Recently, I've been reading up into AS/400s.. They seem like really neat machines, and look really sharp with those matching block terminals.
I remember retail stores using those, and I always wondered what kind of a system they were running on... I figured it was DOS!
I've been having trouble locating one, however.
Anybody have one lying around, or know of where to find one in the Toronto area?
It needn't be a high spec machine, just something to play with OS/400 and a terminal.
So I've been informed that a pair of PDP-11/04's are available, Chicago US
area. The price isn't set - someone else has offered the owner ~$400, which
seems a bit low to me (although I don't know what peripherals/memory are
included, if any). One is in a 5" box, and one in an 11"; both apparently
include the basic "Operator's Console" (i.e. halt and reset toggles). Contact
Patrick Lynn at 815-838-0134 if interested.
Well I managed to find some suitable rubber tubing and
glued it in place of the nasty black mess.
So I put everything back and turned on. Lo and Behold LED on the board
flashed once and stayed on.
I had been told (Tony D I think) thats what its supposed to do.
Anybody know whats the quickest way to test a TU-58?
A few years ago I entered the schematics and laid out a design for the
serial board option for the TRS-80 PT-210 printing terminal using gEDA.
I found the schematics in a hardcopy of the service manual. I
revisited the project a couple of days ago and reentered the schematics
into Kicad. I remembered that the reason I never made the board was that
I was unsure of its correctness. The schematics and foil patterns
contradict slightly and a couple wires seem to be missing from the
Does anyone here have a PT-210 with a working serial board? I would like
to work with you to beep out various points so I can figure out what's
I also found a Youtube video showing a PT-210 with the serial board in
action. See https://www.youtube.com/watch?v=FPxpzcFXh-0
 Scanned and uploaded to
dave at 661.org
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
Q: What is the most annoying thing in e-mail?
I?m looking for some help diagnosing a old Grid server problem,I am a hobbyist learning my way around old computer systems .
The system consists of three boards labeled
Each board contains a 80186 , ram and rom and are all connected via a backplane.
The diagnostic server has rs232 port and a connector to a small led display.
The file server has a GPIB port and a something along the lines of a SASI port
The com server has what i believe to be several rs232/422?s ports at least
What i know works is the diagnostics server and the file server as i can interact with the diagnostic server via a serial terminal and the file server attempts to boot from a gpib floppy but i have no boot media that will boot it.
The problem is with the com server board, when the system initializes the diagnostic board does a self test then looks for other boards on the system it finds the file server board but does not find the com server board.
If i remove the the file and com server and power them out of system, reset the processor?s and then probe the different signals they appear to be operating the same,clk activity , data and address buss activity is identical. When i put them in the system and watch the file and com server boot it looks like the com server get stuck when it goes to send its data to the diagnostic server. I'm just a amateur at these things, i am looking for help to point me in the right direction. i made a small video of a typical data line at boot the first is the file server then the com server where you can see it get stuck , this is typical of all the signals that i test.
This email has been checked for viruses by Avast antivirus software.
OK so this has been bugging me for a while. During a stint working at
Morgan-Smith Electronics in Hatfield UK (they made diverse electronic
systems including industrial PCs and radio alarms) I went through the
boss's discarded vintage computer magazine collection and one particular
issue I remember finding very interesting.
IIRC it was a Byte Magazine (certainly the graphic was very in keeping with
Byte cover artwork). I wonder if anyone recalls it - Google image searches
have pulled a blank which means it either wasn't Byte (and just looked like
it) or hasn't been scanned.
The cover had a painted image of a white cliff face draped in vines with an
'Adventurer' in the foreground - you can imagine what the theme was. Anyone
have any ideas? Maybe it wasn't Byte?
Of course all this really quite irrelevant in the grand scheme of things,
but it would help me scratch an itch at the very least.
[Yahoo's webmail client garbled the last link -- resending]
The revived 2013 re-issue of Niklaus Wirth's Oberon system is a joy to behold.? If you've never heard of Oberon before, it is a minimalistic education-oriented language and operating system designed after Wirth had taken a (second) sabattical at PARC in the 80's.
The new version runs on a custom RISC processor, implemented in an FPGA, instead of the NS3032 in the orginal Ceres workstations.?? Originally, it required a Digilent "Spartan 3 Starter Kit" with a custom-built daughterboard providing a few additional connectors.? This board is no longer made, however, and no other FPGA development board appears to provide the 32-bit wide fast SRAM the Oberon CPU required.
Recently, a new board, the OberonStation,? has come onto the market that was designed specifically for Oberon, and will boot up Oberon 2013 out of the box.?? It also looks like an excellent platform for other retro-style FPGA CPU designs that want to stay away from complex SDRAM controllers and the caches they like to feed.
My OberonStation arrived a couple of days ago, and it's really amazing to see what can be done with a hardware and software stack that is small enough to actually read and understand.
I purchased a Microvax 3800 a few weeks ago. I have not really had the time
to really take a good look at it until now. I still do not have the needed
power cord to power it Up. Looks like a standard PC power cord with a notch
in it. I found a place that sells them online, still waiting for it to get
I was told the machine was removed from working service, however it looks
like it has been sitting for quite some time. The hard drive, hard drive
controller, and tape controller have been removed.
I purchased a m7769 DSSI controller card online, so that is one more step
in the direction of getting the machine all together. Still waiting to find
the controller for the tape drive and a dssi hard drive, although they look
to be pretty affordable on ebay.
Just figured id post about it here, to show my progress twords getting it