I'm not familiar with the T200 - Surely there's a current limiting resistor?
...with octal thrown in just for fun...
Extra Credit if one of your Tandys is a dedicated PDP-8 terminal, eh Mike?:)
100 mW can cross oceans, given the right techniques.
One such is called by hams "QRSS".
http://www.ka7oei.com/qrss1.html
Of course I know this is'nt what you guys have in mind,
but perusing the page will leave you with some notion of
the trade-offs between power, bandwidth, and range.
And may
...So unless you want to use a CP/M machine for file storage...
Hey! I resemble that remark...:)
Great stuff, Mike!
Mind if I use that line? ("I'm saving it for the grand-kids"... I have two :)
Ask around here: http://www.vintage-computer.com/vcforum/forum.php
Someone probably knows...
I'm afraid I can't do that, Dave... :)
On 5/13/15, Flow gmail wrote:
>
>> Subject: Model 1000+1
>>
>> Or, how about a full surface keyboard with micriphone which would fade to
>> touchscreen upon "Enter" ? Solar panel would fill the obverse side of the
>> slim case.
>>
>> Gene Corrigan
>> flowc
:)
On 5/14/15, Mike Stein wrote:
> ROFL !
>
> - Original Message -
> From: Russell Flowers
> To: Model 100 Discussion
> Sent: Thursday, May 14, 2015 10:01 AM
> Subject: Re: [M100] Fwd: Model 1000+1
>
>
> Dave's not here, man.
>
>
>
> On Thu, May 14, 2015 at 9:00 AM, Flow gmai
...Low and behold it works!
Or High and behold, as the case may be - Good show! :)
...I use a carbide-fired miners lamp...
A Real Programmer would capture the lamp's waste heat to
produce the steam that runs his dynamo...
:)
For those struggling with USB-2-RS232, I've had excellent results with
https://www.adafruit.com/product/284
FTDI chipset; RTS/CTS is broken out, & DTR is available if wanted.
Mine works reliably at 230.4K, with W8.1/Tera Term.
...How do you connect this card to a RS-232 9- or 25-pin connector ?
I built an adapter board with a 6-pin header and various I/O options;
including a MAX3232 for devices with real serial ports, logic analyzer
connection, and a header for jumpers with DB connector pins on the
other end - Quit
Eneloops work fine in the laptops.
Hiraghm -
I'd be tempted to connect a USB-2-RS232 converter to the USB output
of your GPS - The default output of many GPS receivers is 4800 / 9600
baud ASCII "sentences". I'd try 9600 first. Your M100 should be able to
deal with that...
http://en.wikipedia.org/wiki/NMEA_0183
This'll get you started deciphering NMEA sentences:
http://home.mira.net/~gnb/gps/nmea.html
There's a ton of other sites you can consult as well...
This is pretty good too...
http://www.gpsinformation.org/dale/nmea.htm
+1
Thanks Tez...
Boy do I know that feeling...Wish I could help.
Good luck.
No pop-ups? Say it is'nt so... :)
...seems like an *awfully* generic and low-cost part to bother counterfeiting...
Nothing is thrown away in China.
When times are good, a goodly amount of "counterfeits" are factory
production rejects. When times are less good and demand slackens.
value is engineered out at the factory to suit
"bitchin" iwas not an acceptable usage in polite society in the UK /
Commonwealth when I was a young man - Which was a long time
ago, sad to say... :) Mind you, I'm not complaining, but apparently
someone is, or was...
...Must be doing something awesome...
No doubt. The King's English & it's Gringo equivalent have
more than a few booby traps - "bugger" comes to mind.
AFAIK surfers don't get the blame for that one... :)
Hi Jan -
There are several such schemes out there, but $5 takes the palm!
Very nice, thanks...
Also, could'nt you use 6 NiMH cells in a holder, plugged
into the "DC Adapter" jack?
Historically, telecom regulation in the UK was rather different
than what we're used to - Television receivers required licenses,
for instance. Data was charged for by the byte. I'm speculating
that built-in modems may have (had) some similar dis-incentive
built-in for the manufacturer or re
On 12/22/15, John R. Hogerhuis wrote:
> Should work. Laddiealpha has more features but if all else fails DLPlus
> will work.
>
> One interesting thing about DLPlus is it's based on DL. The original code
> had login prompt built in. I'm not sure if I kept it working since I didn't
> know what it wa
Seen this?
https://www.adafruit.com/product/2810
Nice! Thanks, Tom.
On 12/22/15, Tom Hoppe wrote:
> I thought this looked intriguing as well:
>
> https://www.raspberrypi.org/forums/viewtopic.php?t=37203
>
> https://github.com/mholling/rpirtscts
>
> Being able to connect the M100 directly to the Raspi and not have to mess
> with USB is very co
On 12/22/15, John Gardner wrote:
> Nice! Thanks, Tom.
>
> On 12/22/15, Tom Hoppe wrote:
>> I thought this looked intriguing as well:
>>
>> https://www.raspberrypi.org/forums/viewtopic.php?t=37203
>>
>> https://github.com/mholling/rpirtscts
>>
>
Jan -
ISTR that getting a NEC 8201a serial port to talk to a BS1
was trivial - No longer remember details (20 years ago); I
may have used current-limiting resistors - The BS1 allows
you to specify all the port parameters, so it was simple to
figure out what worked...
https://en.wikipedia.org/
...https://xkcd.com/862/...
:) Thanks, Willard.
Thanks, Willard. That's good stuff...
On 4/9/16, Willard Goosey wrote:
> On Sun, Apr 10, 2016 at 08:07:09AM +1200, Gary Hammond wrote:
>
>> At http://www.cpm.z80.de/small_c.html there appears to be some ports
>> for Small-C compiling for 8080/8085 on x86 platforms so one of these
>
> Yes there
This will interest some...
http://hackaday.com/2016/04/12/dump-your-old-computers-rom-using-audacity/
If your PC is a 32-bitter, try installing NTVDM...
It's been a few years since I've used my 8201a / W8.1 tablet link.
This is the converter I use - Breaks out the stuff you need, and
otherwise works flawlessly - It'll run 230.4k with TeraTerm / W8.1;
Not with a K85 clone, of course...
One other caveat - Mine is a few years old now; one never
https://en.wikipedia.org/wiki/OS-9
That's amazing! Thanks, Bill.
Simply to chime in - There's no chance of me joining Facebook,
for any reason. OTOH, you're not missing much... :)
Intermittent PCB traces on the boards are'nt unusual...
Thanks, Josh - Memory lane... :)
On 11/3/16, Josh Malone wrote:
> For those of you that don't know, the Antic podcast (an Atari 8-bit
> computer podcast) has been publishing tons of interviews with people from
> the 70s-80s computer worlds. Right after I uploaded a number of Waite Group
> Press
Cheer up, Josh. Very likely your new SRAM uses considerably
less stay-alive power than the legacy stuff. Since you've hopefully
ruled out the IC - Have you tested the power, ground, & CE trace?
On 1/3/17, Willard Goosey wrote:
> So, how's your free-time situation? Are you still buried?
>
>
Facebook is so... Twenty-Oughties... :)
As a survivor of the 1940s, I hope you guys will bury
the hatchet, & publish...
I've had the experience of giving away the design of a product
because it simply was'nt in the cards for me to service demand.
(In the Early Holocene there was no open-source...)
30 years on, that product is still being sold - I smile every time
I see a new catalog, or a reference in the lite
As a matter of curiosity, does anyone know if removing the battery
& disconnecting the Nicad would result in a Cold Start when power
was restored?
...
On 2/4/17, Brian Converse wrote:
> All working now. I ordered a power supply on Ebay (26-3804) - thanks for the
> link.
>
> I had a 100 when I
If you're lucky, it might just be a cap - Or two...
...
On 2/9/17, Christopher C wrote:
> Thanks for letting me know that it went to a good home.
>
> I have a similarly ‘damaged’ machine, with slightly different symptoms.
> I will have to check on whether or not the disk is functioning, but it
It also happens that the Nicad simply does'nt work any more,
no matter how long it's charged. If a day with external power
connected does'nt resurrect it, I'd be opening it up to inspect;
hopefully it has'nt leaked caustic goo all over the PCB, yet...
...
On 3/13/17, Gregory McGill wrot
Cheer up, Willard. Been there, done that.
More than once... :(
On 3/23/17, Willard Goosey wrote:
> Doesn't help when I get all obsessed with something. I was all "it's a
> pointer it must be declared as such"
>
> Anyway that's most of a day's hacking wasted. At least rcs is over its
> ma
Self-doubt is the first step to self-knowledge? :)
...
On 3/27/17, VANDEN BOSSCHE JAN wrote:
> If you say so ...
>
> Some consolation and/or wisdom offered.
>
> In Dutch: Zelfkennis is het begin van alle wijsheid
> = Selfknowledge is the start to all wisdom
> Sometimes completed with : .. e
So whats your beef, Willard?
On 3/30/17, Willard Goosey wrote:
> Ok people its time for community design!
>
> So. The ROM function KYREAD checks to see if a key has been pressed on the
> keyboard. If a key has been pressed, it returns the ASCII value. Nice and
> simple... Until someone presses a
:)
On 3/30/17, John Gardner wrote:
> So whats your beef, Willard?
>
> On 3/30/17, Willard Goosey wrote:
>> Ok people its time for community design!
>>
>> So. The ROM function KYREAD checks to see if a key has been pressed on
>> the
>> keyboard. If a key
...Funny how some UIs look more like scar tissue than a designed interface...
:) It probably scar tissue, John...
On 5/10/17, John R. Hogerhuis wrote:
> Thanks guys.
>
> I just need to figure out the funky web panel interface puzzle they've
> constructed around MX records. Funny how some UI
Get some cheap IC adapter boards, DIP to SOIC for instance,
& practice soldering duff chips to them. You'll get the hang of
it without the stress of losing parts looming over you.
The adapter boards will come in handy too, by & by... :)
On 5/11/17, Josh Malone wrote:
> On Tue, May 9, 2017
Last time I looked, NiMH manufacturers advise
against trickle-charging NiMH cells. YMMV.
Do you feel lucky? :)
On 5/30/17, Brian White wrote:
> I got replacement NiMH instead of NiCD.
>
> As far as I can tell, they can drop in to NiCD charging circuits.
>
> But then after the fact, I saw co
FWIW -
Thanks to a previous bad experience with a leaking NiCD, I
replaced the NiCD in my 8201a's with 3 F supercaps, which
to my knowledge don't leak, and use Eneloop AAs in the
battery pack.
Low-Self-Discharge NiMH cells like Eneloops are integral to the
scheme - A fully-charged Eneloop p
Yes, that's what I wanted too, after losing my custom-built
1991 386DX to a leaking clock B/U battery some years ago.
Totally my fault, of course; hence the overkill...
...
On 5/31/17, Kurt McCullum wrote:
> I went a little different route with mixed success. I bought some high
> capaci
Did you measure the quiescent current of the RAM module?
Older RAM chips sometimes start drawing milliamps instead
of microamps...
That'd cause your problem, & its not that unusual.
...
On 5/31/17, Kurt McCullum wrote:
> I've got a bit of a different battery issue. I bought a Sidecar memor
That's a good point! Do you know offhand the size of the
current-limiting resistor in series with the NiCD?
On 5/31/17, Brian White wrote:
> I had given 80mah as part of the search term to use, because that is the
> standard capacity of the current standard drop-in replacement for the same
> si
The m100 techref schematic shows 1.6k (I think - it's an awful photocopy I
> found online)
>
> https://dl.google.com/dl/androidjumper/mtp/502266/androidfiletransfer.dmg
>
> On Wed, May 31, 2017 at 2:01 PM, John Gardner wrote:
>
>> That's a good point! Do you
Dunno about the fit, but it oughta work.
If you're at all concerned about cells leaking though, Mike's
Li phone battery is a better idea, IMHO - Alkaline batteries
are arguably your worst possible choice...
Might be a good idea to "diode-OR" it have a healthy
resistor, say 100K, between
> How did you accommodate the voltage difference between the NiCd and the
> SuperCap?
>
> On 5/31/17, 11:23 AM, "M100 on behalf of John Gardner"
> wrote:
>
> FWIW -
>
> Thanks to a previous bad experience with a leaking NiCD, I
>
> replaced the N
he NiCd anyway; whatever you replace it with will probably do a
> good job for many years.
>
> m
>
> - Original Message -
> From: "John Gardner"
> To:
> Cc:
> Sent: Thursday, June 01, 2017 8:04 PM
> Subject: Re: [M100] how about using (3) 2/3 AAA nic
There are all sorts of neat things you can do with the IPL feature.
Example: Run a tiny asm pgm which configs the background task
interrupt to increment a counter once a second; an elapsed-time
counter for Power-On - Useful for keeping track of battery perform-
ance, for instance.
Check out
Hi Willard, you probably already know this, but the Cleauseau/ROM2
option ROM has a disassembler which IIRC will print, & print to file.
Its not the fastest thing in the world, but it does work. Just saying...
...
On 6/7/17, Willard Goosey wrote:
> On Wed, 07 Jun 2017 07:58:51 -0700
> K
Merchants who specialize in Acrylic plastics often also sell
scratch-removing & polishing compounds.
...
On 6/12/17, Ken Pettit wrote:
> There is a pictorial process shown at Club100 that Rick Hanson used to
> use. It shows names of products, etc.
>
> http://www.club100.org/stories/05/featur
...Retrobright...
I've heard it both ways - What's the right way, Mike?
...
...Retrobright
Thanks.
... BAR RULES, MAN...
:)
On 6/16/17, MikeS wrote:
> +1
> - Original Message -
> From: Bob Pigford
> To: m...@bitchin100.com
> Sent: Friday, June 16, 2017 8:00 PM
> Subject: Re: [M100] List rules reminder
>
>
> Thanks, John! This is the most helpful and respectful list I
...The best documentation I've seen file system programming is the NEC
programmer guides.
Which are where?
On 6/18/17, John R. Hogerhuis wrote:
> On Sun, Jun 18, 2017 at 1:18 PM, Willard Goosey wrote:
>
>> Is there some way (if it's even needed) to close a RAM file opened with
>> MAKTXT or FNDF
Thanks.
On 6/18/17, John R. Hogerhuis wrote:
> On Sun, Jun 18, 2017 at 4:50 PM, John Gardner wrote:
>
>> ...The best documentation I've seen file system programming is the NEC
>> programmer guides.
>>
>> Which are where?
>>
>
>
> http://www.web8201.net/default.asp?content=tech.asp
>
> -- John.
>
I believe the OWL hardware & firmware were done by Tracy
Allen at EME Systems. A polite request to Dr. Allen for info
might get a response.
i...@emesystems.com
...
On 6/19/17, Ken Pettit wrote:
> Hi Brian,
>
> That is an interesting find. Makes me wonder what things people will
> dig up
What may be going on is the 8201a has been sitting for a while
with no battery or mains power. The NiCd that backs up memory
has run down; the internal impedance of an old, discharged NiCd is
fairly high, so when external power is applied it does'nt draw a lot of
current. As it charges the
I used a Panasonic 24-pin printer with my NEC 8201a - 25 years ago?
I don't remember much about it, but if it'd been a struggle I probably
would remember that...
On 6/26/17, user evers wrote:
> All,
>
> Would it be possible to use my m102 with an old Panasonic 24 pin printer if
> it supports E
Josh - When I moved late last year I had that NEC cassette you guys
are talking about. When I find it I'll mail it to you, if you're willing to
make digital copies available - There's a bunch of useful stuff on the
tape - Bank Switching under pgm control, for instance...
Jack
On 6/29/17,
...When are you going to speed up Virtual T?
Not necessarily a bad thing - If it works on the emulator
it may well work on the target hardware :)
On 7/9/17, Mike Stein wrote:
> Hey Ken,
>
> When are you going to speed up Virtual T? The guy in the video says it's
> slower than a real M100 !
...now I have to resist the temptation to scan every UPC code in the
house...
:)
My $.02 HK - I have two (8201a) - Both have flaky ON/OFF switches.
One was replaced, a lot of years ago now. The "new" one is now flaky... :(
The occasional shot of Deoxit seems to help. Perhaps the RAM switch
on the bottom of the case would similarly benefit. HTH.
On 7/14/17, Gary Weber
Just for grins, Kurt - Are you using the SIO1/2 access routine in
the service manual?
On 7/14/17, Kurt McCullum wrote:
> Thanks Mike,
> I tend to agree with you after looking at the schematic. I have wired a
> cable directly to the port and I get nothing. I may end up buying a TTL
> level FTDI
Go, Willard! Good show... '8)
On 7/27/17, Willard Goosey wrote:
> The Model 100 library for Small-C 85 has been uploaded to:
> http://www.sdc.org/~goosey/m100/m100smallc0.0.7.zip
> -and-
> to my ("Willard Goosey") personal library at Club 100, under "linux
> cross development".
>
> In this rel
Something for you guys interested in getting on-line to think about...
https://motherboard.vice.com/en_us/article/9kwek8/long-live-gopher-the-techies-keeping-the-text-driven-internet-alive
...the problem is somewhere between the db25 and the UART...
Most likely. I'm no great troubleshooter, but if I may...
Set up a test file which contains a long series of 0xAAs, as in
10101010...
Send the file at a baud rate which is easy for you to see with
whatever you've got for test equi
up a signal.
>
> Kurt
>
> -Original Message-
> From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of John
> Gardner
> Sent: Wednesday, August 02, 2017 9:24 AM
> To: m...@bitchin100.com
> Subject: Re: [M100] Model 100 serial port
>
> ...the problem is some
then sends another.
>
> I'll do more testing but my first impression is that it's the UART.
>
> Kurt
>
> -Original Message-
> From: M100 [mailto:m100-boun...@lists.bitchin100.com] On Behalf Of John
> Gardner
> Sent: Wednesday, August 02, 2017 9:24 AM
> To:
So flipping a 3.5" floppy work, if the housing for the disk
would let you do that. Hmm...
And the reason HD disks are unreliable is that the signal returned
by the media when reading the disk is (presumably) too high?
Interesting...
...
On 8/8/17, biggran...@tds.net wrote:
> The speci
Once upon a time PC mags had bar code pgm listings. Getting
that going again might be fun... "8)
...
On 8/17/17, Roger Mullins wrote:
> Very excited - I picked up a bar code reader on eBay this morning via Buy
> It Now while I was waiting for the drop-off line to clear at my kid's
> school
;>
>>
>> Kurt
>>
>>
>> On Friday, August 18, 2017 7:26 AM, Kurt McCullum
>> wrote:
>>
>>
>> I've got those programs Willard. I'll try to upload them today.
>>
>>
>> On Friday, August 18, 2017 12:45 AM, Willard
...You could make a board where the chip is soldered on, and that
would fit in the original socket. The problem then is, that chip
would not be re-programmable very easily, because the combined
chip-on-adapter creates a non-standard pinout that a programmer
doesn't support...
A pgming adapter sou
I could'nt remember the key color scheme(s) on the Selectrics,
if any; a quick look through the images Boodle pulls up did'nt
turn up multi-color key schemes, but I could swear I've seen
some... Oh well - If you're old enough to remember this stuff,
you're probably too old... "8(
On 9/5/1
gt;> Oh, and what was it we were talking about anyway?
>>
>>
>> On Sep 5, 2017, at 3:35 PM, John Gardner wrote:
>>
>> Oh well - If you're old enough to remember this stuff,
>>
>> you're probably too old... "8(
>>
>>
>
! Good luck, Philip...
On 9/8/17, Philip Avery wrote:
> Me, me! I'm making the trip from New Zealand. But I won't be the
> furthest travelled, one is coming from Australia.
> If all goes well between now & then in my development dept, I'll be
> bringing my remem-powered T102 to demonstrate CP/
I don't have a 200 schematic, but someone suggested putting the
cap a diode drop below the rail. Worth a try, IMHO.
FWIW, my 2 NEC 8201a Supercap transplants (2011) continue to
behave themselves. For anyone tempted, last time I looked there
were 5 F / 5.5 VDC supercaps out there...
On 9/
Or simply subtract the Divisor from the Dividend until the Dividend
is less than the Divisor - The index of the loop is the
Quotient, & the Remainder is what's left of the Quotient.
I hope I did'nt screw that up - 3rd grade was about 60 years ago...
:)
On 9/20/17, John R. Hogerhuis wrote
Yep, I screwed it up - The Remainder is what's left of the Dividend.
Anyway, have fun - My 9-year-old daughter is nearly 40. Good times...
On 9/20/17, John Gardner wrote:
> Or simply subtract the Divisor from the Dividend until the Dividend
>
> is less than the Divisor - Th
to figure out is where to insert the test between steps 1
> and 2 to make sure that the program doesn't spit out "What is 5 divided by
> 12" or "What is 8 divided by 0".
>
> On Wed, Sep 20, 2017 at 11:35 AM, John Gardner wrote:
>
>> Yep, I screwed it
Hi Brian.
I'm also struggling with diminished eyesight - Not to mention the
onset of senescence... Clip-on loupes for eyeglasses help. Also
have had some luck reflowing single-sided SMD boards on kitchen
stove "glass" burners. YMMV, naturally...
...
On 10/9/17, Brian Brindle wrote:
> I
"NEC Programmers Reference"?
OK - I'll bite...
On 10/25/17, Stephen Adolph wrote:
> Boy I wish we could all agree on variable names in M100!
>
> here is my assessment of what you've done-
>
> 1) you are using the wrong starting location. Think you need to use the
> ASCTAB (DOSTART?) locatio
Thanks, John. Any particular file you have in mind? I don't see
a "NEC Programmers Reference".
On 10/25/17, John R. Hogerhuis wrote:
> On Wed, Oct 25, 2017 at 2:17 PM, John Gardner wrote:
>
>> "NEC Programmers Reference"?
>>
>> OK - I'
AOBTW, that site went about 15 years without an update - Looks different
now, so I'm guessing the Band is taking the year off...
On 10/25/17, John Gardner wrote:
> Thanks, John. Any particular file you have in mind? I don't see
>
> a "NEC Programmers Reference"
Thanks.
On 10/25/17, John R. Hogerhuis wrote:
> On Wed, Oct 25, 2017 at 2:48 PM, John Gardner wrote:
>
>> Thanks, John. Any particular file you have in mind? I don't see
>>
>>
> I guess "technical reference" and "technical notes" are the relevant stuff.
>
> -- John.
>
...when you have to lie to the OS to get it to work... Must be Microsoft...
"8)
Borland Turbo Pascal - generated code stacked up
pretty well against assembly, and ran rings around Turbo C, on DOS
machines like my 200LX (80186).
On 10/28/17, Willard Goosey wrote:
> On Fri, 27 Oct 2017 02:31:57 -0400
> Brian White wrote:
>
>> >C and the 8080 are just not a good match. C
Yup. If you have a clock, you know what time it is.
If you have more than one clock, you don't... :)
...
On 10/31/17, Peter Vollan wrote:
> Let me sure that I understand: however correctly you set the time on
> your Model 100, it will "drift off", because it cannot keep correct
> time?
>
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