I have three AlphaServer 2100 systems in storage in the UK
(Oxfordshire). The storage, however, is due to be demolished (soon, but
no fixed date).
I won't have room to store these three systems, so if anyone would be
interested in offering them a home, then please get in touch!
I can probably get some pictures in the next day or two.
These systems were SMP Alphas and could sport as many as 4 CPUs. I'm not
sure of the configuration of these systems but I can probably find that
They have not been run since ~2003 so they may be in need of some TLC.
OTOH they are not rusted to death so you have a chance of getting them
back to life.
Just so you know what you might be dealing with these systems are about:
700mm H x 430mm W x 810mm L.
I can't find the weight in any of my references right now but they are
very heavy. Three people can move them up a slight slope with some
effort but you would not successfully lift it into a car (assuming that
it would fit). I'm planning to dismantle them to move them (i.e. remove
PSU/PSUs etc. until they are light enough to move). A tail-lift would
probably be the sane way to go (and is, indeed, how they got to their
I'm hoping that someone can step forward and offer one or more of these
machines a new home. Please contact me off-list (once you're sure you
understand what you are getting into :-)).
antonio at acarlini.com
The recent discussion on BSC protocol prompted me to dig out my Microvax 3100
with DSH32 synchronous serial interface. It had been idle in storage for
several years and it wouldn't power up, only giving a brief flash on the
diagnostic LEDs and a quick twitch of the fans. There was a slight smell, like
the stale air that comes out of a deflating tyre.
I took out the H7821 power supply and found that five identical brown 1800uF 25V
electrolytic capacitors on the output side had leaked.
The SCSI disk enclosure where the machine's system disk lives required several
power cycles to get it to run at all and it died as soon as the disk tried to
spin up. It turned out to also contain a H7821 power supply which had a
similar issue with the same five brown capacitors, although not as extensive
as in the main unit.
I found a second disk enclosure which had seen little use and grabbed the power
supply out of that to put in the MicroVAX. It worked well enough to test with
but there was a ring of goo around the bottom of one of the brown capacitors
which was worst affected in the other units. Time to order a batch of
replacement capacitors and figure out what else has been damaged. While it is
not the worst I have seen, access to these power supplies for repairs is quite
difficult and it is really difficult to debug them safely while they are
running with the cover off :-(
If anyone has anything with H7821 power supplies in them, I suggest checking
on these capacitors. If anything with these power supplies is in storage, I
suggest ensuring it is stored the normal way up as this should limit the
ability of the goo to escape and spread around the power supply.
And there I was thought I was being safe enough by removing the nicad battery
packs some years ago...
I'm testing a little BlueSCSI adapter (BlueSCSI <https://scsi.blue/>) which
while being aimed at 68K Macs should also work as an 8 bit target for older
VAXen, it's a newer cheaper SCSI2SD solution and I should point out it
works as intended on a Mac Plus so the module itself is fine.
Nobody appears to have tested on small VAXen yet so tonight I dug out my
VLC to give it a go.
Powering up with nothing attached apart from an MMJ/H8571 cable I get
nothing on the console, I'm using PuTTY via a genuine COM1 port on a PC
which is one level above what I used last time I powered the machine up
(FTDI USB adapter to a laptop). Diagnostic LEDs cycle through the tests and
end up at '1111 0011' which according to the manual is 'entering the
Clearly the DALLAS has passed the TOY tests, but if it's not happy would
that stop the console displaying? It doesn't matter how I set S3, next step
I guess is to hook it up to a 'proper' VT.
Owner of Binary Dinosaurs, the UK's biggest private home computer
t: @binarydinosaurs f: facebook.com/binarydinosaurs
Is there a simh for the otrona attache? I have some.disk images created
with Dunfield's utility..if not I will try to read them by using the Zorba
portable, which is pretty good with varied formats.
I found a vintage rackable linear PSU at a sale over the weekend, appears
to be late '70s vintage going by date codes on some of the high-power
Front panel is plain black with just a power switch and telltale lamp.
Back has a ratings sticker which says "PPI 1247-000-91 ADDS".
Outputs are +24V at 3A, +12V at 2A, +5V at 30A, -12V at 4A.
Ring a bell with anyone? I'm familiar with ADDS in a terminal context, of
course, but this lump is obviously for something larger - perhaps a
"washing machine size" fixed/removable drive unit or similar, but I'm
surprised there's not obvious branding on it if so.
Long time lurker, extremely rare poster, I was reading the Wikipedia
article on the IBM 1620 and became quite intrigued. I know that there is a
simulator for it on SimH but I have never ran or simulated any card-driven
machines before. I have all the documentation and the ibm1620.zip file
>from bitsavers but I am not sure what to do next. I know I would like to
try Monitor, Fortran-II and possibly GOTRAN but I have so many questions.
I read the SimH documentation which gave me some understanding but I don't
know exactly how the card decks work, how to install Monitor or how to boot
Monitor once it is installed since I know you have to boot off a deck. My
final question is, is there an easy to use card-driven machine to cut my
teeth on? Also, any anecdotes on any of the old IBM computers would be
both welcome and greatly appreciated.
Thanks in advance
Its been fun? working with Ultrix-11 and have had success with the help
of the list.? Thanks.? The tape file from Bill Gunshannon will create a
working system.? Yay!
I'm at the point of trying to network the SIMH pdp11 Ultrix-11 system.
I have a few observations:
1. The youtube video 'Ultrix-11' shows connecting to sunOS systems. OK,
he did this by simply issuing a single ifconfig command.? That didn't
work for me.
2. Instead, I used the netsetup script supplied with the system, and had
to reboot to get networking up.? I did seem to come up OK.
3. The SIMH FAQ suggests using a 2nd ethernet port, I was able to do
this.? The linux computer I am running SIMH on has 2 ports.
4. The Ultrix-11 telnet ftp are old, unsecure versions, how do you
connect to a modern Linux machine?? The Linux machines refuse the
5. I also looked at the tuhs archive.? The Fred build script that
generates a tk50 bootable tape image didn't work for me.? I substituted
a file for the tape device and it caused SIMH to Halt.
I've written a Venix/86 userland emulator. It uses FreeBSD's vm86 to run
binaries natively and intercepts traps for things like system calls. I
finally have it to the point where it can run the compiler via cc (which
forks and execs c0, copt, cpp, as, ld, etc). My plans to try to recreate
the sources for the binaries for Venix/86 from V7 and other extant sources
have taken a step forward. Don't know if I'll ever get there, but at least
I don't need a working Rainbow and can run the compiler at ~4GHz rather
has my latest blog entry on it. The code lives in tools/vm86venix in my
https://github.com/bsdimp/venix repo for those that want to take a look. It
uses vm86 mode of 32-bit intel processors and traps all INT xx and other
privileged instructions and provides appropriate emulation... And the
compiled binary is smaller than the venix kernel (but it does less).
Back in the 2007 time frame, Andrew Lynch had written a utility to read
Vector Graphic hard-sectored diskettes on a Catweasel board. Called "CWVG",
does anyone have a copy of the program?
Mike Loewen mloewen at cpumagic.scol.pa.us
Old Technology http://q7.neurotica.com/Oldtech/