Just wondering if anyone knows what these chips are for/from/etc.
http://www.ebay.com/itm/152124208945
Interesting look to them. I would say EPROM but the magnifying window is weird...
-Ali
After getting my TRS-80 Model II keyboard repaired and up & running last week (http://www.insentricity.com/a.cl/257), I've been messing around with the Kermit source code to see if I can add hardware flow control support. I'm able to build Kermit using LASM on CP/M or on an emulator, but it would be nice to be able to setup a Makefile so I can do the build directly on Linux.
Is there a LASM compatible assembler out there with source available that I can run on Linux? I've tried a whole lot of different ones that are capable of doing 8080 & Z80 assembly, but not one understands the syntax of LASM (or I'm just not running them with the right flags).
I've tried so far:
z80asm - http://savannah.nongnu.org/projects/z80asm
as - http://john.ccac.rwth-aachen.de:8000/as/index.html
kio's zasm - http://k1.spdns.de/Develop/Projects/zasm/Distributions/
zasm - http://lpg.ticalc.org/prj_zasm/
z80-asm - http://wwwhomes.uni-bielefeld.de/achim/z80-asm.html
z80pack - http://www.autometer.de/unix4fun/z80pack/
Alternately, is the source code for Ward Christensen's LASM available anywhere? The best I could find was a note from a Kermit developer from 27 years ago asking for the source. I suppose I could use a disassembler, but then I don't have proper labels or comments.
--
Follow me on twitter: @FozzTexx
Check out my blog: http://insentricity.com
So I previously:
http://www.classiccmp.org/pipermail/cctech/2015-June/006953.html
wrote:
>> I see 'three' different kinds of 'UNIBUS to cables' cards listed:
>> M9014 UNIBUS to 3 H854s
>> M9015 3 H854s to UNIBUS
>> M9031 UNIBUS to 3 3M cables for 11/74
>> M9042 UNIBUS to 3 H854, Dual
> So I have compared an M9014 and an M9042; the former is a 'normal'
> height dual module, the latter is a 'short' dual module. I suspect that
> they have the same pinout on the Berg headers; I tried a couple of
> UNIBUS signals, and they led to the same pin on the Bergs on the two
> different units.
> If and when I get energetic I will make a complete pinout list for the
> two units (I haven't been able to find any documentation on any of them
> online).
I have completed this pinout list, and it is now documented here:
http://gunkies.org/wiki/UNIBUS_H854_header_pinout
I have also verified that both the M9014 and M9042 use the exact same pinout.
If _anyone_ has either an M9015, or an M9031, can they please let me know?
I'd like to document exactly what they are.
(I have this sneaky suspicion that the numbers were allocated, but the cards
never built: for the UNIBUS, unlike the QBUS, you can use the same card on
each end of a set of flat cables - that's because the UNIBUS dual connector
does not have separate 'grant in' and 'grant out' pins, unlike the QBUS.)
Since BC11A cables are now very hard to find, and the white flexible printed
circuit flat cables (I think that's the correct jargon, can someone please
correct me if I got that wrong) used in them is probably not obtainable now
(outside a special order), I suspect we may soon be using pairs of these
cards (they are very simple), along with a 3-set of 40-conductor (2x20 pin
headers) in place of them.
But that's for another day!
Noel
Hi folks,
Got a couple of Apple ][s that were rescued from a steelworks outbuilding
and as usual they have ASTEC power supplies with .1uF and .01uf RIFA
look-at-me-and-I'll-explode caps in and I'm running out of spares.
What's the current considered replacement for these? There seems to be a
wide range available with even wider ranging prices from EVOX, VISHAY,
MATSUSHITA, PANASONIC (ok, matsushita again), Iskra, KEMET etc.
Drowning in options, not just heavy rain :)
--
Adrian/Witchy
Binary Dinosaurs creator/curator
Www.binarydinosaurs.co.uk - the UK's biggest private home computer
collection?
Hi all,
anybody know, which system used it?
It is a 1986 CRT controller, which was pretty fancy
back then. But never saw actual hardware with it ...
Thanks
>
> From: Don North <ak6dn at mindspring.com>
> Subject: Re: UNIBUS M9312 ROMS (Don North)
> Message-ID: <498c12dd-437a-31ce-0a04-4602e50f6f55 at mindspring.com>
>
> There is a three PROM set 23-86[234]A9 for device code XM which is DDCMP
> boot
> over a DMC11/DMR11. Those PROMs are available and on my web page.
>
> I am not aware of the four PROM set you mention, but it could certainly be
> a
> custom one for that application.
>
> --
> Don North
> AK6DN
>
>
I looked in my notes. The 11/34s and KL10 talked through DMR11-ACs using
the megabit COAX interface. Maybe the three PROM version that you have is
the right one for this configuration, and there was another PROM on the
M9312.
--
Michael Thompson
So there was some prior discussion on the list about using the later 1MB
M8750 cards (used in the VAX-11/750, /730, etc) in the MK11 memory of a
PDP-11/70:
http://www.classiccmp.org/pipermail/cctech/2015-March/003598.html
However, that seems to require some kludgery in the MK11 (sending 4 separate
'board select' signals to a single memory card, etc).
I'm interested in using the 1MB M8750 cards because the smaller 256KB M8728
cards (which the MK11 _will_ take, although there's very little about that in
extant DEC documentation) are now seemingly unobtainium.
(Almost all the MK11 documentation that I have only talks about the 64K
M7984. The only one that does mention the M8728 is the -11/70 Maintenance
Service Guide, KA-K1170-MG-003, and it doesn't say much, just indicates that
one just plugs them in, and the controller recognizes them. So I've been
studying the prints to see how that all works - there are per-slot/board
'personality' lines the MK11 can read.)
The thing is that M8728 cards use the exact same PCB as the M7850 - in fact,
there are lots of 'M8728' cards listed online, because it says 'M8728' in the
etch, but they are in fact M8750's (as shown on the handles)!
So I had a brainwave: why not use M8750's, but jumper them to look like
M8728's? I'd only be using 256KB of a 1M card, but I can live with that (I
just bought a giant stack of M8750's for a fairly nominal amount). It would
let me use the M8750's without having to do hardware mods to my MK11.
So, has anyone here ever worked out how to use M8750 cards in the MK11 in this
manner?
It looks like all one has to do is i) figure out how to jumper the M8750 to
look like an M8728 (there is no documentation on the M8728 extant, AFAICT),
and ii) make sure that the A7 pin to the 64K RAM chips of the M8750 is driven
consistently to either '1' or '0' (it looks like there's a jumper in the A7
drive line, and one could connect the appropriate post of that jumper to
ground to do that).
So, if someone has done this before, or, failing that, if anyone has M8728
documentation (although I can get the M8728 jumper etc info off an M8728 I
have coming, if not), I would be extremely grateful!
Thanks in advance (I hope :-)!
Noel
I'm investigating getting MULTOS/8 running on the 8/e here at the museum and I thought I'd start by getting acquainted with it on SIMH.
I've picked up the disk pack from Dave Gesswein's site here: https://www.pdp8online.com/pdp8cgi/os8_html?act=dir;fn=images/os8/multos8.r… and the manual here: http://www.pdp8.net/os/multos8/
MULTOS as currently configured on the RK05 image appears to be set up for two terminals and everything listed in BUILD looks to agree with respect to the SimH hardware configuration. I set up a password file per the instructions, and after I set the DATE, I do an:
.R MULTOS
And am greeted with:
HELLO !
THIS IS THE MULTOS/8 MULTI-USER OS/8 TIMESHARING SYSTEM
CREATED BY COMPUTER METHODS
7822 OAKLEDGE ROAD
SALT LAKE CITY, UTAH 84121, USA
PHONE 801-942-8000
PLEASE INPUT TIME IN 24-HOUR FORMAT
(E.G. 0925 FOR 9:25 AM AND 1935 FOR 7:35 PM):
1601
THANK YOU !
THE SYSTEM IS NOW TIMESHARING
TYPE CONTROL/H TO LOG ON.
At this point, the system becomes unresponsive; CTRL-H appears to have no effect. AC and MQ seem to be incrementing over time as the docs describe.
I've poked around and in PARAM.PG, the address of TTY #2 is set to 32 (VT78?), rather than the 40 I'd expect. I changed this and reassembled the JOBS device handler, and then used BUILD to rebuild the system using it. I'm still getting the same behavior, however...
I have a bit of experience with OS/8 (but I'm not an expert) and nearly zero experience with MULTOS, so before I start debugging in SimH I thought I'd check to see that I'm not doing anything intensely stupid here...
Thanks!
Josh
I just dig out this little thing form my father stash of various stuff.
Had to replace the input filter module since there were a small cloud when
powering it up. It also left fair amount of thick smelly tar in the
machine. But the exact replacement were still to be found some 30 years
later.
The little thing is driven by a 68B09 processor, some ROM and RAM and a big
NEC ship marked "Informer". Maybe a custom ASIC. The screen is a Lohja /
Finlux 512x256 EL display.
When bringing up the setup screen it does not look like the one in the m
<https://www.jefftk.com/informer-213-ae-manual.pdf>anual. It looks more
IBMish.
http://i.imgur.com/7EX5uTz.jpg
It says 374/SNA - Rev 2.1
Does anyone have a more non-IBMish firmware set (or is there some other way
to make it more VT100)? A 27256 and a 2764 goes into the terminal.
There is a Youtube video, https://www.youtube.com/watch?v=CvPR8UypXNw , on
a Informer 213 but the firmware seems to be different (at around 1:31).
/Mattis
I wanted to reactivate a TI Professional Computer (TIPC) and all I get
some seconds after powering it on is the message
"** system error ** 0004"
and a beep, lasting for about 2 seconds.
The TIPC is an early, not really compatible clone of the IBM PC 5150. I
wonder if I need to do some reengineering and/or disassembling or if
there is a service manual out there.
greetings,
Martin
--
Martin Peters
martin at shackspace.de
