haves

   

  Just curious: how would you use it?

   

  m

   

  - Original Message - 

  From: "Randy Kindig" <randall.kin...@gmail.com>

   

  > Agreed!  Just the video part of the DVI would be high on my list

   

   

  VIVAQUA et HYDROBRU ont fusionné. 
  VIVAQUA est votre société d'eau en Région de Bruxelles-Capitale. 

  VIVAQUA en HYDROBRU zijn gefusioneerd. 
  VIVAQUA is uw waterbedrijf in het Brusselse Hoofdstedelijk Gewest. 

   Rejoignez-nous sur Facebook - Volg ons op Facebook 



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nécessaire. Ce message électronique, y compris ses annexes, est confidentiel et 
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nauwkeurig is.

­­   

Re: [M100] List of wanna haves

[Mike Stein]

I guess the thing that makes it relatively uninteresting for me is that you'll 
have to be tethered to a display of some kind, which negates the most 
attractive aspect of the ModelT, its portability; you might as well just run VT 
on a laptop.

m
  - Original Message - 
  From: John R. Hogerhuis 
  To: m...@bitchin100.com 
  Sent: Tuesday, February 13, 2018 12:13 PM
  Subject: Re: [M100] List of wanna haves




  On Tue, Feb 13, 2018 at 7:26 AM Mike Stein <mhs.st...@gmail.com> wrote:




And I haven't had an answer to what you want to do with it ;-)



I'm not aware of any software that uses the 80x25 screen mode, and 
redirecting the 8x40 display through the com port to a Pi or laptop etc. is 
trivial, so what makes this worth while (other than the challenge/fun) ?




  Definitely the more doable solution for non EE’s.


  Something like Coco drivewire but more portable. Pi with battery. 




  The serial connection is certainly faster than the built in display, at least 
for scrolling text. 


  Downside is you lose the port for other purposes (tpdd access) unless you 
packet multiplex. That would mean more software tricks on model t side. 


  — John. 

Re: [M100] List of wanna haves

[Mike Stein]

Now, now, Jan, no need to get snippy ;-)

Although I'm pretty sure that the answer is as Brian posted, I did (and still 
do) want to do some testing  on a real DVI as you asked instead of making an 
assumption; I thought about the same thing quite a few years ago and did some 
investigating, even disassembling parts of the Disk BASIC overlay, but 
unfortunately can't find my notes from that time.

Unfortunately I didn't realize that this was an urgent issue requiring 
immediate action and thought it could wait until I could find some time to dig 
the DVI out of storage, find a monitor, hook up an LA, etc. etc.

Sorry you couldn't wait; that's the trouble with asking hobbyists to do 
something for you...

I understand that you want a solution that connects through the system bus and 
emulates DVI video exactly; I just wanted to display the M100's screen across 
the room on a 40" TV while comfortably reposing an the couch playing games, so 
I chose the easy way using the serial port.

I thought maybe this would be interesting while waiting for Ken's complete 
solution (especially since using the com port allows a wireless Bluetooth 
connection), but apparently not, so I was curious what you and others wanted to 
do that this didn't satisfy.

As John pointed out it does tie up the serial port, but it seems that you might 
also be able to use the same connection with TS-DOS or similar.

BTW, there's also an article in Portable100 about using the parallel port, but 
although I happen to have the exact obsolete hardware used it looked a lot more 
complicated and limiting.

I'm not sure where you're getting '40 x 16' video as in your other post; AFAIR 
it's either the normal 8 x 40 or 24/25 x 80.

One other thing: the DVI is text only; if you're going to the trouble (as Ken 
probably will) then you might want to also add graphics (even if only the PSET 
etc. functions) and maybe even colour, which will obviously complicate the 
situation somewhat.

m
  - Original Message - 
  From: VANDEN BOSSCHE JAN 
  To: m...@bitchin100.com 
  Sent: Wednesday, February 14, 2018 8:33 AM
  Subject: Re: [M100] List of wanna haves


  What's so interesting abou an external screen ? I can hook up a HDMI 24" 
screen to my modern laptop, but you don't see me hauling one around. It is just 
another thing that makes working on you computers a bit more comfortable when 
you're not on the move. You only use your Model T when you travel ?

   

  The DVI is the old-school equivalent of a docking station or a 
port-replicator. Why would it be useless to re-create that with modern 
technology, certainly now that 'its so cheap?

   

  Anyway, forget it, forget I asked. I have gotten the impression that by 
asking something that doesn't sound useful for the technical guys, I have 
irritated those people. 

  Sorry guys, I won't do it again. Just drop it.

   

  Greetings from the TyRannoSaurus / Jan-80@work

   

  From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of John R. 
Hogerhuis
  Sent: dinsdag 13 februari 2018 20:16
  To: m...@bitchin100.com
  Subject: Re: [M100] List of wanna haves

   

   

  On Tue, Feb 13, 2018 at 11:02 AM Mike Stein <mhs.st...@gmail.com> wrote:

I guess the thing that makes it relatively uninteresting for me is that 
you'll have to be tethered to a display of some kind, which negates the most 
attractive aspect of the ModelT, its portability; you might as well just run VT 
on a laptop.

 

m

   

  Well might nice for dev on real hardware. But the only time I do that is when 
I’m testing serial port stuff so, yeah. 

   

  Which I think is why when we’ve talked about this before the parallel port 
seems the better way. But then you need even more hardware. 

   

  — John. 

  VIVAQUA et HYDROBRU ont fusionné. 
  VIVAQUA est votre société d'eau en Région de Bruxelles-Capitale. 

  VIVAQUA en HYDROBRU zijn gefusioneerd. 
  VIVAQUA is uw waterbedrijf in het Brusselse Hoofdstedelijk Gewest. 

   Rejoignez-nous sur Facebook - Volg ons op Facebook 



  DISCLAIMER

  Pensez à l’environnement, n’imprimez cette page et ses annexes que si c’est 
nécessaire. Ce message électronique, y compris ses annexes, est confidentiel et 
réservé à l’attention de son destinataire. Si vous n’êtes pas le destinataire 
de ce message, merci de le détruire et d’en informer l’expéditeur. Toute 
divulgation, copie ou utilisation de ce mail est dans ce cas interdite. La 
sécurité et l’exactitude des transmissions de messages électroniques ne peuvent 
être garanties.

  Denk aan het milieu; druk deze pagina en de bijlagen alleen af als het nodig 
is. Dit e-mailbericht (inclusief zijn bijlagen) is vertrouwelijk en is 
uitsluitend bestemd voor de geadresseerde. Als dit bericht niet voor u bestemd 
is, wordt u verzocht het te wissen en de afzender te informeren. Het is in dat 
geval niet toegestaan dit bericht te verspreiden, te kopiëren of te gebruiken. 
We kunnen niet garanderen dat de ge

Re: [M100] List of wanna haves

[Mike Stein]

Can't slip anything past you, can I ... ;-)

If you're going to use the ZIF intermediate socket then you'll have to use a 
cover with a cutout as shown in the DVI manual P.9, or no cover at all.

But if you're not going to use the ZIF socket (since you'll be (un)plugging at 
the other end), then there's enough clearance to use the normal cover as shown 
below; there is a corresponding recess in the case bottom for the cable.

I suspect that was the original idea until folks started to break pins on the 
DIP connector, and they supplied the ZIF socket and notched cover as the 
solution.

m
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Saturday, February 17, 2018 12:06 AM
  Subject: Re: [M100] List of wanna haves


  But your picture that he asked about is not using this cutout cover.



  On Fri, Feb 16, 2018 at 6:06 PM, Mike Stein <mhs.st...@gmail.com> wrote:

The DVI came with a replacement cover that has a cutout for the cable:



  - Original Message - 
  From: Fugu ME100 
  To: m...@bitchin100.com 
  Sent: Friday, February 16, 2018 5:11 PM
  Subject: Re: [M100] List of wanna haves


  Very nice, I need to find my velcro.  The M100 to T102 upgrade :)


  Did you cut the cover? Or is sufficiently flexible to bend over the cable?


  From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Mike Stein 
<mhs.st...@gmail.com>
  Reply-To: <m...@bitchin100.com>
  Date: Friday, February 16, 2018 at 11:39 AM
  To: <m...@bitchin100.com>
  Subject: Re: [M100] List of wanna haves




- Original Message - 
From: Fugu ME100 
To: m...@bitchin100.com 
Sent: Wednesday, February 14, 2018 2:00 PM
Subject: Re: [M100] List of wanna haves
...
> I fixed the Model M100 problem by using a ZIF socket in the IC 
socket.  This I think was the original way the DVI was sold at least based on 
my review of the docs for the DVI.  But yes that is a pain.
=
Yes, the DVI came with a ZIF socket.

Here's my solution, using a bit of Velcro:





  -- 

  bkw

Re: [M100] List of wanna haves

[Mike Stein]

It's been a long time, but IIRC there was no problem using the 3.5" disks; of 
course you didn't gain any capacity and they did still only store 360KB. Are 
any of the other folks who played with this still on the list by any chance?

The 4-drive version shown was only a mockup IIRC, but I see no reason why it 
couldn't work with a couple of switches to switch between 5.25 and 3.5.

Unfortunately I can't remember now why we did it... ;-)

m

  - Original Message - 
  From: Kurt McCullum 
  To: m...@bitchin100.com 
  Sent: Friday, February 16, 2018 10:27 PM
  Subject: Re: [M100] List of wanna haves


  Interesting. Did you ever get the 3.5" disks to work?

   

  Kurt

   

  From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Mike Stein
  Sent: Friday, February 16, 2018 3:28 PM
  To: m...@bitchin100.com
  Subject: Re: [M100] List of wanna haves

   

  Some DVI pics from way back when we were exploring 3.5" disks:

   



   



   

   

   

   

   

Re: [M100] Is this for real?

[Mike Stein]

I think we tend to forget that e.g. $200.00 is not the same for someone making 
$20,000 as it is for someone making $200,000...

m
  - Original Message - 
  From: Christopher C 
  To: m...@bitchin100.com 
  Sent: Friday, February 16, 2018 9:17 AM
  Subject: Re: [M100] Is this for real?


  I have usually been able to find the retro computers that I was after, at a 
reasonably low price, by being patient and alert (automated and manual eBay 
searches, looking in CL, word-of-mouth).  However there have been times that I 
had some extra money and did not want to wait years for a ‘perfect' storm of 
low price, possibly a misspelled subject line and no one else looking that day 
and paid more than I should have for some of the items that I’ve collected.  It 
is tax refund season in the US and explaining a few unusually high prices could 
be no more sinister than that.


  Chris 

On Feb 16, 2018, at 1:19 AM, Barry Rands  wrote:


Notice that the seller advertised the TDD as "mint" condition. When the 
buyer finds out the drive belt has turned to goo, the seller can always say 
"Oh, that's the chocolate coating on the mint that must have melted off into 
the drive"


On Wed, Feb 14, 2018 at 8:31 AM, Frederick Whitaker  
wrote:

  There are people out there that go by the rule "Buy low, Sell High." They 
know that there are fools out there that think the Tandy Portables are real 
"antiques" and might be a good financial investment. It is unfortunate that 
such people are out there.

  Fred Whitaker




  On 2/14/2018 6:20 AM, Chris Kmiec wrote:

I don't have a problem paying good money for retro stuff that warrants 
it. I enjoy playing with the Tandy portables, one if the reasons being because 
they are so cheap to find. I don't have to worry about babying them too much. 


I could maybe see $300-400 for a sealed, NIB 102. MAYBE $500. $800 for 
a used one is just plain crazy - either two bidders that have way too much 
money, or eBay fraud.


On Feb 13, 2018 10:04 PM, "Doug Jackson"  wrote:

  Retro gear is just sometimes expensive.  $4k for an imsai 8080 isn't 
unheard of.


  On 14 Feb. 2018 2:37 pm, "Chris Fezzler"  wrote:

I found it fun to buy computers from when the industry was battling 
with innovations and different form factors.  A lot of real innovative 
engineers out there.



On ‎Tuesday‎, ‎February‎ ‎13‎, ‎2018‎ ‎09‎:‎34‎:‎16‎ ‎PM‎ ‎EST, 
Kevin Becker  wrote: 




“Retro” computing stuff seems to be going up in price lately. Even 
things that didn’t seem very retro to me. Look at the prices for old 
486/pentium machines.  There are some wild ideas about the value of a generic 
beige x86 tower. 

On Feb 13, 2018, at 9:22 PM, Chris Fezzler  
wrote:


  Fake to drive up prices?



  On ‎Tuesday‎, ‎February‎ ‎13‎, ‎2018‎ ‎09‎:‎10‎:‎23‎ ‎PM‎ ‎EST, 
Kevin Becker  wrote: 




  I was watching the TPDD2 and was disappointed when it went over 
$100 because one went for $60 or $70 a week ago. 


  It makes no sense they went so high. It looks like to two 
different buyers too. 

  On Feb 13, 2018, at 9:05 PM, Chris Kmiec  
wrote:


Check these two auctions that just ended... 


Tandy-Portable-Disk-Drive-2



and


Tandy-102



How, why, WHAT??









-- 

Barry Rands, PE, LEED AP

81 Encanto Lane

San Luis Obispo, CA 93401
805-704-1549 (cell)
805-783-2038 (home)

Re: [M100] List of wanna haves

[Mike Stein]

>...I miss DOS, and command line Linux, but I no longer have machines that give 
>me access to DOS
...

There are several ways to run DOS on a modern machine; DOSBOX (for example) is 
one, and another approach is a DOS bootable USB stick.

m

- Original Message - 
From: "Frederick Whitaker" 
To: 
Sent: Wednesday, February 14, 2018 4:27 PM
Subject: Re: [M100] List of wanna haves


>I remember the club members wanting to expand the Model 100's so that it 
> can work more efficiently, and provide externals that assist in doing 
> that. The DVI made it a little like a desktop computer. The external 
> Disk Drives made it possible to store files on disks so that they could 
> be accessed later.
> 
> In recent years the REX, NADSBOX, Quattro, and other things have appeared.
> 
> What fascinates me about the projects that are being suggested today is 
> that they are way beyond the innate capacity of the Model "T". Why are 
> we not writing programs for the Model "T" anymore? Why are we trying to 
> mimic the contemporary Desk Top Computer? Why are we not writing 
> assembly programs for it?
> 
> I get the idea that many of the club members see it as a novelty, rather 
> than a genuine computer. It was the first of its kind. For many years it 
> was used to write newspaper articles and send them over the phone lines 
> to the publisher. It was used for controlling devices; like entry gates, 
> lights, and other things. Until recently it was used for controlling 
> traffic lights in Greenville, South Carolina. It is a genuine computer.
> 
> Are we not interested in writing programs for it anymore? Do we only 
> take it out to write an article, or take notes? Is it no longer 
> interesting in itself?
> 
> I miss DOS, and command line Linux, but I no longer have machines that 
> give me access to DOS, and with all the programs already available for 
> Linux I am no longer motivated to work at the command level.
> 
> It is noteworthy that there is still interest in the Model "T", but more 
> work could be accomplished if each of us stuck with one project at a 
> time. I miss Dave?
> 
> Fred Whitaker
> 
> 
> On 2/14/2018 2:20 PM, John R. Hogerhuis wrote:
>> Can we lower the temperature a bit?
>>
>> We're all long time members of Club100. No need to get adversarial 
>> over tech questions / ideas.
>>
>> -- John.

Re: [M100] List of wanna haves

[Mike Stein]

- Original Message - 
From: Fugu ME100 
To: m...@bitchin100.com 
Sent: Wednesday, February 14, 2018 2:00 PM
Subject: Re: [M100] List of wanna haves
...
> I fixed the Model M100 problem by using a ZIF socket in the IC socket.  This 
> I think was the original way the DVI was sold at least based on my review of 
> the docs for the DVI.  But yes that is a pain.
=
Yes, the DVI came with a ZIF socket.

Here's my solution, using a bit of Velcro:

Re: [M100] List of wanna haves

[Mike Stein]

The DVI came with a replacement cover that has a cutout for the cable:



  - Original Message - 
  From: Fugu ME100 
  To: m...@bitchin100.com 
  Sent: Friday, February 16, 2018 5:11 PM
  Subject: Re: [M100] List of wanna haves


  Very nice, I need to find my velcro.  The M100 to T102 upgrade :)


  Did you cut the cover? Or is sufficiently flexible to bend over the cable?


  From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Mike Stein 
<mhs.st...@gmail.com>
  Reply-To: <m...@bitchin100.com>
  Date: Friday, February 16, 2018 at 11:39 AM
  To: <m...@bitchin100.com>
  Subject: Re: [M100] List of wanna haves




- Original Message - 
From: Fugu ME100 
To: m...@bitchin100.com 
Sent: Wednesday, February 14, 2018 2:00 PM
Subject: Re: [M100] List of wanna haves
...
> I fixed the Model M100 problem by using a ZIF socket in the IC socket.  
This I think was the original way the DVI was sold at least based on my review 
of the docs for the DVI.  But yes that is a pain.
=
Yes, the DVI came with a ZIF socket.

Here's my solution, using a bit of Velcro:

Re: [M100] List of wanna haves

[Mike Stein]

Some DVI pics from way back when we were exploring 3.5" disks:

Re: [M100] List of wanna haves

[Mike Stein]

> The reason for doing it is that we can. 

Ah, right, of course; I forgot ;-)
  - Original Message - 
  From: Gary Hammond 
  To: m...@bitchin100.com 
  Sent: Sunday, February 18, 2018 1:43 AM
  Subject: Re: [M100] List of wanna haves


  I had a go at using both 3.5" and 5.25" in the DVI at the same time. I was 
able to create a boot 3.5" boot disk and had it booting from the 3.5" drive. Of 
course the problem is that the format of the 3.5" disk bears no resemblance to 
the TPPD/TPPD2.

   

  The reason for doing it is that we can. Do we need any other reason?

   

  From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Mike Stein
  Sent: Sunday, 18 February 2018 6:52 PM
  To: m...@bitchin100.com
  Subject: Re: [M100] List of wanna haves

   

  It's been a long time, but IIRC there was no problem using the 3.5" disks; of 
course you didn't gain any capacity and they did still only store 360KB. Are 
any of the other folks who played with this still on the list by any chance?

   

  The 4-drive version shown was only a mockup IIRC, but I see no reason why it 
couldn't work with a couple of switches to switch between 5.25 and 3.5.

   

  Unfortunately I can't remember now why we did it... ;-)

   

 

Re: [M100] USB Power cord

[Mike Stein]

We had a lengthy discussion about this almost exactly 2 years ago. IIRC the 
bottom line was that the M100 would run happily on 5V without step-up 
conversion but whether you used a plain cable or a step-up adapter the problem 
was finding one with a center negative.

I think John H found one but I don't know if you could easily find one today; 
probably easier to just cut, reverse and resplice a center positive cable.

m
  - Original Message - 
  From: Kurt McCullum 
  To: m...@bitchin100.com 
  Sent: Wednesday, December 27, 2017 8:29 AM
  Subject: [M100] USB Power cord


  Does a USB step up power cord still exist that will provide 6v center 
negative with the proper plug? I know there was one available some time back 
but I thought I'd check. I have not seen one lately.

   

  Kurt

Re: [M100] Looking for the Barcode drivers on the 26-3846 cassette

[Mike Stein]

Hi Peter, glad we could help out!

I believe the 26-3846 already includes the DVI files for anyone who might 
need/want them and I only mentioned the -1183A for completeness in case someone 
out there has a copy; AFAIK there isn't a copy to be found anywhere.

Will try to collect the relevant manuals one of these days.

m
  - Original Message - 
  From: Peter Noeth 
  To: Mike Stein 
  Cc: Model 100 Discussion 
  Sent: Monday, December 25, 2017 7:41 PM
  Subject: Re: [M100] Looking for the Barcode drivers on the 26-3846 cassette


  Mike,


Deepest thanks to Rich Cini and yourself for the "digital Cassette" of RS 
26-3846. :-)


I down loaded the .WAV file, and after a few runs to get the volume right, 
I was able to load the files to the M102.   I will do some testing later in the 
week, and if I have any problems, I will let you know.


Since I  don't have (or ever intend on getting) the DVI, I will not need 
the DVI version cassette.




  Thanks again,


  Peter Noeth

Re: [M100] Looking for the Barcode drivers on the 26-3846 cassette

[Mike Stein]

Glad to hear that they all work; yes, the D suffix is for the DVI versions. 

I know what you mean about the original wand; they originally included a clear 
plastic strip to put under the wand to minimize wear but as you say, the beam 
is also a little weaker than some.

Always wanted to play with the 'CueCat' that RS gave away for a while; 
apparently they're fairly easy to modify but I never got around to it. Never in 
fact actually found a use for bar codes in my life other than playing around 
with it, although the port itself has some interesting uses.

I assume you don't urgently need the manual addendum that went with the 
supplementary drivers?

Anyway, enjoy!

m
  - Original Message - 
  From: Peter Noeth 
  To: Mike Stein 
  Cc: Model 100 Discussion 
  Sent: Wednesday, December 27, 2017 4:55 PM
  Subject: Re: [M100] Looking for the Barcode drivers on the 26-3846 cassette


  Mike,


I got the files to load and run: I2OF5, CDABR, UPCEAN and the basic demo 
program RDBC2


There were also a second set: I2OF5D, CDABRD, UPCEAD and the basic demo 
program RDBCD2


The second set I expected must be for the M200, as the HIMEM settings were 
lower in RAM (around 56888) than the original M100 set (around 61788). However 
in seeing your last response, these may have well been for use with the DVI 
(driver names end with "D").


I tested the M100 drivers and they all work. The UPCEAN driver reads UPC-A, 
UPC-E (both the single 6-digit code and the 6-digit code + the separated 
2-digit extension), EAN-8 and EAN-13.


I have the original RS Barcode wand, but for normal use, I use the more 
industrial Unitech MS120-NTCB00-SG as it has the sapphire tip that doesn't 
really ever wear. Although the LED remains ON all the time, it is brighter than 
the RS version (which was made by Hewlett Packard for the HP-41 calculator) and 
seems to be better at reading lo-contrast barcodes as are often common on soda 
cans.


The RS wand wears the plastic tip down with heavy use, which affects the 
focal distance of the LED beam, and it is not sealed so needs the dust blown 
out of it occasionally. Since replacement tips are not available, my RS wand 
stays in the original package.




  Thanks again,


  Peter 


  On Tue, Dec 26, 2017 at 3:22 PM, Mike Stein <mhs.st...@gmail.com> wrote:

Hi Peter, glad we could help out!

I believe the 26-3846 already includes the DVI files for anyone who might 
need/want them and I only mentioned the -1183A for completeness in case someone 
out there has a copy; AFAIK there isn't a copy to be found anywhere.

Will try to collect the relevant manuals one of these days.

m
  - Original Message - 
  From: Peter Noeth 
  To: Mike Stein 
  Cc: Model 100 Discussion 
  Sent: Monday, December 25, 2017 7:41 PM
  Subject: Re: [M100] Looking for the Barcode drivers on the 26-3846 
cassette


  Mike,


Deepest thanks to Rich Cini and yourself for the "digital Cassette" of 
RS 26-3846. :-)


I down loaded the .WAV file, and after a few runs to get the volume 
right, I was able to load the files to the M102.   I will do some testing later 
in the week, and if I have any problems, I will let you know.


Since I  don't have (or ever intend on getting) the DVI, I will not 
need the DVI version cassette.




  Thanks again,


  Peter Noeth

Re: [M100] Backup ROM

[Mike Stein]

Among the support files for the extRAM and XR4 'Poor man's REX' devices there 
are several programs to save/load option ROM images:

R2D - ROM to TPDD
ROMCOM - ROM to RS-232 (binary)
INTELO - ROM to RS-232 (ASCII Intel format)

http://www.club100.org/library/libeme.html

m
  - Original Message - 
  From: Rick Shear 
  To: m...@bitchin100.com 
  Sent: Friday, August 10, 2018 11:08 AM
  Subject: Re: [M100] Backup ROM


  That'll work.  Thanks!  In the mean time, I see Brian White has already 
extracted this ROM.  So, I likely won't need to do this anyway.  Might just 
give it a try to see if I can make it work anyway though.  


  On Fri, Aug 10, 2018 at 9:41 AM Fugu ME100  wrote:

You could try this utility 
http://www.club100.org/memfiles/index.php?===Steve%20Adolph/ROM2S
  It will dump the ROM as an ASCII HEX file to a TPDD device.  There are online 
utilities that can convert it to a binary file that could be loaded into a REX. 
 I have used it to read mystery OPTROMs that sometimes come with the eBay 
machines.  


However I believe some OPT ROMs have to be modified to work with the REX so 
the PSCG+ disk ‘might’ not work with the REX directly.  


Alternatively the OPTROM may already have been converted into a REX file 
which is worthwhile checking.  There is a validated list of OPTROM images on 
http://bitchin100.com/wiki/index.php?title=REX  Others might exist just need to 
check the archives.  


From: M100  on behalf of Rick Shear 

Reply-To: 
Date: Friday, August 10, 2018 at 3:20 AM
To: 
Subject: [M100] Backup ROM



  I have a Model 100 with a PSCG Disk+ ROM in it.  I am in the process of 
gathering all the parts to build a REX board and would like to back up the 
Disk+ ROM to install on the REX.  I've been trying to find a utility to back 
the ROM up from the Model 100 to a TPDD device.  Is there such a program 
available?  Or will I have to get/build an eprom reader to get the image?


  I found a program on club100 (ARTROM.CO) that would read the image and 
send it to an eprom burner, but I don't have one of those devices and really 
don't need to burn a copy to an eprom.




  Thanks for any pointers in the right direction.


  Rick

Re: [M100] Power on/off issues on M100

[Mike Stein]

Does the machine retain what was in memory through this power off-on cycle?

- Original Message - 
From: "Josh Malone" 
To: 
Sent: Monday, September 10, 2018 9:50 AM
Subject: Re: [M100] Power on/off issues on M100


> On Mon, Sep 10, 2018 at 9:32 AM Gregory McGill  
> wrote:
>>
>> Flakey memory power switch?
> 
> When I got the machine, I was initially suspicious of the memory power
> switch, so I cleaned it with alcohol.
> 
> However, if it were the memory power switch, why would it power up
> after the external power was removed and re-applied. Genuinely curious
> as to ways this could happen. I'm not familiar enough with the M100
> power circuit and I haven't had time to study the schematic like I'd
> hoped. :-/
> 
> -Josh

Re: [M100] call for programs and games

[Mike Stein]

Have you looked at:
http://bitchin100.com/wiki/index.php?title=Model_T_File_Transfer
Various transfer methods described there.

How about Club100.org?
http://www.club100.org/
Lots of programs there, including games:
http://www.club100.org/library/libgam.html

Note that files ending in .DO on that site are usually instructions; files 
ending in .BA are usually text versions of BASIC programs that you should 
rename to a .DO extension before loading them into the M100 (change the name if 
there already is a .DO file with the same name).

Some of the transfer servers will take care of this for you, but it's a good 
idea to check: if you open a .BA program and can actually read BASIC text then 
loading that file as is (without renaming to .DO) will almost certainly crash 
the computer.

m

  - Original Message - 
  From: Jesus R 
  To: m100@lists.bitchin100.com 
  Sent: Monday, September 10, 2018 6:12 PM
  Subject: [M100] call for programs and games


  Team, I now have: 1. Simple communication between my computer and my T100. 2. 
I can also save files from my T100 as WAV files and upload them to Google Docs 
for easy download on the go via a cell phone or computer. I only have a few 
programs and games to add to my database though. If you can send me your 
programs and games...I'll start adding them to my database so everyone can 
access them. The programs and games should be freeware / shareware.  


  Link to database: 
https://docs.google.com/spreadsheets/d/1m7QRN1I5KpJJO_RKYnwFhmrluDjbYm6bEe_rIgz80ug/edit?usp=sharing


  Please submit the following with your files:
  1. Author name
  2. Program name
  3. Genre: game, utility, etc.
  4. Year

Re: [M100] NEC Low battery light update

[Mike Stein]

Nice work!

I notice that Nickel-Zinc batteries are rarely mentioned in this sort of 
discussion; they do require somewhat different charging parameters but 
otherwise are pretty similar to NiCds, but with a 1.6V voltage instead of 1.2.

When it comes to rechargeable 1.5V alkalines my experience has been pretty 
disappointing but that may just be the brand I used; experience with NiCds and 
NiMHs has also been mixed.

m

- Original Message - 
From: "Kurt McCullum" 
To: 
Sent: Tuesday, June 26, 2018 12:06 PM
Subject: [M100] NEC Low battery light update


A couple weeks ago I was asking about the low battery light on my NEC when 
using rechargeable batteries. The problem was that after about 45 minutes the 
low battery light would come on because the voltage difference (1.2 vs 1.5) of 
Alkaline vs NiMh batteries. Originally I was going to look at the power supply 
itself to see if I could replace a resistor so that the light would come on at 
a lower voltage. I opted to leave the power supply alone and focus on the 
battery.

I bought ten 1/3AA NiMh batteries and built a battery pack. There are two banks 
of five 1/3AA batteries and two spacers(S1 & S2). The ending battery pack looks 
like this:
+-
|   S1 S2   |
| | | |
| | | |
 ------

S1 has a wire that goes to ground, and S2 has a wire going to positive.  The 
two 5 battery banks are in parallel and each bank has a capacity of 300mah, 
giving a total capacity of 600mah. The batteries that I took our of the 
original NiCd back were 500mah so it's very similar to the original which was 
rated to give 5.5 hours. I'm still testing but so far the battery light issue 
has gone away. I need to see how much time I have left once the low battery 
light comes on because rechargeable batteries fall off rather quickly.  Voltage 
on the pack is 6.4v when charged. Very similar to what new Alkaline batteries 
would give.

A Regular 4 battery NiMh battery pack has a much longer run time but the 
problem is that you never know when you are almost out of power. The low 
battery light is on almost the entire life of the battery.

I'll keep you posted on my testing results.

Kurt

Re: [M100] gps

[Mike Stein]

Mine is a Tripmate, which has a 9-pin RS-232 cable.
e.g.:

https://www.ebay.com/p/DeLorme-Tripmate-GPS-Receiver/140809409


- Original Message - 
From: "Peter Vollan" <dprogra...@gmail.com>
To: <m...@bitchin100.com>
Sent: Tuesday, January 23, 2018 2:09 PM
Subject: Re: [M100] gps


> Delorme Earthmate 9538 v1.0
> Wasn't that the one you used?
> I think maybe I could buy a serial cable instead of making one?
> 
> 
> 
> On 22 January 2018 at 21:23, Mike Stein <mhs.st...@gmail.com> wrote:
>> What are you using for the receiver?
>>
>> - Original Message -
>> From: "Peter Vollan" <dprogra...@gmail.com>
>> To: <m...@bitchin100.com>
>> Sent: Monday, January 22, 2018 8:56 PM
>> Subject: Re: [M100] gps
>>
>>
>>> ISTR that there was a webpage about it. Right now I need the pinout
>>> into to hack the serial cable together.
>>>
>>> The question of "why do this" has come up before as well. Let me worry
>>> about that one
>>>
>>>
>>> On 22 January 2018 at 13:58, Mike Stein <mhs.st...@gmail.com> wrote:
>>>> That might be me; we did have some discussions about the protocol etc. way 
>>>> back when and I did use the M100 with a Delorme Tripmate to log my trips 
>>>> for a while; fun and some interesting data, but not terribly useful in the 
>>>> end.
>>>>
>>>> I can't find any notes or programs at a fast look but it wasn't very 
>>>> complicated; just a matter of parsing the data stream into its various 
>>>> fields.
>>>>
>>>> I'll have another look around for anything from those days.
>>>>
>>>> m
>>>>
>>>> - Original Message -
>>>> From: "Peter Vollan" <dprogra...@gmail.com>
>>>> To: <m...@bitchin100.com>
>>>> Sent: Sunday, January 21, 2018 6:03 PM
>>>> Subject: [M100] gps
>>>>
>>>>
>>>>>A while back, years ago probably, someone detailed how they used a GPS
>>>>> unit with a serial connection to their Model 100. I went as far as
>>>>> acquiring the GPS unit and the connector for it to splice into a
>>>>> cable, then the project got stalled. Anyone know where I could find
>>>>> this info?
>

Re: [M100] diagnose

[Mike Stein]

Oops ;-)

I'd meant to ask whether you'd checked the various voltages on the display 
board (Vdd, V2, 3, 4, 5, 6, Vee).

m
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Tuesday, January 23, 2018 3:22 AM
  Subject: Re: [M100] diagnose


  Well I don't know what I'm looking yet, but it's fun playing with the 
analyzer.


  I rigged up a breakout for the lcd cable, passing all signals through 
normally, and tapping some for the analyzer.
  Started by tapping AD0-AD7 and PA0-PA7. Both these pics are the same 
motherboard from the bad unit. One with a good lcd board, one with the bad lcd 
board it came with.


  bad lcd
  https://photos.app.goo.gl/4QDlMt1YbEd6pQbl1



  good lcd
  https://photos.app.goo.gl/fpF9cxmsRVeueMUy2



  good times
  https://photos.app.goo.gl/QLV1mZsNqsu4eXkA2





  On Sun, Jan 21, 2018 at 1:05 AM, Brian White <bw.al...@gmail.com> wrote:

I finally tried one of the most basic diagnostic steps I should have done 
almost first, since I have the parts to do so. I tried swapping the 
motherboard, lcd, & keyboard boards around with those from a good M100.


The motherboard of the dead M100 turns out to be fine. Whatever the problem 
is, it's in the display board. (I eliminated the keyboard too)




On Sat, Dec 30, 2017 at 10:33 AM, Fugu ME100 <b4me...@hotmail.com> wrote:

  I would hold off desoldering the SRAM modules until it is established 
where the problem is located.  It could be one of the buffers driving those 
chips.  I believe someone already mentioned they had an issue with a buffer and 
had to replace it on their broken machine.  


  The CPU looks like it is doing the right things now it is a matter of 
tracing out the Address, data and control lines to make sure they are arriving 
at the ROM and SRAM correctly.  


  Since the machine was on battery power when the backup power was turn  
off the SRAMs would of been powered down while still being driven by the 
attached buffers.  So they would of been driven in a unpowered state which 
could of damaged their protection diodes causing a short or overloaded and 
damaged a buffer.  


  I was not aware of the different models I must have really early versions 
as they only have 1 SRAM module soldered in the other three are socketed – 
which is nice for debugging. :)  Thanks for that information I keep learning 
more about my machines. :)


  From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Mauro Pintus 
<mau...@tiscali.it>
  Reply-To: <m...@bitchin100.com>
  Date: Saturday, December 30, 2017 at 6:35 AM
  To: <m...@bitchin100.com>
  Subject: Re: [M100] diagnose



Yes, my Olivetti M10 has 3 soldered modules for a total of 24k plus a 
free socket for the optional one (see linked pictures below).


I'm gathering courage to desolder all the SRAMs and place a socket on 
the first position hoping that at least one module is fine. 


Mauro 





Inviato da iPhone

Il giorno Dec 30, 2017, alle ore 12:25, Jan Vanden Bossche 
<jan80...@yahoo.com> ha scritto:


  AFAIK, he's working on an Olivetti M-10...
  Nut, also AFAIK, the M-10 followed the same scheme as the M100.

  Greetings from the TyRannoSaurus
  Jan-80




------
  From: Mike Stein <mhs.st...@gmail.com>
  To: m...@bitchin100.com 
  Sent: Saturday, 30 December 2017, 6:53
  Subject: Re: [M100] diagnose



  They were different models:
  26-3801 M100, 8K + 24K optional 
  26-3802 M100, 24K + 8K optional
  26-3803 T102, 24K + 8K optional

  m
- Original Message - 
From: Brian White 
To: m...@bitchin100.com 
Sent: Saturday, December 30, 2017 12:44 AM
Subject: Re: [M100] diagnose






On Dec 29, 2017 11:53 PM, "Fugu ME100" <b4me...@hotmail.com> wrote:

  In the T102 and M100 there are SRAM modules that are plugged into 
sockets, I am not familiar with the M10, but these modules are easy to remove 
from the socket and do not need to be desoldered.




That's not necessarily true. If a particular unit was sold with 8k, 
then it has 1 module soldered, and 3 sockets. If a particular unit was sold 
with 24k, then it has 3 soldered modules and 1 socket. Same is true for both 
m100 and t102.


He most likely has to desolder 3 modules. I definitely do.
-- 
bkw










-- 

bkw






  -- 

  bkw

Re: [M100] M100 Numeric Arrays

[Mike Stein]

Something not right at your end; works fine for me.

Are you sure the DIM( isn't out of sequence or gets cancelled/reset somehow?

m
  - Original Message - 
  From: Peter Noeth 
  To: Model 100 Discussion 
  Sent: Saturday, January 13, 2018 10:10 PM
  Subject: [M100] M100 Numeric Arrays


  All,


Is it just me, or has anyone else had problems with M100 numeric arrays. I 
wanted to use a numeric array on my M102, but I keep getting a BS (Bad 
Subscript) when trying to access indexes over 10 on a single dimensioned array.


BASIC does not complain about DIM P(65) or DIM P%(65), but P(11)=22 gives a 
BS error. The book says arrays can be whatever size/dimensions that memory will 
allow, but only seems to accept indexes 0-10. The examples only use 10 as the 
index.


Is this another one of the documentation oversights? I don't remember 
reading about problems with this computer was in popular use. 


String arrays don't seem to have this problem, at least for singly 
dimensioned arrays anyway.


I guess I could set HIMEM and manipulate the array myself.




  Regards,


  Peter

[M100] Fw: M100 Numeric Arrays

[Mike Stein]

A CLEAR maybe?

- Original Message - 
From: Mike Stein 
To: m...@bitchin100.com 
Sent: Saturday, January 13, 2018 10:26 PM
Subject: Re: [M100] M100 Numeric Arrays


Something not right at your end; works fine for me.

Are you sure the DIM( isn't out of sequence or gets cancelled/reset somehow?

m
  - Original Message - 
  From: Peter Noeth 
  To: Model 100 Discussion 
  Sent: Saturday, January 13, 2018 10:10 PM
  Subject: [M100] M100 Numeric Arrays


  All,


Is it just me, or has anyone else had problems with M100 numeric arrays. I 
wanted to use a numeric array on my M102, but I keep getting a BS (Bad 
Subscript) when trying to access indexes over 10 on a single dimensioned array.


BASIC does not complain about DIM P(65) or DIM P%(65), but P(11)=22 gives a 
BS error. The book says arrays can be whatever size/dimensions that memory will 
allow, but only seems to accept indexes 0-10. The examples only use 10 as the 
index.


Is this another one of the documentation oversights? I don't remember 
reading about problems with this computer was in popular use. 


String arrays don't seem to have this problem, at least for singly 
dimensioned arrays anyway.


I guess I could set HIMEM and manipulate the array myself.




  Regards,


  Peter

Re: [M100] gps

[Mike Stein]

That might be me; we did have some discussions about the protocol etc. way back 
when and I did use the M100 with a Delorme Tripmate to log my trips for a 
while; fun and some interesting data, but not terribly useful in the end.

I can't find any notes or programs at a fast look but it wasn't very 
complicated; just a matter of parsing the data stream into its various fields.

I'll have another look around for anything from those days.

m

- Original Message - 
From: "Peter Vollan" 
To: 
Sent: Sunday, January 21, 2018 6:03 PM
Subject: [M100] gps


>A while back, years ago probably, someone detailed how they used a GPS
> unit with a serial connection to their Model 100. I went as far as
> acquiring the GPS unit and the connector for it to splice into a
> cable, then the project got stalled. Anyone know where I could find
> this info?

Re: [M100] diagnose

[Mike Stein]

  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Tuesday, January 23, 2018 3:22 AM
  Subject: Re: [M100] diagnose


  Well I don't know what I'm looking yet, but it's fun playing with the 
analyzer.


  I rigged up a breakout for the lcd cable, passing all signals through 
normally, and tapping some for the analyzer.
  Started by tapping AD0-AD7 and PA0-PA7. Both these pics are the same 
motherboard from the bad unit. One with a good lcd board, one with the bad lcd 
board it came with.


  bad lcd
  https://photos.app.goo.gl/4QDlMt1YbEd6pQbl1



  good lcd
  https://photos.app.goo.gl/fpF9cxmsRVeueMUy2



  good times
  https://photos.app.goo.gl/QLV1mZsNqsu4eXkA2





  On Sun, Jan 21, 2018 at 1:05 AM, Brian White <bw.al...@gmail.com> wrote:

I finally tried one of the most basic diagnostic steps I should have done 
almost first, since I have the parts to do so. I tried swapping the 
motherboard, lcd, & keyboard boards around with those from a good M100.


The motherboard of the dead M100 turns out to be fine. Whatever the problem 
is, it's in the display board. (I eliminated the keyboard too)




On Sat, Dec 30, 2017 at 10:33 AM, Fugu ME100 <b4me...@hotmail.com> wrote:

  I would hold off desoldering the SRAM modules until it is established 
where the problem is located.  It could be one of the buffers driving those 
chips.  I believe someone already mentioned they had an issue with a buffer and 
had to replace it on their broken machine.  


  The CPU looks like it is doing the right things now it is a matter of 
tracing out the Address, data and control lines to make sure they are arriving 
at the ROM and SRAM correctly.  


  Since the machine was on battery power when the backup power was turn  
off the SRAMs would of been powered down while still being driven by the 
attached buffers.  So they would of been driven in a unpowered state which 
could of damaged their protection diodes causing a short or overloaded and 
damaged a buffer.  


  I was not aware of the different models I must have really early versions 
as they only have 1 SRAM module soldered in the other three are socketed – 
which is nice for debugging. :)  Thanks for that information I keep learning 
more about my machines. :)


  From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Mauro Pintus 
<mau...@tiscali.it>
  Reply-To: <m...@bitchin100.com>
  Date: Saturday, December 30, 2017 at 6:35 AM
  To: <m...@bitchin100.com>
  Subject: Re: [M100] diagnose



Yes, my Olivetti M10 has 3 soldered modules for a total of 24k plus a 
free socket for the optional one (see linked pictures below).


I'm gathering courage to desolder all the SRAMs and place a socket on 
the first position hoping that at least one module is fine. 


Mauro 





Inviato da iPhone

Il giorno Dec 30, 2017, alle ore 12:25, Jan Vanden Bossche 
<jan80...@yahoo.com> ha scritto:


  AFAIK, he's working on an Olivetti M-10...
  Nut, also AFAIK, the M-10 followed the same scheme as the M100.

  Greetings from the TyRannoSaurus
  Jan-80




------
  From: Mike Stein <mhs.st...@gmail.com>
  To: m...@bitchin100.com 
  Sent: Saturday, 30 December 2017, 6:53
  Subject: Re: [M100] diagnose



  They were different models:
  26-3801 M100, 8K + 24K optional 
  26-3802 M100, 24K + 8K optional
  26-3803 T102, 24K + 8K optional

  m
- Original Message - 
From: Brian White 
To: m...@bitchin100.com 
Sent: Saturday, December 30, 2017 12:44 AM
Subject: Re: [M100] diagnose






On Dec 29, 2017 11:53 PM, "Fugu ME100" <b4me...@hotmail.com> wrote:

  In the T102 and M100 there are SRAM modules that are plugged into 
sockets, I am not familiar with the M10, but these modules are easy to remove 
from the socket and do not need to be desoldered.




That's not necessarily true. If a particular unit was sold with 8k, 
then it has 1 module soldered, and 3 sockets. If a particular unit was sold 
with 24k, then it has 3 soldered modules and 1 socket. Same is true for both 
m100 and t102.


He most likely has to desolder 3 modules. I definitely do.
-- 
bkw










-- 

bkw






  -- 

  bkw

Re: [M100] batteries...

[Mike Stein]

Just curious: why?

A good quality replacement would probably last at least another ten years.

m
  - Original Message - 
  From: Kurt McCullum 
  To: m...@bitchin100.com 
  Sent: Friday, March 09, 2018 10:07 AM
  Subject: Re: [M100] batteries...


  I run my 200 without a backup battery. It doesn’t hurt anything to run that 
way. But you have to be careful not to lose memory contents when changing 
batteries. I keep mine plugged into the AC adapter when I do. Just not as easy 
as with a backup battery.

   

  Kurt

   

  From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of Chris Kmiec
  Sent: Friday, March 09, 2018 2:34 AM
  To: m...@bitchin100.com
  Subject: Re: [M100] batteries...

   

  Sorry, I meant why not just remove it. That's what I did with all my Tandys.

   

  On Mar 8, 2018 9:10 PM, "John R. Hogerhuis"  wrote:

The reason for replacing the internal nicd is that they’re 20+ years old.  

 

They are in the process of failing and leaking corrosive material on the 
printed circuit board damaging it. 

 

— John. 

Re: [M100] DVI cable for 102

[Mike Stein]

Pretty good writeup here:

http://tandy.wiki/Disk/Video_Interface:_Cable
  - Original Message - 
  From: Chris Kmiec 
  To: m...@bitchin100.com 
  Sent: Monday, March 12, 2018 7:44 AM
  Subject: [M100] DVI cable for 102


  Just snagged a DVI off of eBay, and my understanding is that it needs a 
different cable between 100 and 102. Since the auction has a 100 bundled, I 
want to get/make the right cable for my 102s. Does anyone have instructions, 
info, etc on how to do so? Or a place where I can buy one?


  Thanks!

Re: [M100] DVI duplication

[Mike Stein]

l ram image backup/restore utilities other than 
what's built-in to REX and the bank-switching feature of QUAD and PG Design ram 
upgrade hardware. But I assume there is something. I guess TBACK is that?

  -- 

  bkw





  On Mon, Feb 26, 2018 at 5:31 PM, Mike Stein <mhs.st...@gmail.com> wrote:

I don't see anything wrong with using modern intelligent peripherals; I 
used a dedicated MS-DOS laptop to put the M100's display on an LCD TV over the 
serial port.

I guess the simplest would be for someone with a DVI to configure the 
M100 and then dump RAM using TBACK or similar; you could then load that 
configuration into your M100.

Maybe Brian can do that since it sounds like his DVI is readily 
available; if not I could do it but not for a while.

m


- Original Message -
From: "VANDEN BOSSCHE JAN" <jan.vandenboss...@vivaqua.be>
To: <m...@bitchin100.com>
Sent: Monday, February 26, 2018 5:13 PM
Subject: [M100] DVI duplication


> Hello,
>
> Despite that some disagree about using a periferal device, more 
intelligent than the Model T itself, I do want to continue to see if I can use 
a Raspberry Pi to act as such.
>
> In order to be able to investigate the possibility of the duplication 
of the DVI video-out function via a Raspberry Pi, I'd need a way to load the 
drivers to a Model T. So far, and AFAIK, there's only one way to do that: with 
a DVI. I don't have one. Is there a way to emulate this, or another way to 
inject the drivers in the Model T ?
>
> Mij jaag
> je niet zo
> gemakkelijk weg.
> Jan-80
> VIVAQUA et HYDROBRU ont fusionné.
> VIVAQUA est votre société d'eau en Région de Bruxelles-Capitale.
>
> VIVAQUA en HYDROBRU zijn gefusioneerd.
> VIVAQUA is uw waterbedrijf in het Brusselse Hoofdstedelijk Gewest.
>
> [http://www.vivaqua.be/facebook.png] Rejoignez-nous sur Facebook - 
Volg ons op Facebook
>
> DISCLAIMER
> Pensez à l'environnement, n'imprimez cette page et ses annexes que si 
c'est nécessaire. Ce message électronique, y compris ses annexes, est 
confidentiel et réservé à l’attention de son destinataire.  Si vous n'êtes pas 
le destinataire de ce message, merci de le détruire et d’en informer 
l’expéditeur. Toute divulgation, copie ou utilisation de ce mail est dans ce 
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électroniques ne peuvent être garanties.
> Denk aan het milieu; druk deze pagina en de bijlagen alleen af als 
het nodig is. Dit e-mailbericht (inclusief zijn bijlagen) is vertrouwelijk en 
is uitsluitend bestemd voor de geadresseerde. Als dit bericht niet voor u 
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gebruiken. We kunnen niet garanderen dat de gegevensoverdracht via het internet 
veilig en nauwkeurig is.
>





  -- 

  bkw




-- 

bkw

Re: [M100] batteries...

[Mike Stein]

Tandy Service ManualAgreed.

There are some differences between NiCd and NiMH charging recommendations, but 
according to the Panasonic literature the standby Trickle charging currents are 
exactly the same.

m
  - Original Message - 
  From: Fugu ME100 
  To: m...@bitchin100.com 
  Sent: Monday, March 12, 2018 4:21 PM
  Subject: Re: [M100] batteries...


  Where is that stated about Trickle Charging,  I don’t see it in the M102 
manual?


  I can find the section on pg 1-7 where it says "Charging current 1.2mA 
(typ)".   Which is in line with an average current however it will vary 
considerably depending on charge state of the battery.  Fully charged the 
current will be 300uA it cannot be more.   


  So the impact will be well below any but the worst quality batteries – which 
may have other issues :) 


  From: M100  on behalf of George Michael 
Rimakis 
  Reply-To: 
  Date: Monday, March 12, 2018 at 12:11 PM
  To: 
  Subject: Re: [M100] batteries...



The M102 service manual says the trickle charge is at 1.2mA, and some 
batteries may not be as tolerant.


On Mon, Mar 12, 2018 at 3:54 PM, Fugu ME100  wrote:

  I swapped to NiMH for my replacements mainly because NiCd was hard to 
find.  Before doing so I did some research on manufacturer recommendations.  
This doc is pretty good 
http://data.energizer.com/pdfs/nickelmetalhydride_appman.pdf  If you look at 
the Recommended Charging Rates section (pg 11) it gives this recommendation on 
trickle charging:


  'Finally a maintenance (or trickle) charge rate of less than 0.025C 
(C/40) is recommended. The use of very small trickle charges is preferred to 
reduce the negative effects overcharging.’


  The NiMH and NiCd self-discharge very badly so if the trickle charge < 
self discharge rate things should be fine.  


  Looking at the charge circuit on the M100 it is basically a series diode, 
resistor (1.8K) and the battery.  If the battery is at 0V the max current is 
~2mA,  at full charge (3.7V) the current is ~300uA.   Based on the 
recommendations of Energizer the charge should be  on behalf of George 
Michael Rimakis 
  Reply-To: 
  Date: Monday, March 12, 2018 at 10:10 AM
  To: 
  Subject: Re: [M100] batteries...



The thing about NiMH, is the level of trickle charge that they can 
tolerate is a bit less than NiCD. Might not be good in the long run.


On Fri, Mar 9, 2018 at 5:00 PM, Jim Anderson  
wrote:

  > -Original Message-
  >
  > This brings up an interesting point.  Having just replaced my NiCad 
I
  > think I'm going to use my label maker to leave a note about when it 
was
  > replaced under the battery door.

  I like to do this anyway (and not just with m100s), because I find 
myself struggling to remember later which machines have which things replaced, 
and when they were done...







  jim

Re: [M100] DVI cable for 102

[Mike Stein]

Where did you read about a two-part 100 cable?

Nice pictures but it's hard to tell how many cables there are, what connector 
belongs to which cable, and how you're connecting them.

Does the cable with the male plug that plugs into the 102 and 200 have the 
swapped wires as shown in Brian's Wiki?

m
  - Original Message - 
  From: Chris Kmiec 
  To: m...@bitchin100.com 
  Sent: Thursday, March 15, 2018 7:20 AM
  Subject: Re: [M100] DVI cable for 102


  Looks like what I thought was a 102 cable was just the two-part 100 cable. I 
guess reading helps...






  On Thu, Mar 15, 2018 at 6:02 AM, Chris Kmiec  wrote:

OK, I think I spoke too soon. The DVI is working fine, but I can't get any 
of my 102s to respond, connected to that cable. 


The 100 that came with the DVI has a cable glued on to the bottom from the 
system socket, and same type of connector on the other end as 102 system bus. 
When I connect the 102-looking cable from the DVI and the cable on the 100 
together, everything works together.


I guess I still need a cable for the 102...


On Wed, Mar 14, 2018 at 7:55 PM, Chris Kmiec  wrote:

  :) Ok, maybe not 50, but I'll take some. Here are a few while I'm working 
on cleaning it:


  https://1drv.ms/f/s!AiOtw8Sr4zlvgaBRTB4K9WCxOOmoeQ



  On Tue, Mar 13, 2018 at 10:39 PM, Brian White  wrote:

Can you take about 50 very clear pictures of both cables and connectors 
please? :)


We have the info to create new cables that function, but I still would 
really like to see the details of the original cables & connectors up close and 
clear just for reference.


-- 
bkw


On Tue, Mar 13, 2018, 10:07 PM Chris Kmiec  wrote:

  Ok, I'm in Tandy 100 heaven right now :) Just got my eBay package, 
and despite horrendous packaging, everything survived. Taking inventory, I got 
a beautiful looking DVI, manual, disk BASIC on 5 1/4" disk, and BOTH cables, 
one for 100 and one for 102! Almost afraid to turn it on, but that will have to 
wait until tomorrow when I have a minute to myself...


  On Mon, Mar 12, 2018 at 9:57 AM, Brian White  
wrote:

The strain relief clip specifically I mean, when you snap all 3 
parts of an idc connector together with no cable, the strain relief bar forms a 
thin slot exactly the size and shape to fit a ribbon cable through.


I use that to flip 2 wires over, inser into slot, flip next 2 
wires, insert into slot, ... until all 20 pairs are in the slot. Then get them 
all into the male connector and crimp it. Then pick apart, or just break off 
the female connector that was just used as a jig to hold the wires in place.


-- 
bkw


On Mon, Mar 12, 2018, 10:50 AM Brian White  
wrote:

  http://tandy.wiki/Disk/Video_Interface


  It's a pain but it's doable.


  The pictures there don't show the process, only the final result 
unfortunately. I used a sacrificial 40pin female idc connector with the strain 
relief clip as a guide to hold all the split & twisted  wires into a flat 
ribbon so that you can get them all arranged into the male 40pin idc connector. 
I use a Panavise to crimp, not any official crimping tool.


  But by clicking on the pics to get the full size ones, you can 
see what you need to do.


  On Mon, Mar 12, 2018, 7:44 AM Chris Kmiec  
wrote:

Just snagged a DVI off of eBay, and my understanding is that it 
needs a different cable between 100 and 102. Since the auction has a 100 
bundled, I want to get/make the right cable for my 102s. Does anyone have 
instructions, info, etc on how to do so? Or a place where I can buy one?


Thanks!

Re: [M100] 8K RAM Chip

[Mike Stein]

Yeah, there are a number of ways to deal with the non-standard RAM modules in 
an M100; the pin spacing of the modules is .75 instead of the standard .60, so 
you will probably have to make a little adapter board in any case.

A self-contained module has to combine the four discrete chip selects into one, 
and also re-encode them into the binary upper two addresses. There are various 
ways of doing that and I have some of the commercial circuits somewhere but 
can't find them at the moment.

One way would be a priority encoder as Fugu suggests. His 32K idea is clever 
and you could just used diodes to combine the chip selects; as a matter of fact 
you can also use an 8K chip and use diodes for the encoding instead of the 
encoder IC.
FWIW, the Sony modules use two chips, a 4025 and a 4011.

If you don't mind connecting to or modding the main board there are also a 
number of options, including replacing all 4 RAM chips with one 32K chip; Steve 
Adolph has a good writeup about that:
http://www.club100.org/memfiles/index.php?=0==Steve%20Adolph/mods_to_upgrade_ram

m

  - Original Message - 
  From: Fugu ME100 
  To: m...@bitchin100.com 
  Sent: Wednesday, March 14, 2018 5:14 PM
  Subject: Re: [M100] 8K RAM Chip


  If you did not want to use the Libero method you could use a 74HC148 (or 
similar) 8 to 3 line priority decoder and put the 4 CSx- lines into the upper 
or lower 4 inputs of the ‘148. That would recreate 2 address lines and a new 
CS- for the 8Kx8 SRAM.  It could all mount on a proto-board and not require any 
'soldering to' the M100 :)  I would guess the NEC board uses a similar method 
but with an HC149 8-to-8 line priority encoder. 


  Alternatively use a 32Kx8 SRAM and waste 3/4 of the space, but it would still 
need the CSx- lines ANDed to generate the SRAM CS-. Again no soldering on the 
M100 required.  






  From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Mike Stein 
<mhs.st...@gmail.com>
  Reply-To: <m...@bitchin100.com>
  Date: Wednesday, March 14, 2018 at 12:19 PM
  To: <m...@bitchin100.com>
  Subject: Re: [M100] 8K RAM Chip



It needs more than just remapping the signals; the required upper two 
address lines are not available on the sockets so you either need to add logic 
to recreate them or modify the main board.

m
  - Original Message - 
  From: Gregory McGill 
  To: m...@bitchin100.com 
  Sent: Wednesday, March 14, 2018 1:22 PM
  Subject: Re: [M100] 8K RAM Chip


  thanks! It seems like we should be able to use the 8x8 chip from the 102 
with some kludging of lines.. they are pretty close.. 


  Greg


  On Wed, Mar 14, 2018 at 10:08 AM, Brian White <bw.al...@gmail.com> wrote:

There are at least a few different "build your own ram upgrade" 
articles on club100 and other archives of old forum posts, and in magazines too 
I think but those are hard to search. 


Here's one that is not one of the old original ones I was thinking of, 
but looks ok.


http://digilander.libero.it/rar2k/TRS80/Memory24k.html



I have some NEC modules that work that I assume must have originally 
been meant for nec 8201a. They are a little pcb with a single ram chip and an 
additional chip probably a decoder of some sort to consume 4 chip-enable lines. 
I could take some photos of it and maybe it's circuit could be reverse 
engineered from that.


https://photos.app.goo.gl/ZQle2id7AMWdX2bC3



Another option is QUAD, which is a thing that installs in the bus 
socket and displaces the internal ram with it's own full 32K, plus 3 more banks 
of 32K that you can switch between. Although you can't get a quad right now. 
Steven Adolph is testing his latest revision of the design and it's in between 
right now. He found problems with the old version and so removed it from 
oshpark, and th new version is not yet verified.


But assuming that comes along sooner or later, that would upgrade you 
to 32K the same as if you had installed all 4 possible modules inside.


-- 
bkw






On Wed, Mar 14, 2018, 11:14 AM Gregory McGill <arcadeshop...@gmail.com> 
wrote:

  ok is there a source for the 100 chips? or a pcb? 


  Greg


  On Wed, Mar 14, 2018 at 12:02 AM, Fugu ME100 <b4me...@hotmail.com> 
wrote:

Just the 102,  it uses a standard pin out. The 100 uses a special 
RAM module.


From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Gregory 
McGill <arcadeshop...@gmail.com>
Reply-To: <m...@bitchin100.com>
Date: Tuesday, March 13, 2018 at 10:58 PM
To: <m...@bitchin100.com>
Subject: Re: [M100] 8K RAM Chip



  oh wait these are 32x8 :)  are these ones on ebay for the 100 or 
102? or both? 


  Greg


  On Fri, Mar 9, 2018 at 7:33 PM, Gregory McGill 
<

Re: [M100] 8K RAM Chip

[Mike Stein]

Hi Frank,

How about we split the difference and settle on .73"? Try putting a 16-pin DIP 
(which should be .700" end to end) into a RAM module socket sideways and I 
think you'll find that it's a little too short; if you use .1" perfboard you'll 
have to bend the pins a bit.

In any case, the socket spacing is at least .100" wider than the RAM chip.

As to using diodes, I've often used this technique but I must confess that I 
never measured the standby current. But I don't quite see why that should keep 
it out of the standby region; with a pull-up resistor and no selects pulling 
down the diodes /CE should be at Vcc.

Also, at least one of the commercial modules used diodes, so perhaps it depends 
on the RAM chip; some experimentation might be in order.

m



- Original Message - 
From: "Francesco Messineo" <francesco.messi...@gmail.com>
To: <m...@bitchin100.com>
Sent: Thursday, March 15, 2018 1:27 PM
Subject: Re: [M100] 8K RAM Chip


On Thu, Mar 15, 2018 at 6:08 PM, Mike Stein <mhs.st...@gmail.com> wrote:
> Yeah, there are a number of ways to deal with the non-standard RAM modules
> in an M100; the pin spacing of the modules is .75 instead of the standard
> .60, so you will probably have to make a little adapter board in any case.
>
spacing is actually 700 mils

> A self-contained module has to combine the four discrete chip selects into
> one, and also re-encode them into the binary upper two addresses. There are
> various ways of doing that and I have some of the commercial circuits
> somewhere but can't find them at the moment.
>
> One way would be a priority encoder as Fugu suggests. His 32K idea is clever
> and you could just used diodes to combine the chip selects; as a matter of
> fact you can also use an 8K chip and use diodes for the encoding instead of
> the encoder IC.

A word of warning about using diodes to combine the selects: all the
low power cmos rams need close to Vdd or Vss levels on the select to
have the lowest current consumption when in sleep mode (Vdd circa 3V
inside the M100).
If the ram chip doesn't go in the correct standby mode, the internal
battery of the M100 is drained in about one day instead of the usual
one month (tests done in my Olivetti M10 several times).


Frank
>
> - Original Message -
> From: Fugu ME100
> To: m...@bitchin100.com
> Sent: Wednesday, March 14, 2018 5:14 PM
> Subject: Re: [M100] 8K RAM Chip
>
> If you did not want to use the Libero method you could use a 74HC148 (or
> similar) 8 to 3 line priority decoder and put the 4 CSx- lines into the
> upper or lower 4 inputs of the ‘148. That would recreate 2 address lines and
> a new CS- for the 8Kx8 SRAM.  It could all mount on a proto-board and not
> require any 'soldering to' the M100 :)  I would guess the NEC board uses a
> similar method but with an HC149 8-to-8 line priority encoder.
>
> Alternatively use a 32Kx8 SRAM and waste 3/4 of the space, but it would
> still need the CSx- lines ANDed to generate the SRAM CS-. Again no soldering
> on the M100 required.
>
>
>
> From: M100 <m100-boun...@lists.bitchin100.com> on behalf of Mike Stein
> <mhs.st...@gmail.com>
> Reply-To: <m...@bitchin100.com>
> Date: Wednesday, March 14, 2018 at 12:19 PM
> To: <m...@bitchin100.com>
> Subject: Re: [M100] 8K RAM Chip
>
> It needs more than just remapping the signals; the required upper two
> address lines are not available on the sockets so you either need to add
> logic to recreate them or modify the main board.
>
> m
>
> - Original Message -
> From: Gregory McGill
> To: m...@bitchin100.com
> Sent: Wednesday, March 14, 2018 1:22 PM
> Subject: Re: [M100] 8K RAM Chip
>
> thanks! It seems like we should be able to use the 8x8 chip from the 102
> with some kludging of lines.. they are pretty close..
>
> Greg
>
> On Wed, Mar 14, 2018 at 10:08 AM, Brian White <bw.al...@gmail.com> wrote:
>>
>> There are at least a few different "build your own ram upgrade" articles
>> on club100 and other archives of old forum posts, and in magazines too I
>> think but those are hard to search.
>>
>> Here's one that is not one of the old original ones I was thinking of, but
>> looks ok.
>>
>> http://digilander.libero.it/rar2k/TRS80/Memory24k.html
>>
>> I have some NEC modules that work that I assume must have originally been
>> meant for nec 8201a. They are a little pcb with a single ram chip and an
>> additional chip probably a decoder of some sort to consume 4 chip-enable
>> lines. I could take some photos of it and maybe it's circuit could be
>> reverse engineered from that.
>>
>> https://photos.app.goo.gl/ZQle2id7AMWdX2bC3
>>
>> Another optio

Re: [M100] DVI cable for 102

[Mike Stein]

Agreed; we need better pictures ;-)

And yes, the insert is definitely confusing.

But what's also confusing is that it sounds like it works with an M100 with 
both cables connected together. I don't see any twists, so I wonder if maybe 
someone modified the 102/200 cable to remove the twists and turn it into an 
M100 extension; in that case both cables connected together would work in an 
M100 but the 102/200 part would not work on the 102.

(I think; now *I* am getting confused... ;-)

m

  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Thursday, March 15, 2018 5:45 PM
  Subject: Re: [M100] DVI cable for 102


  Ah, looking at that insert again, I realize it gives all the answers, except, 
looking longer, it seems to give wrong answers that don't add up.


  1) The 2-part cable came with the 200-compatible system disk, and they both 
came together as their own package.


  2) The drawing seems to say that these are really just two separate cables, 
not a single two-part cable, and the written directions seem to agree, it's 
just that they don't quite say it straight out simply like that. But if you do 
what they say, it ends up resolving out to that.


  It's just confusing because of several things:


  * The cables might have shipped connected together, according to the written 
directions.

  * The drawing looks like one cable with a break with connectors that mate, 
the drawing isn't clear enough to show that "the blue connector" doesn't 
actually look the same or fit into that other cable right next to it.

  * The directions actually say "the special two-part cable included".



  So, I *think* this is not a two-part cable at all, just simply plain old, two 
different cables to work with two different models of computer.

  One cable is for 102 & 200, the other cable is for 100, and that's it, the 
cables are never supposed to be connected to each other.


  Which is why I'd really like to see some clear full close pics of the cables 
and connectors from different angles, because if this is true, then there 
should be some funky twists in the wires somewhere, or else these are funky 
connectors that don't map the wires to the pins the same way every other 
connector in the world does at least today.





  On Thu, Mar 15, 2018 at 5:17 PM, Brian White <bw.al...@gmail.com> wrote:

There is a single sheet insert that came with one of my DVI manuals that 
shows a two-part cable, where I think the deal is there's really 3 total parts, 
one for 100, one for 102 & 200, and one for the DVI.

I scanned it and uploaded it to Archive.org a few weeks ago. It's a little 
paper about the size of a paperback book. Perhaps these came later along with 
the 100/200 version of the system disk? Maybe the mid-way connector performs 
the twists?

https://archive.org/details/DVI263806Notice


I too would like specifically more and clearer pictures of the cables, 
especially the connectors. Not the DVI itself. There are lot's of DVI's out 
there and I have 2 myself. But the original cables are mostly gone and there 
are not really even any pictures of the cables and connectors that are good 
enough to trace the conductors right to the pins, and see all possible 
manufacturing marks, like you could if you had one in your hands one in your 
hands.




On Thu, Mar 15, 2018 at 12:43 PM, Mike Stein <mhs.st...@gmail.com> wrote:

  Where did you read about a two-part 100 cable?

  Nice pictures but it's hard to tell how many cables there are, what 
connector belongs to which cable, and how you're connecting them.

  Does the cable with the male plug that plugs into the 102 and 200 have 
the swapped wires as shown in Brian's Wiki?

  m
- Original Message - 
From: Chris Kmiec 
To: m...@bitchin100.com 
Sent: Thursday, March 15, 2018 7:20 AM
Subject: Re: [M100] DVI cable for 102


Looks like what I thought was a 102 cable was just the two-part 100 
cable. I guess reading helps... 






On Thu, Mar 15, 2018 at 6:02 AM, Chris Kmiec <ckmi...@gmail.com> wrote:

  OK, I think I spoke too soon. The DVI is working fine, but I can't 
get any of my 102s to respond, connected to that cable.  


  The 100 that came with the DVI has a cable glued on to the bottom 
from the system socket, and same type of connector on the other end as 102 
system bus. When I connect the 102-looking cable from the DVI and the cable on 
the 100 together, everything works together.


  I guess I still need a cable for the 102...


  On Wed, Mar 14, 2018 at 7:55 PM, Chris Kmiec <ckmi...@gmail.com> 
wrote:

:) Ok, maybe not 50, but I'll take some. Here are a few while I'm 
working on cleaning it: 


https://1drv.ms/f/s!AiOtw8Sr4zlvgaBRTB4K9WCxOOmoeQ



On Tue, Mar 13, 2018 at 10:39 PM, Brian White <bw.al...@

Re: [M100] DVI cable for 102

[Mike Stein]

A *third*cable?!?

Do any of them have twisted pairs like this or are they all straight through by 
any chance?:






- Original Message - 
  From: Chris Kmiec 
  To: m...@bitchin100.com 
  Sent: Thursday, March 15, 2018 8:24 PM
  Subject: Re: [M100] DVI cable for 102


  Ok, I'll get serious with the pictures tomorrow or Saturday.


  What I have is one cable that's attached to m100, with a custom trap door for 
the system socket, and that cable is just long enough to stick out 1/4 inch out 
past the back. 


  I have a second cable that connects to that cable, then to the DVI. Together 
they are only slightly longer than the 3rd cable - from m100 socket to DVI.


  On Mar 15, 2018 5:36 PM, "Mike Stein" <mhs.st...@gmail.com> wrote:

Agreed; we need better pictures ;-)

And yes, the insert is definitely confusing.

But what's also confusing is that it sounds like it works with an M100 with 
both cables connected together. I don't see any twists, so I wonder if maybe 
someone modified the 102/200 cable to remove the twists and turn it into an 
M100 extension; in that case both cables connected together would work in an 
M100 but the 102/200 part would not work on the 102.

(I think; now *I* am getting confused... ;-)

m

  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Thursday, March 15, 2018 5:45 PM
  Subject: Re: [M100] DVI cable for 102


  Ah, looking at that insert again, I realize it gives all the answers, 
except, looking longer, it seems to give wrong answers that don't add up.


  1) The 2-part cable came with the 200-compatible system disk, and they 
both came together as their own package.


  2) The drawing seems to say that these are really just two separate 
cables, not a single two-part cable, and the written directions seem to agree, 
it's just that they don't quite say it straight out simply like that. But if 
you do what they say, it ends up resolving out to that.


  It's just confusing because of several things:


  * The cables might have shipped connected together, according to the 
written directions.

  * The drawing looks like one cable with a break with connectors that 
mate, the drawing isn't clear enough to show that "the blue connector" doesn't 
actually look the same or fit into that other cable right next to it.

  * The directions actually say "the special two-part cable included".



  So, I *think* this is not a two-part cable at all, just simply plain old, 
two different cables to work with two different models of computer.

  One cable is for 102 & 200, the other cable is for 100, and that's it, 
the cables are never supposed to be connected to each other.


  Which is why I'd really like to see some clear full close pics of the 
cables and connectors from different angles, because if this is true, then 
there should be some funky twists in the wires somewhere, or else these are 
funky connectors that don't map the wires to the pins the same way every other 
connector in the world does at least today.





  On Thu, Mar 15, 2018 at 5:17 PM, Brian White <bw.al...@gmail.com> wrote:

There is a single sheet insert that came with one of my DVI manuals 
that shows a two-part cable, where I think the deal is there's really 3 total 
parts, one for 100, one for 102 & 200, and one for the DVI.

I scanned it and uploaded it to Archive.org a few weeks ago. It's a 
little paper about the size of a paperback book. Perhaps these came later along 
with the 100/200 version of the system disk? Maybe the mid-way connector 
performs the twists?

https://archive.org/details/DVI263806Notice


I too would like specifically more and clearer pictures of the cables, 
especially the connectors. Not the DVI itself. There are lot's of DVI's out 
there and I have 2 myself. But the original cables are mostly gone and there 
are not really even any pictures of the cables and connectors that are good 
enough to trace the conductors right to the pins, and see all possible 
manufacturing marks, like you could if you had one in your hands one in your 
hands.




    On Thu, Mar 15, 2018 at 12:43 PM, Mike Stein <mhs.st...@gmail.com> 
wrote:

  Where did you read about a two-part 100 cable?

  Nice pictures but it's hard to tell how many cables there are, what 
connector belongs to which cable, and how you're connecting them.

  Does the cable with the male plug that plugs into the 102 and 200 
have the swapped wires as shown in Brian's Wiki?

  m
- Original Message - 
From: Chris Kmiec 
To: m...@bitchin100.com 
Sent: Thursday, March 15, 2018 7:20 AM
Subject: Re: [M100] DVI cable for 102


Looks like what I thought was a 102 cable was just the two-part 100 
cable. I guess 

Re: [M100] 8K RAM Chip

[Mike Stein]

Indeed. As a matter of fact there's a lot more to it in an M100: not only is 
the pinout substantially different and the required signals are not even all 
directly available, but even the pin spacing is not standard.
 
For an M100 you definitely need an adapter with some extra logic in addition to 
the RAM chip.

m

- Original Message - 
From: "Ken Pettit" 
To: 
Sent: Friday, March 09, 2018 9:11 PM
Subject: Re: [M100] 8K RAM Chip


> All,
> 
> Those $3 chips work fine in the Model 102, but I believe the pinout for 
> M100 RAM expansion is slightly different and doesn't plug in directly.  
> I would have to double check, but I recall the SRAM chips were always on 
> a carrier PCB to remap the pinout.
> 
> Ken
> 
> On 3/9/18 6:07 PM, Peter Vollan wrote:
>> Wow, a quick check reveals a 8kX8 SRAM on ebay for $3. Didn't those
>> "memory modules" cost about $30?
>>
>>
>> On 9 March 2018 at 17:57, Chris Kmiec  wrote:
>>> Great, I'll go looking on the intrawebs :)
>>>
>>> You don't happen to have another REX, do you? :)
>>>
>>> Chris
>>>
>>> On Fri, Mar 9, 2018 at 7:01 PM, Fugu ME100  wrote:
 The chips are available they are standard 8Kx8 SRAM.  Should be able to
 find some on line.

 Unfortunately the QUAD is only for the Model 100, it will not fit the 102.

 Congratulations on your new addition :)

 From: M100  on behalf of Chris Kmiec
 
 Reply-To: 
 Date: Friday, March 9, 2018 at 4:33 PM
 To: 
 Subject: [M100] 8K RAM Chip

 Are these available anywhere, or do I have to find a donor system? Just
 got a like-new 102, but no memory expansion.

 I'm assuming QUAD is no longer being made/sold?

 Thanks!
>>>

Re: [M100] 8K RAM Chip

[Mike Stein]

It needs more than just remapping the signals; the required upper two address 
lines are not available on the sockets so you either need to add logic to 
recreate them or modify the main board.

m
  - Original Message - 
  From: Gregory McGill 
  To: m...@bitchin100.com 
  Sent: Wednesday, March 14, 2018 1:22 PM
  Subject: Re: [M100] 8K RAM Chip


  thanks! It seems like we should be able to use the 8x8 chip from the 102 with 
some kludging of lines.. they are pretty close..


  Greg


  On Wed, Mar 14, 2018 at 10:08 AM, Brian White  wrote:

There are at least a few different "build your own ram upgrade" articles on 
club100 and other archives of old forum posts, and in magazines too I think but 
those are hard to search.


Here's one that is not one of the old original ones I was thinking of, but 
looks ok.


http://digilander.libero.it/rar2k/TRS80/Memory24k.html



I have some NEC modules that work that I assume must have originally been 
meant for nec 8201a. They are a little pcb with a single ram chip and an 
additional chip probably a decoder of some sort to consume 4 chip-enable lines. 
I could take some photos of it and maybe it's circuit could be reverse 
engineered from that.


https://photos.app.goo.gl/ZQle2id7AMWdX2bC3



Another option is QUAD, which is a thing that installs in the bus socket 
and displaces the internal ram with it's own full 32K, plus 3 more banks of 32K 
that you can switch between. Although you can't get a quad right now. Steven 
Adolph is testing his latest revision of the design and it's in between right 
now. He found problems with the old version and so removed it from oshpark, and 
th new version is not yet verified.


But assuming that comes along sooner or later, that would upgrade you to 
32K the same as if you had installed all 4 possible modules inside.


-- 
bkw






On Wed, Mar 14, 2018, 11:14 AM Gregory McGill  
wrote:

  ok is there a source for the 100 chips? or a pcb?


  Greg


  On Wed, Mar 14, 2018 at 12:02 AM, Fugu ME100  wrote:

Just the 102,  it uses a standard pin out. The 100 uses a special RAM 
module.


From: M100  on behalf of Gregory 
McGill 
Reply-To: 
Date: Tuesday, March 13, 2018 at 10:58 PM
To: 
Subject: Re: [M100] 8K RAM Chip



  oh wait these are 32x8 :)  are these ones on ebay for the 100 or 102? 
or both? 


  Greg


  On Fri, Mar 9, 2018 at 7:33 PM, Gregory McGill 
 wrote:

if you have the pinouts I have a bunch of 8x8 srams around for TI99 
projects 


Greg


On Fri, Mar 9, 2018 at 6:11 PM, Ken Pettit  
wrote:

  Ahh, I see now the original email stated 102.  So yeah, those 
will work.

  Ken 


  On 3/9/18 6:09 PM, Fugu ME100 wrote:

More if it was R/S :)

This is the one

https://www.ebay.com/itm/1-TOSHIBA-TC5565PL-15-64K-8Kx8-SRAM-CMOS-STATIC-RA

M-5V-150NS-28-PIN-PDIP/321974484773?hash=item4af72cbf25:g:ldEAAOSwGotWlWd9
you mean?



On 9/3/18, 6:07 PM, "M100 on behalf of Peter Vollan"

wrote:


  Wow, a quick check reveals a 8kX8 SRAM on ebay for $3. Didn't 
those
  "memory modules" cost about $30?


  On 9 March 2018 at 17:57, Chris Kmiec  
wrote:

Great, I'll go looking on the intrawebs :)

You don't happen to have another REX, do you? :)

Chris

On Fri, Mar 9, 2018 at 7:01 PM, Fugu ME100 
 wrote:

  The chips are available they are standard 8Kx8 SRAM.  
Should be able to
  find some on line.

  Unfortunately the QUAD is only for the Model 100, it will 
not fit the
  102.

  Congratulations on your new addition :)

  From: M100  on behalf 
of Chris Kmiec
  
  Reply-To: 
  Date: Friday, March 9, 2018 at 4:33 PM
  To: 
  Subject: [M100] 8K RAM Chip

  Are these available anywhere, or do I have to find a 
donor system? Just
  got a like-new 102, but no memory expansion.

  I'm assuming QUAD is no longer being made/sold?

  Thanks!















On Mar 14, 2018 11:14 AM, 

[M100] TS-DOS 4.x (ROM version) for M100

[Mike Stein]

Where can I find a ROM image of TS-DOS 4.x for the M100?

TIA,

m

Re: [M100] List of capacitors

[Mike Stein]

A slightly better scan that's not missing C53-C59:

ftp://ftp.whtech.com/club100/doc/m100ServiceManual.pdf

  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Saturday, April 21, 2018 1:58 PM
  Subject: Re: [M100] List of capacitors


  correction, smack in the middle



  On Sat, Apr 21, 2018 at 1:56 PM, Brian White  wrote:

https://archive.org/details/m100service


towards the end



On Sat, Apr 21, 2018 at 11:39 AM, David Laffineuse  
wrote:

  Does anyone have a complete list of capacitor specs for the M100?

  Thanks,

  David




-- 

bkw




  -- 

  bkw

Re: [M100] TS-DOS 4.x (ROM version) for M100

[Mike Stein]

Thanks, Kevin; shoulda tried that ;-)

m
  - Original Message - 
  From: Kevin Becker 
  To: m...@bitchin100.com 
  Sent: Tuesday, April 17, 2018 1:44 PM
  Subject: Re: [M100] TS-DOS 4.x (ROM version) for M100


  It sounds like there is still an issue with the anonymous ftp.  This was from 
an earlier email:


Ok whtech DOES allow anonymous now BUT with no password.. browsers default 
to a email address password so you will be prompted with a username and 
password box, type anonymous in the username and nothing in the password to 
connect




IF you are getting a timeout your ip has been blocked probably due to 
incorrect login creds repeatedly.. email supp...@lizardhill.com and let him 
know you think you are blocked to ftp.whtech.com he's pretty responsive





  On Tue, Apr 17, 2018 at 1:36 PM, Mike Stein <mhs.st...@gmail.com> wrote:

I'm asked for a login/password ??
  - Original Message - 
  From: Kurt McCullum 
  To: m...@bitchin100.com 
  Sent: Tuesday, April 17, 2018 12:55 PM
  Subject: Re: [M100] TS-DOS 4.x (ROM version) for M100


  http://www.club100.org/library/librom.html


  Be aware that this version has the shift down bug when you have more than 
2 screens of files to show.


  There is also SARDOS, a blend of Sardine and TS-DOS. I did fix the shift 
down bug in all three versions.


  
http://www.club100.org/memfiles/index.php?=0==Kurt 
McCullum/SARDOS





  On Tuesday, April 17, 2018 8:34 AM, Mike Stein <mhs.st...@gmail.com> 
wrote:




  Where can I find a ROM image of TS-DOS 4.x for the M100?

  TIA,

  m

Re: [M100] 8K RAM Chip

[Mike Stein]

- Original Message - 
From: "Francesco Messineo" 
To: 
Sent: Friday, March 16, 2018 11:56 AM
Subject: Re: [M100] 8K RAM Chip


>>> I think it can be done, but you anyway need logic to reconstruct the 
>>> addresses, so why bother with diodes?

>> ...they're used in this case to form three AND gates.
> 
> yes, I know the history :)


My point was that you don't need 'logic'; the diodes are used instead of an IC.
---

> I was only wondering if they checked the standby current draw, that's all.


Good question.

m

Re: [M100] DVI cable for 102

[Mike Stein]

Interesting; yeah, that's what I thought it had to be to explain what's 
happening. Here's what I think:

The 'long' cable is probably the standard M100>DVI cable that came with the 
DVI, and it would presumably work if you plugged it into the M100.

The short M100 cable is probably a home-made shorter version of the same cable 
that does exactly what I did with mine, namely stick the connector on the back 
of the M100 to avoid having to unplug the internal bus connector every time.

The short DVI cable is probably a 102/200 cable that's been modified in order 
to use it as an extension to connect the homemade M100 cable to the DVI.

The problem is that because (s)he used the same 'non-standard' DIP plug inside 
the M100 as the original, the connector on the back of the M100 is 'reversed' 
from the same connector on a 102/200.

For a 102 you have to swap the pairs somewhere along the way; the easiest way 
would probably be to find an old female-female 2x20 cable such as what was used 
for PATA IDE hard disks and insert a set of pins in one end as Brian shows near 
the bottom of his Wiki; of course you could also make a 'twisted' cable as he 
shows elsewhere.

m
  - Original Message - 
  From: Chris Kmiec 
  To: m...@bitchin100.com 
  Sent: Thursday, March 15, 2018 8:51 PM
  Subject: Re: [M100] DVI cable for 102


  Ok, I lied, sneaked in to take few pix before dinner night out... Enjoy, and 
let me know if you want me to take any other angle!


  https://1drv.ms/f/s!AiOtw8Sr4zlvgaBRTB4K9WCxOOmoeQ



  On Thu, Mar 15, 2018 at 7:26 PM, Chris Kmiec <ckmi...@gmail.com> wrote:

And that's what it appears to be doing - both cables connected work great 
with my m100, but the short DVI to system bus part does not respond to anything 
on my 102.




On Mar 15, 2018 5:36 PM, "Mike Stein" <mhs.st...@gmail.com> wrote:

  Agreed; we need better pictures ;-)

  And yes, the insert is definitely confusing.

  But what's also confusing is that it sounds like it works with an M100 
with both cables connected together. I don't see any twists, so I wonder if 
maybe someone modified the 102/200 cable to remove the twists and turn it into 
an M100 extension; in that case both cables connected together would work in an 
M100 but the 102/200 part would not work on the 102.

  (I think; now *I* am getting confused... ;-)

  m

- Original Message - 
From: Brian White 
To: m...@bitchin100.com 
Sent: Thursday, March 15, 2018 5:45 PM
Subject: Re: [M100] DVI cable for 102


Ah, looking at that insert again, I realize it gives all the answers, 
except, looking longer, it seems to give wrong answers that don't add up.


1) The 2-part cable came with the 200-compatible system disk, and they 
both came together as their own package.


2) The drawing seems to say that these are really just two separate 
cables, not a single two-part cable, and the written directions seem to agree, 
it's just that they don't quite say it straight out simply like that. But if 
you do what they say, it ends up resolving out to that.


It's just confusing because of several things:


* The cables might have shipped connected together, according to the 
written directions.

* The drawing looks like one cable with a break with connectors that 
mate, the drawing isn't clear enough to show that "the blue connector" doesn't 
actually look the same or fit into that other cable right next to it.

* The directions actually say "the special two-part cable included".



So, I *think* this is not a two-part cable at all, just simply plain 
old, two different cables to work with two different models of computer.

One cable is for 102 & 200, the other cable is for 100, and that's it, 
the cables are never supposed to be connected to each other.


Which is why I'd really like to see some clear full close pics of the 
cables and connectors from different angles, because if this is true, then 
there should be some funky twists in the wires somewhere, or else these are 
funky connectors that don't map the wires to the pins the same way every other 
connector in the world does at least today.





On Thu, Mar 15, 2018 at 5:17 PM, Brian White <bw.al...@gmail.com> wrote:

  There is a single sheet insert that came with one of my DVI manuals 
that shows a two-part cable, where I think the deal is there's really 3 total 
parts, one for 100, one for 102 & 200, and one for the DVI.

  I scanned it and uploaded it to Archive.org a few weeks ago. It's a 
little paper about the size of a paperback book. Perhaps these came later along 
with the 100/200 version of the system disk? Maybe the mid-way connector 
performs the twists?

  https://archive.org/details/DVI263806Notice


  I too would like specifically more and

Re: [M100] Power Adapter Questions

[Mike Stein]

I think it would depend on the adapter type; I would measure the *actual* 
voltage of both adapters, both unplugged and plugged in with the computer 
turned on.

They do have regulators, in fact they have complete regulated switching power 
supplies. I really wouldn't recommend using the 8.5V supply instead of the 6V; 
extra voltage is usually dissipated in heat, which could possibly cause a 
problem with extended use.

How about just colour-coding the connectors and jacks?

m
  - Original Message - 
  From: Kurt McCullum 
  To: Model 100 Discussion 
  Sent: Friday, March 16, 2018 11:52 AM
  Subject: [M100] Power Adapter Questions


   A quick power question for those who may be able to answer this question. On 
my NEC 8201 the AC power adapter is rated for 8.5 volts. The AC power adapter 
for my 100/102/200/TPDD2 is 6v. I have both on my desk but get them mixed up at 
times even though I try not to. The units seem happy with either voltage. So 
I'm wondering if there is a risk of damage when I accidentally put the 8.5v 
plug in my 200 or 102. Do they have an internal regulator that prevents damage?


  And one other question. I am getting ready to make the modification to my 200 
which allows it to have rechargeable batteries rather than regular AA cells. 
This is an option which the service manual refers to. It involves soldering two 
small jumpers. Will I need to run a higher voltage to charge these batteries or 
is 6v enough?


  Kurt

Re: [M100] 8K RAM Chip

[Mike Stein]

Hi Frank,

Any chance you'd share the PCB files for your RAM modules so we can build some?

m

Re: [M100] DVI cable for 102

[Mike Stein]

That's a possibility, but as far as I can tell no combination of what Chris has 
would work with a 102/200.

m
  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Friday, March 16, 2018 9:49 AM
  Subject: Re: [M100] DVI cable for 102


  Probably someone ends up with 3 cables because probably a single long, 
100-only cable (and a 100-only system disk) came with the DVI, and the two 
short ones came later with the 100/200 system disk.

Re: [M100] Model 100 Backup Battery Replacement

[Mike Stein]

e.g.:
https://www.ebay.com/itm/4-pcs-60mAh-3-6V-Ni-CD-Rechargeable-Battery-Button-Cell-with-Tab-Green-/401159712873?hash=item5d66fb7069

or just go to your local dollar store and pick up a 3.6V portable phone 
battery; it'll be a little larger but last longer.

e.g.:
https://www.ebay.com/itm/Replacement-Home-Phone-Battery-Ni-MH-AAA-300mAh-with-universal-Connector-3-6V/352134685746?epid=2163009360=item51fcdce432:g:qwMAAOSww5JZhB1K

m
  - Original Message - 
  From: Paul Sussman 
  To: m100@lists.bitchin100.com 
  Sent: Friday, March 16, 2018 6:53 AM
  Subject: [M100] Model 100 Backup Battery Replacement


  Can anyone please recommend a source for the correct internal backup battery 
for the M100? I want to be sure I purchase the correct one.

   

  Thanks,

  Paul

   

  Paul

   

Re: [M100] 8K RAM Chip

[Mike Stein]

- Original Message - 
From: "Francesco Messineo" <francesco.messi...@gmail.com>
To: <m...@bitchin100.com>
Sent: Friday, March 16, 2018 5:19 AM
Subject: Re: [M100] 8K RAM Chip


On Thu, Mar 15, 2018 at 7:57 PM, Mike Stein <mhs.st...@gmail.com> wrote:
>> Hi Frank,
>>
>> How about we split the difference and settle on .73"? 

>Well, I don't know, my 700 mils modules work well, I think the difference is 
>so relevant.

(I guess you meant irrelevant?) That's what I thought, until you brought it 
up... ;-)
---

>> As to using diodes, I've often used this technique...

> I think it can be done, but you anyway need logic to reconstruct the 
> addresses, so why bother with diodes? 

Diodes can be used as logic elements; as a matter of fact, before TTL there was 
DTL (Diode-transistor logic): 
https://en.wikipedia.org/wiki/Diode%E2%80%93transistor_logic

That's how they're used in this case to form three AND gates.
---
>>I use only one logic chip for all the work.

I'm not saying that diodes are a better way of doing it, just that it's a 
different approach used by at least one of the commercial modules.

m

Re: [M100] DVI cable for 102

[Mike Stein]

I thought we'd discussed this to death a few months ago...

I don't know where this idea of a third cable comes from; when I bought my DVI 
brand new many years ago it came with two cables just as the insert shows, one 
with a 40-pin DIP Plug at the computer end for the M100, and another with a 
2x20 male IDC header with swapped conductor pairs for the 102 & 200, both with 
aluminum foil shielding on one side.

At least that's what I have; I suppose it's possible that they supplied 
something different at some time.

As far as I can tell, when they designed the DVI they arranged the pins so that 
it would connect to the M100 with a straight-through cable; unfortunately the 
40-pin DIP connector they chose for the M100 end does not use the 'standard' 
pinout convention, so when they duplicated that pinout in the dual-20 header in 
the 102 and 200 they had to modify the cable to conform to the non-standard 
pinout.

If they'd used a 'standard' DIP plug and arranged the DVI pins to match there 
would not have been a problem; the pinout description in the DVI manual even 
suggests that there might have been some confusion in the design process...

m


  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Thursday, March 15, 2018 5:17 PM
  Subject: Re: [M100] DVI cable for 102


  There is a single sheet insert that came with one of my DVI manuals that 
shows a two-part cable, where I think the deal is there's really 3 total parts, 
one for 100, one for 102 & 200, and one for the DVI.

  I scanned it and uploaded it to Archive.org a few weeks ago. It's a little 
paper about the size of a paperback book. Perhaps these came later along with 
the 100/200 version of the system disk? Maybe the mid-way connector performs 
the twists?

  https://archive.org/details/DVI263806Notice


  I too would like specifically more and clearer pictures of the cables, 
especially the connectors. Not the DVI itself. There are lot's of DVI's out 
there and I have 2 myself. But the original cables are mostly gone and there 
are not really even any pictures of the cables and connectors that are good 
enough to trace the conductors right to the pins, and see all possible 
manufacturing marks, like you could if you had one in your hands one in your 
hands.




  On Thu, Mar 15, 2018 at 12:43 PM, Mike Stein <mhs.st...@gmail.com> wrote:

Where did you read about a two-part 100 cable?

Nice pictures but it's hard to tell how many cables there are, what 
connector belongs to which cable, and how you're connecting them.

Does the cable with the male plug that plugs into the 102 and 200 have the 
swapped wires as shown in Brian's Wiki?

m
  - Original Message - 
  From: Chris Kmiec 
  To: m...@bitchin100.com 
  Sent: Thursday, March 15, 2018 7:20 AM
  Subject: Re: [M100] DVI cable for 102


  Looks like what I thought was a 102 cable was just the two-part 100 
cable. I guess reading helps... 






  On Thu, Mar 15, 2018 at 6:02 AM, Chris Kmiec <ckmi...@gmail.com> wrote:

OK, I think I spoke too soon. The DVI is working fine, but I can't get 
any of my 102s to respond, connected to that cable.  


The 100 that came with the DVI has a cable glued on to the bottom from 
the system socket, and same type of connector on the other end as 102 system 
bus. When I connect the 102-looking cable from the DVI and the cable on the 100 
together, everything works together.


I guess I still need a cable for the 102...


On Wed, Mar 14, 2018 at 7:55 PM, Chris Kmiec <ckmi...@gmail.com> wrote:

  :) Ok, maybe not 50, but I'll take some. Here are a few while I'm 
working on cleaning it: 


  https://1drv.ms/f/s!AiOtw8Sr4zlvgaBRTB4K9WCxOOmoeQ



  On Tue, Mar 13, 2018 at 10:39 PM, Brian White <bw.al...@gmail.com> 
wrote:

Can you take about 50 very clear pictures of both cables and 
connectors please? :) 


We have the info to create new cables that function, but I still 
would really like to see the details of the original cables & connectors up 
close and clear just for reference.


-- 
bkw


On Tue, Mar 13, 2018, 10:07 PM Chris Kmiec <ckmi...@gmail.com> 
wrote:

  Ok, I'm in Tandy 100 heaven right now :) Just got my eBay 
package, and despite horrendous packaging, everything survived. Taking 
inventory, I got a beautiful looking DVI, manual, disk BASIC on 5 1/4" disk, 
and BOTH cables, one for 100 and one for 102! Almost afraid to turn it on, but 
that will have to wait until tomorrow when I have a minute to myself...


  On Mon, Mar 12, 2018 at 9:57 AM, Brian White <bw.al...@gmail.com> 
wrote:

The strain relief clip specifically I mean, when you snap all 3 
parts of an idc connector together with no cable, the strain relief bar forms a 
thin slot exa

Re: [M100] 8K RAM Chip

[Mike Stein]

Thank you very much, Frank!

>From your posts here and elsewhere I assumed you weren't particularly 
>interested in building and selling these, but if you do, then by all means let 
>us know what the cost would be. 

However, having just sent something to Italy which, as you know, hasn't even 
arrived yet, I suspect postage would be an issue).

m

- Original Message - 
From: "Francesco Messineo" <francesco.messi...@gmail.com>
To: <m...@bitchin100.com>
Sent: Saturday, March 17, 2018 5:36 AM
Subject: Re: [M100] 8K RAM Chip


> Hi Mike,
> 
> On Fri, Mar 16, 2018 at 6:00 PM, Mike Stein <mhs.st...@gmail.com> wrote:
>> Hi Frank,
>>
>> Any chance you'd share the PCB files for your RAM modules so we can build 
>> some?
> 
> the gerbers are attached. Don't blame me if the modules don't work as
> expected, obtaining the lowest current drain is also a matter of
> correct cleaning after assembling them.
> I can make batches of built and tested modules both for ram errors and
> current drain in standby if there's enough demand. Everybody who had
> my modules seems satisfied so far.
> The ICs are your favourite 8kx8 SRAM (with low standby current option
> and two opposite polarity chip select pins) and a 74HC86. Do not use
> HCT or AC or anything else if you care about standby current.
> The 1206 pads are (obviously) for a couple of 100nF caps as overkill
> DC decoupling.
> Frank
>

Re: [M100] nn - getting back involved.

[Mike Stein]

  - Original Message - 
  From: Brian White 
  To: m...@bitchin100.com 
  Sent: Wednesday, June 27, 2018 2:59 PM
  Subject: Re: [M100] nn - getting back involved.


  This will get a little confusing because we're talking about both main rom 
and option rom at the same time, so watch for that the rest of this post.


  The 100, 102, 200, 600, NEC all use 27C256, both for main rom and option rom 
*electrically*, but, in most cases the pinouts are rearranged. And it's not the 
same rearranging in all cases either.


  In most (not all) 100s main rom, and in all 100, 102, 200, nec option rom, 
the pinout is rearranged.


  Some late model 100s, all 102, 200, and 600, (not sure about nec), main rom 
uses normal pinout.


  Model 600 is the only one I know that uses normal pinout in the option rom 
socket.


  Also, the rearranged pinout for Model 100 main rom is different from the 
rearranged pinout for the option rom!


  But at least the option rom pinout is the same between all 100, 102, and 200, 
and I think nec too.


  (I don't have an nec and haven't look it up so really every time I'm trying 
to say "they all do X except one does Y..." I can't say if nec is included or 
another exception)


  The figtronix adapter boards are a little odd. The option rom adapters use 
28C256 instead of 27C256, so that you can re-flash them without a UV eraser.


  One of the main rom adapters actually uses 28F256, instead of 28C256 or 
27C256. I'm not sure why, but it works. 28F256 is a different pinout from 
28C256 or 27C256, but electrical and signal compatible. I used it on a couple 
100s. I liked it because it makes the main rom both removable and easily 
re-flashable because it can be removed from the pinout adapter, but it's hard 
to recommend, because it does require desoldering the original dip28 socket to 
make enough room for the new adapter and tall through-hole style plcc socket.


  It probably makes more sense all in all, to use the Mike Stein main rom 
adapter, which uses a plain dip28 27C256, with the new rom soldered to the 
adapter, and the combined module inserted in the original socket. Because that 
preserves the original mother board, and it is still physically possible to 
remove and update the main rom, you just need to make up a programming adapter 
to reverse the adapter pinout back to normal, or use a test clip to clip right 
on to the rom but those test clips are getting hard to find. You can't have 
both the original socket on the motherboard and a socket on the adapter. There 
isn't room in the case.


  Setting aside of course the other option which is that there is a way to use 
a REX to not only replace the main rom, but have a fully software hackable main 
rom after that once it's installed. But that requires installing the rex a 
little more permanently than usual.


  -- 
  bkw


  On Wed, Jun 27, 2018, 11:35 AM Nickolas Nolan  wrote:

Hi Brian,

I'm not sure how much information is conflicting here.
I was under the impression for 102, and I know for sure regarding NEC that 
the roms are 27c256 map.
I have been dumping and burning my own for NEC 8201a and 8300. They don't 
even need carriers. SPEAKING OF :) i will start another thread or two for 
something else.

The reference I have for the model 102 is here http://tandy.wiki/FigTronix
again, I'm not sure how much of that documentation is correct, and I will 
try to look at a few more units from my trunk this weekend. I've been meaning 
to attempt a dump of my SuperRom in my 102.

I am also hoping to find or make OSH park print for model100 static ram to 
compliment https://oshpark.com/shared_projects/m3Ugar47

I look forward to verifying as much as possible, and I will attempt contact 
the tandy.wiki owner if there are any corrections.

Re: [M100] nn - getting back involved.

[Mike Stein]

- Original Message - 
From: Brian White 
To: m...@bitchin100.com 
Sent: Wednesday, June 27, 2018 2:59 PM
Subject: Re: [M100] nn - getting back involved.

...
> Also, the rearranged pinout for Model 100 main rom is different from the 
> rearranged pinout for the option rom!
...

Interesting; what is different?

m

Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks

[Mike Stein]

You might also want to check out a set of NiZn batteries; I've mentioned them 
here before but don't know if anyone ever tried them.

They have a nominal voltage of 1.6V and solve the early shutdown problem, 
usually with a capacity of 2500 to 2800 mWh (equivalent to approx. 1500 to 1700 
mAh).

They do require a special charger though, and trickle-charging is not 
recommended.

m
  - Original Message - 
  From: Kurt McCullum 
  To: m100@lists.bitchin100.com 
  Sent: Monday, October 29, 2018 10:04 AM
  Subject: Re: [M100] NEC 8201 rechargeable battery packs and BERG jacks


  I purchased them through eBay. But I went back this morning to see if the 
seller was still selling them and they are no longer listed. They are 480 ma 
cells so two banks gives 960ma. There are other sellers. Most from China but 
you are looking 1/3AA batteries with tabs. Sometimes you can find them stacked 
as 3 in one like I did and that saves some time.



  Kurt





  On Sun, Oct 28, 2018, at 4:53 PM, Anthony Coghlan wrote:

Thanks, everyone.  Kurt, that looks really good.  I’m not familiar with 
those smaller batteries.  How or where do you get them?



Is there any simple mod (such as the added resistor near the batteries for 
the M100) that allows the 8201 to charge rechargeable batteries in a standard 
battery pack when plugged in?



Best wishes,

Anthony

Re: [M100] T-200 BASIC - Data and Restore...

[Mike Stein]

Don't know about LD players but a stretched or disintegrating belt is indeed a 
common problem with CD and DVD players.
  - Original Message - 
  From: Scott Lawrence 
  To: m...@bitchin100.com 
  Sent: Thursday, November 15, 2018 2:01 AM
  Subject: Re: [M100] T-200 BASIC - Data and Restore...


  It might need a mechanical repair inside.  Perhaps a belt attached to the 
tray is failing?


  On Wed, Nov 14, 2018 at 11:08 PM Peter Vollan  wrote:

LD-v4200.
I can hear it trying to eject, just using the front button.
I am looking forward to running this laserdisc player with my model
100, but I first should get it to work properly. I have a DB15
connector to build the adaptor already.

On Wed, 14 Nov 2018 at 19:48, Scott Lawrence  wrote:
>
> Peter;
>
> do you hear anything when pressing Eject on the front panel?
> Or is this serial ("OP" over serial, if it has Level III capabilities)
>
> What model?
>
> -s
>
> On Wed, Nov 14, 2018 at 5:56 PM Peter Vollan  wrote:
>>
>> My Pioneer Laservision player doesn't want to eject.
>> On Tue, 13 Nov 2018 at 08:16, Scott Lawrence  wrote:
>> >
>> > Yeah. I think this is the method I'm going to go with...
>> >
>> > I'm working on a laserdisc-based adventure game engine, highly 
inspired by Kevin Savetz' rediscovery of David Lubar's 
"Rollercoaster"/"Adventures in Videoland" game for the Apple II.  I plan on 
demoing it at the Rochester Maker Faire this upcoming weekend... Tandy 200 + 
Pioneer LD player + "The Mind's Eye" LaserDisc.
>> >
>> > I'm trying to make the code as easily portable and modular as 
possible.  I have the serial interface code written for the T200, and part of 
the game engine, but I'm focusing right now on having all of the game data 
stored in one chunk of program space, like a BIOS.  The game engine in another 
chunk of program space and the game data in another.  It was originally going 
to be purely DATA statements, but changing to "scene 300" via the above method 
is not a possibility. ;)  So I'll have the ON X GOTO a,b,c... part of the game 
data area.   ie the game data is stored in lines 500-1000... and to setup 
RESTORE for room 2:
>> >   100 RM=2 : GOTO 510
>> > or for item 1,
>> >   110 IT=1 : GOTO 520
>> > then in the beginning of the data chunk...
>> > 500 REM Game Data
>> > 510 ON RM GOTO 550, 560, 570
>> > 520 ON IT GOTO 580, 590, 600
>> > ...
>> > 550 RESTORE 551 : RETURN
>> > 551 DATA ...
>> > 560 RESTORE 561 : RETURN
>> > 561 DATA ...
>> >
>> > I know it's not efficient with respect to the BASIC interpreter, but i 
can optimize later. :)
>> >
>> > My outdated github link here: https://github.com/BleuLlama/LlamaLlaser
>> >
>> > -s
>> >
>> > On Tue, Nov 13, 2018 at 12:08 AM Ken Pettit  wrote:
>> >>
>> >> Hi Scott,
>> >>
>> >> The ROM only accepts immediate literal values.  You would need to do 
something like:
>> >>
>> >> 10 V = 2
>> >> 20 ON V GOSUB 80, 90
>> >> 30 READ X$
>> >> 40 PRINT X$
>> >> 50 END
>> >> 80 RESTORE 100:RETURN
>> >> 90 RESTORE 200:RETURN
>> >> 100 DATA "One hundred"
>> >> 200 DATA "Two hundred"
>> >>
>> >> Ken
>> >>
>> >> On 11/12/18 8:47 PM, Scott Lawrence wrote:
>> >>
>> >>
>> >> The "RESTORE" command... can it only take an immediate value, or is 
there a way to pass it a variable?
>> >>
>> >> I want to do something like this:
>> >>
>> >> 10 V = 200
>> >> 20 RESTORE V
>> >> 30 READ X$
>> >> 40 PRINT X$
>> >> 50 END
>> >> 100 DATA "One hundred"
>> >> 200 DATA "Two hundred"
>> >>
>> >> And i expect the output of:
>> >>
>> >> Two hundred
>> >>
>> >> Instead I get:
>> >>
>> >> UL Error in 20
>> >>
>> >>
>> >> Or am I asking too much from BASIC? ;D
>> >>
>> >> -s
>> >>
>> >> --
>> >> Scott Lawrence
>> >> yor...@gmail.com
>> >>
>> >>
>> >
>> >
>> > --
>> > Scott Lawrence
>> > yor...@gmail.com
>
>
>
> --
> Scott Lawrence
> yor...@gmail.com





  -- 

  Scott Lawrence
  yor...@gmail.com