--
Mark G. Thomas , KC3DRE
my 820-II physically leak, and the damage can be
serious.
> > The 820-II restoration was a fun and rewarding project. It is well
> > documented, easy to work on. It was also my first ever CP/M computer.
> > When I was in high school, the 820 motherboards were readily available
> > for $75.
> >
> > Mark
> It sounds like you had a good time, which in my opinion is the main goal!
>
> --tom
--
Mark G. Thomas , KC3DRE
ice.
The 820-II restoration was a fun and rewarding project. It is well
documented, easy to work on. It was also my first ever CP/M computer.
When I was in high school, the 820 motherboards were readily available
for $75.
Mark
--
Mark G. Thomas , KC3DRE
Hi,
I'm not prepared to lay out $200 for these Xerox ROMs, but if I do manage
to get them, I'll read and share them. I did not know there were 5.0 ROMs
for the 820-II, but it appears there were, and they are included.
https://www.ebay.com/itm/184980603844
Mark
--
Mark G. Thomas
Hi,
I'm not prepared to lay out $200 for these Xerox ROMs, but if I do manage
to get them, I'll read and share them. I did not know there were 5.0 ROMs
for the 820-II, but it appears there were, and they are included.
https://www.ebay.com/itm/184980603844
Mark
--
Mark G. Thomas
e XXDP V2 Driver Guide (minus the
appendices), along with originals of some related documents.
https://github.com/rust11/xxdp/tree/main
--
Mark G. Thomas , KC3DRE
re:
https://groups.google.com/u/1/g/comp.sys.tandy/c/X_6fSse6As4
I've temporarily (please save these if you want them) copied what I
could find in terms of documentation and schematics for these ICs here:
http://files.markgthomas.com/dl/SP0256-speech-IC-board/
Photos of mine are included.
Mark
fficult that might be.
When I put these together and was getting them working initially, Terry
Gulczynski was very helpful. See his site at http://www.stack180.com/
You may want to get the latest P112 ROM image and corresponding CF card
image from his site.
Mark
--
Mark G. Thomas , KC3DRE
me rather strange behavior.
Do you mean the p112?
Mark
--
Mark G. Thomas , KC3DRE
Rod, others,
I have so far been unsuccessful getting my CQD220A for SCSI HD, and RQDX3 for
floppy to coexist in an 11/83, at least with bsd2.11. I am eager to hear
whether you get both controllers working in the same box, and how.
Mark
Mark G. Thomas (m...@misty.com), KC3DRE
> On May
r CF-SCSI adapters, I could send
you an installed, bootable, patched BSD2.11 Complact FLash card, or
image file you could put on a CF or disk. I'll follow up with you off
list. Or, maybe there is some way you could write one of these images
out to a SCSI disk via another system.
I'll follow up with you of
Hi,
> On Jul 27, 2018, at 18:08, systems_glitch via cctalk
> wrote:
>
> All,
>
> I'm looking for any or all of the following Data I/O Socket Adapters:
>
> 351A-070 (8741, 8748, etc)
> 351A-071 (8751)
> 351A-072 (8755A)
I suggest asking on the DATAIOeprom list on groups.io too.
I’m looking
ot sure if they actually sell for that kind of
money. Maybe there is another entire category of collector who buys that
kind of stuff for that kind of money.
It would have been my loss had I written off Mitch on the basis of some
of Mitch's listings expensive, but admittedly rare, pdp-11 sw
with tons of CP/M floppies I have.
I was always surprised not to hear more from other p112 users.
There is a mailing list, but the last post I know of was five years
ago when I asked if anyone else was on the list.
http://lists.feedle.net/cgi-bin/mailman/listinfo/p112
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi,
Please see resolution below, if you are curious about how this turned out.
On Wed, Dec 20, 2017 at 09:18:50PM -0500, Mark G Thomas via cctalk wrote:
> Hi,
>
> > On Wed, Dec 13, 2017 at 9:08 AM, Mark G Thomas via cctalk <
> > cctalk@classiccmp.org> wrote:
> &g
number of chips successfully
before I ran into this problem with a particular batch of chips.
Mark
Mark G Thomas
> On Feb 4, 2018, at 9:40 AM, David Griffith via cctalk <cctalk@classiccmp.org>
> wrote:
>
>
> I have a few tubes of ST-branded M27C256B UV-erasable EPROM chips.
.01a Setup Diskette Disk 1of1 HD 3.5
Windows 95/NT/3.1x and DOS Drivers
>From Windows 95 or NT Click Start, Run, Type a:\setup
>From Windows 3.1 or NT 3.52 File/Run Type a:\setup
>From DOS Type a:, Type dosinst
-------
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
simple small portable 2-8 line devices. A quick search on e-bay
produces lots of listings for these devices.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi,
> On Wed, Dec 13, 2017 at 9:08 AM, Mark G Thomas via cctalk <
> cctalk@classiccmp.org> wrote:
>
> > Hi,
> >
> > I am working on several projects requiring 2708 and 2716 EPROMs, and
> > am finding some of my chips will not erase, and some will not tak
baking such EPROMs in the oven, but
I do not remember temperature or time. I was surprised that Google
didn't turn up anything useful with this info.
I'm sure someone here will have some notes on EPROM baking.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi,
Does anyone know where I can find the Altair Peripheral Emulator?
Links I have found so far are all dead:
http://home.comcast.net/~forbin376
http://frankbarberis.tech.officelive.com/default.aspx
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
. 5.3 CDs shoud be readily available on ebay for cheap. I think I got
mine for less than $20, and you can probably find the 5300-12-02-1036 SP
download via google.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi,
On Thu, May 11, 2017 at 11:31:21AM -0400, Mark G Thomas via cctalk wrote:
> Hi Bill,
>
> On Tue, May 09, 2017 at 09:56:15PM -0400, william degnan via cctalk wrote:
> > Hi,
> >
> > I was contacted though my site by someone looking for a boot disk for their
>
e card:
0xE000 Morrow Disk Jockey 2D Floppy Controller Users Manual 1980 rev2.pdf
0xF800 Disk_Jockey_2_Model_B_Technical_Reference_Rev_1_Dec82.pdf
Please feel free to put the person inquiring in contact with me. I'd like
to get mine booting, and may be able to help them do similarly.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi Bill,
>
> From: cctalk [cctalk-boun...@classiccmp.org] on behalf of Mark G Thomas via
> cctalk [cctalk@classiccmp.org]
> Subject: KDJ11-B PDP 11/73 getting stuck in Exit standalone mode diag #56
>
> Hi,
>
> I picked up an
In the 22-bit mode, the exit standalone mode is checked by using the
guaranteed timeout address of 17 760 000 to verify that the timeout
logic works without hanging up the CPU.
---------
--
Mark G. Thomas (m...@misty.com), KC3DRE
a
small screwdriver and a paperclip. There is a knack to getting the
pins to stick in the right places while applying just slight turning
pressure with the screwdriver. You may be able to unlock the keyswitch
if you read about pin tumbler locks, no official "picks" necessary.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
n successful.
I believe this is a suitable replacement. I found it while getting the
parts together necessary to build my bare IA-1010 Z-80 board.
"AM26S02PC - Schottky Monostable Multivibrator ( 5 pcs ) - 16 Pin DIP Plastic"
http://www.ebay.com/itm/261370092245
Mark
--
Mark G.
ssue but wasn't able to get
> info.
>
> Thanks
> Eugene W2HX
I bought one of these for $18.47 for my 8/e, and it works fine.
http://www.ebay.com/itm/142118132040
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi,
Does anyone have any available? I don't need the paddles, just the
the ON-OFF-ON momentary switches.
I got good ON-OFF address/data ones from Herb Johnson, but the momentary
ON-OFF-ON ones I have are worn out and do not return to center properly.
Mark
--
Mark G. Thomas (m...@misty.com
WEZKGmecU3RgQ8
>
> TI 99 with a ton of program modules including BASIC
> https://goo.gl/photos/XyNZRuSwwYHzJiLL7
>
> Let me know if/how you want to move forward. Please feel free to share
> with anyone you think might be interested.
>
> Rick.
>
> --
> Rick Bunker
> r...@bunker.us
--
Mark G. Thomas (m...@misty.com), KC3DRE
anyone have any other suggestions about what I might be doing wrong?
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
up, if no one else beats me to it.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
e reseated and repositioned
the boards. The connectors are very clean. Wiggling boards doesn't change
any of the symptoms. Wiggling switches doesn't affect anything. This is
a very clean 8/e.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
or bartering?
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
,
just something quieter, moving less air, but still enough air.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi,
On Mon, Dec 07, 2015 at 02:25:25PM -0500, Christian Gauger-Cosgrove wrote:
> On 6 December 2015 at 13:24, Mark G. Thomas <m...@misty.com> wrote:
> > As much as I love old CPUs, I've lost my patience with hard disk drives.
> > I've been using AztecMonster (search e
console
> > panel and check to see if there is still a NiCad battery pack
> > installed. The battery pack is mounted under the console panel PCB and
> > you have to remove a few screws holding the PCB in place to get to it.
> > If the pack is still installed then remove it. If it hasn't already
> > started leaking it is only a matter of time before it does and starts
> > corroding the PCB.
> >
--
Mark G. Thomas (m...@misty.com), KC3DRE
an enclosed frame, consider a
TO-3 regulator and screw-mount bridge recifier on an aluminum back-plate.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi,
Does anyone happen to have a spare MXV11-B (M7195-XX) they would be willing
to sell or trade?
I'd like to build a small BSD2.11 system from this M8192 from the cheap
board guy on e-bay and need something with a bootstrap ROM.
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi Johnny,
On Fri, Aug 28, 2015 at 07:33:21PM +0200, Johnny Billquist wrote:
On 2015-08-28 19:30, Mark G. Thomas wrote:
Hi,
Does anyone happen to have a spare MXV11-B (M7195-XX) they would be willing
to sell or trade?
I'd like to build a small BSD2.11 system from this M8192 from
? Does anyone have good
instructions for this modification -- I'll probably want to do it. Do I just
add the additional address lines, or are there other considerations?
Mark
--
Mark G. Thomas (m...@misty.com), KC3DRE
Hi,
On Fri, Aug 21, 2015 at 03:00:25PM -0400, Noel Chiappa wrote:
From: Mark G. Thomas
4x M8192 - KDJ11 (AA or AB?) -- two work, two fail POST
And alas, we don't seem to have any prints for that card (although we do have
what amounts to a tech manual, so maybe we can create a set
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