I'm looking for the images of ROMs installed on the IOC (I/O controller)
board of Intel MDS-2 development systems. In particular I'm looking for
the content of the character generator ROM (A19-2708) and of firmware
ROMs (A50 to A53-4x2716). So far I had no success in googling them.
My goal would be to contribute a good emulation of MDS systems to MESS,
especially for what regards the look of the video terminal. Well, this
is the plan, when "real-life" is not inteferring too much...
Thanks a lot.
I?ve been struggling getting a 64k Dynamic RAM card back up and working in my IMSAI 8080. In fact I?m giving up on the DRAM card in this system and have decided to start looking for a SRAM card that can get the IMSAI up to 56k.
In terms if SRAM cards, I presently have:
2 x Problem solver RAM16 cards - both seem to be working.
2 x 8K RAM cards - both seem to be working.
Less cards generating heat, and putting stress on the old power supply is obviously best, so I?d be looking for either:
- 1 x 16k SRAM card (for a total of 4 RAM cards (3 x 16k + 1 x 8k) in my system). A PSS RAM16 would be preferred for sake of consistency, but obviously not crucial.
- 1 x 32k SRAM card (for a total of 3 RAM cards (1 x 32k, 1 x 16k + 1 x 8k) in my system)
- 1 x 64k SRAM card that can have the last 8k bank turned off
I would love to hear from anyone with one of the above cards who would be willing to pass it on.
Much thanks for your time.
----- Original Message -----
> Date: Sun, 22 May 2011 22:56:32 -0500
> From: Daniel Seagraves <dseagrav at lunar-tokyo.net>
> Subject: Re: Scraping DEC Equipment
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Message-ID: <C7A98127-DFF4-41B1-A6AF-5DFCA234D286 at lunar-tokyo.net>
> Content-Type: text/plain; charset=us-ascii
> I need a tractor feed assembly for a LA100, are the ones on the 120
Apparently not, but I might have one for an LA100.
I would like to get a Tek 4404 computer going but lack any service
manuals. The system turns on but has no curser on the screen. Has
good power from the Power supply and heater is on in the CRT.
Has a row of LEDs on the mother board. Does anyone know how
to read these.
- Thanks, Jerry
On 7 May 2010, at 08:25, cctalk-request at classiccmp.org wrote:
> Message: 2
> Date: Thu, 06 May 2010 16:06:37 -0700
> From: Al Kossow <aek at bitsavers.org>
> Subject: Re: Servant .953
> To: cctalk at classiccmp.org
> Message-ID: <4BE34B7D.6060902 at bitsavers.org>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> On 5/6/10 2:23 PM, Fred Cisin wrote:
>>> Al Kossow wrote:
>>>> I am interviewing Andy Hertzfeld tomorrow, and had hoped to talk about
>>>> Servant, but I can't find a copy of it around anywhere tonight.
> A huge thank you to Nigel Williams who forwarded a working copy of .951 five
> minutes before Bill and Andy arrived. We spent an hour talking about MacPaint
> and Quickdraw (Apple has finally given CHM approval to make the sources available)
> then another hour on Alice, Dali Clock, Servant, Hypercard, and Magic Cap.
Could you please clarify, the QuickDraw source is available for what purpose? Could developers modify it any include it in heir commercial 64 bit Intel applications for instance?
Is the source Pascal, Assembler, C or something else?
Director of Microspot who has a Carbon application which compiles with over 10,000 warnings about deprecated QuickDraw calls.
The revival process of the 11/750 continues. The power supplies is working
good and then I started testing the actual machine. But that was not a very
smooth journey to success. I have in total at least three complete CPU
board sets and just after quite a lot of board swapping it got running (I
I had error like:
* Bright red error light
* No response at all on the console
* %C microverify error
* %O microverify error
* An hexdump prompt which non like above bot still not correct.
Finally I had the
%% which meant that it passed microverify.
Then I used the (second) RDM module (the first one had RAM error) to run
the DPM and MIC test which passed.
The I ran the "Hardcore VAX instruction test" / TU58#7 which also passed
BUT the Cache / TB diag, TU58#5, give me this:
@?ECKAL -- VAX 11/750 Cache/TB Diagnostic
I am running a BE-S198Q-DE tape image.
Anyone has a listing or description for the ECKAL diagnostic? Is there any
know incompatibilities with certain revisions of boards? Or known bugs?
The machine manage to boot the console tape so I get the BOOT58> prompt.
But I am not sure if that indicate that it is indeed working or not.
So, some help with the Cache/TB diagnostic would be very much appreciated.
When Multics was officially released as free software a couple of
years ago, there was a flurry of activity aimed at getting some sort
of emulator up and running to run it. Did anything ever come of that
or did folks just lose interest (or find out that the needed
GE/Honeywell hardware was too poorly-documented to write an emulator
Well, about two weeks since my last announcement, but I figured I should
do another one.
I've cut a new release of TCP/IP for RSX, and I encourage everyone to
update to this latest release.
A short list of changes since my last release:
. I've worked some on the documentation, and filled out some parts that
were previously TBD.
. Performance improvements. In general, I've improved file transfer
performance by about 20% by tuning when TCP ACK messages as well as
window updates are sent. On links where packets are dropped from time to
time, the performance improvements can be significantly higher.
. Bugfix. Retry counter were incorrectly reset under some circumstances.
. Bugfix. TCP did not resend an ACK if the same data was received twice.
. Bugfix. TCP sockets could erronously be left in a closed state with
no task. However, looking at the socket, it looked like a task was
. Size calculation for stream type files in RSX mode was done incorrectly.
. I've included a precompiled version of PCL.TSK
As usual, the distribution is available from:
The documentation is also available through ftp on Mim, or also at
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
I have two "flippy organizers" (that's around 20 floppies each) full of
these oddball floppies.
https://www.flickr.com/photos/131070638 at N02/22020178558/in/dateposted/
They are 8", hard sectored, and the sectors are on the outer edge rather
than the hub, and there is an odd cutout on one edge that goes inside the
I know I don't have a machine that uses these, so they are available for