test-drb February 2016

test-drb@ccmp.vtda.org

203 participants
239 discussions

IBM 3101-12 ASCII terminal - need fuse holder

by ethan.dicks＠gmail.com

Hello, all, I was just gifted with an IBM 3101-12 ASCII terminal that happens to be missing the fuse and fuse holder. Unlike a lot of 1960s and 1970s gear, it's not round. It's square. Is this a standard IBM thing from the 70s/80s? Anyone know where I could get one? It seems to snap in and probably fell out at some point under its previous owner. Also, I found only a little info on it from Googling. Later IBM ASCII terminals emulated ANSI command or Wyse-50 or something. I couldn't find anything on the 3101. Is it a glass TTY or does it respond to any cursor positioning, etc. commands? Thanks for any tips and info. Worst case, I can bodge in a fuse on the inside, but if I can find a replacement holder, I'd like that more. Thanks, -ethan

8 years, 10 months

928 gig classic computer manuals looking for seeders I am going on vacation Ill see y'all Tuesday

by jnc＠mercury.lcs.mit.edu

> From: Josh Dersch > * slow clap * I myself am waiting expectantly for the Encyclopaedia Dramatica page... Noel

8 years, 10 months

928 gig classic computer manuals looking for seeders I am going on vacation Ill see y'all Tuesday

by tulsamike3434＠gmail.com

By the way I found a 900gig of old computer manuals 1955 - 1992 PDF files just trying to find some seeders grrrrrrr I will let yall know when they are done downloading! -- *Mikes ATC Shop A how To Youtube Channel https://www.youtube.com/channel/UC5OzVS_CmCOLjjztbRiPuKQ?view_as=public 405-481-4715 *

8 years, 10 months

Anyone have DIBOL-11, CTS-300, or CTS-500?

by spacewar＠gmail.com

Does anyone have the DIBOL-11 software, which was packaged for RT-11 as CTS-300, and for RSTS as CTS-500? My immediate interest is for RT-11, though I have a DECdatasystem-570 that I believe was originally sold with CTS-500, so it would be really nice to get that as well. It would also be nice to get scans of related documentation, if anyone has it, including: AA-5519A-TC Introduction to CTS-300 and DIBOL AA-5697E-TC CTS-300 Release Notes and Installation Guide AA-5495A-TC CTS-300 Concepts and Facilities AA-1760F-TC DIBOL-11 Language Reference Manual AA-5972D-TC DECFORM User's Guide AA-5025B-TC CDS-500 DIBOL User's Guide

8 years, 10 months

DEC VT30-H info

by shadoooo＠gmail.com

Hello Henk, thanks for the link. It talk about two boards (one hex and one quad). In effect mine are hex and quad. But the hex board has three IDC connectors, while the quad only two. My suspect is that the third connector could go to some other module. Do you have the VT30-H system too? Could we compare the boards? About documentation: I can't find the Option Bulletin cited on the text. Thanks Andrea

8 years, 10 months

PCS Cadmus/QU68000 systems

by Arno_1983＠gmx.de

> Hi, > > Is anyone interested in PCS Cadmus/QU68000 systems? We at Hack42 have no > idea what to do with them. We need to downsize and these take up a > significant amount of our space. > > See http://dev.ramdyne.nl/IMG_2750.JPG for photograph of the stack. > > If you know other people who are interested in beasts like these, please > pass this information on. > -- > Andreas Looks like interesting machinery from a German manufacturer! There is a short blurb about them on de:wp (https://de.wikipedia.org/wiki/Cadmus_Workstations) saying the PCS QU68000 were based on (who'd have guessed...) a 68000 processor on a QBus (!) while the later models sold under the CADMUS trademark held 68020/030 and, from 1985 on, MIPS RISC processors. They ran MUNIX, a V7 UNIX derivate, with some quite sophisticated cluster integration (network boot, "Newcastle connection" common superroot namespace, networked block devices) enabled by a board called the Intelligent Communications Controller. The outfit even still seems to stick around here (https://www.pcs.com/en/company/history/the-history-of-pcs/), albeit manufacturing access/time registration/industrial data terminals nowadays. As usual, if somebody from Germany conducts an operation on those and doesn't know where to put all of them, I'm willing to help out with collecting and re-homing. (I may also have an opportunity to collect a couple of them in the Netherlands if there are any left by/can be held onto until end of May 2016. I'd wish for one of each significantly different type but this is not a reservation but a "last resort" deal if they'd go to trash otherwise. Basically, if anyone else comes along offering a good home for them, I'm happy to stand back.) TIA, Arno

8 years, 10 months

Possible HP 250 available in Germany

by sieler＠allegro.com

Hi, There may be an HP 250 available in Germany. If interested, please email me directly, sieler at allegro.com thanks, Stan

8 years, 10 months

Kim 1

by uribecosta123＠gmail.com

I have a Kim 1 board. Please contact. Thanks.

8 years, 10 months

Old MOS Mask-Programmed ROM forgetfulness?

by rickb＠bensene.com

Hi, all, I have a question about old Mask-Programmed ROMs The part in question is the National Semiconductor MM5231. This part is a 2K-bit PMOS Mask-Programmed ROM, generally organized as 256x8, but also can be organized (via a MODE pin)as 512x4 bits. In this particular application, the parts are used as 256x8. I'm wondering if anyone knows if these particular ROMs (from the '72 timeframe) have a tendency for bit rot over the years? I know some of the early MOS ROMs had issues with metallization creep that would cause data loss/corruption. I have an old calculator that uses these ROMs as the micro and macrocode stores. The machine is catatonic, though the power supplies, master clock oscillator and divider circuitry, and the other obvious stuff are OK. I suspect it is probably stuck in some kind of microcode loop, just cycling around doing nothing. I have not yet put logic analyzer on the microcode latches yet, but that's probably my next experiment. Sadly, if one or more of these ROMs (there are 18 of them!) has failed, it likely means that the machine can't be restored to operation, as this is quite a rare machine, and there just aren't many of them left around. I have three different EPROM programmers, but sadly, none of them have the capability to read these parts. I was I had a Data I/O programmer, but alas, haven't come across one with all the Unipak modules I'd need at a price I can afford. Thanks, -Rick --- Rick Bensene The Old Calculator Museum http://oldcalculatormuseum.com

8 years, 10 months

DEC VT30-H info

by shadoooo＠gmail.com

Hello, I just acquired two DEC modules, M8295 and M7114. These appear to be a video system for unibus, named VT30-H. I don't find any info about these boards... There's some documentation around? Is the system complete or some other card is required? Thanks Andrea

8 years, 10 months

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test-drb February 2016