test-drb December 2018

test-drb@ccmp.vtda.org

174 participants
203 discussions

50Hz Pulley for 8" Floppy Drive Mitshubishi M2894-63B

by thomas.riesen＠predata.ch

Hi all Any suggestions where to find two 50Hz-Pulleys for the 8" Floppy drive Mitsubishi M2894-63B? If there also the appropriate ribbon gummies available, I would be very happy. Regards Thomas

6 years, 10 months

Data Systems Design DSD-4140 microcode PROMs

by jzatar2＠illinois.edu

Hello Everyone, We found a PDP-11 QBUS card cage with a KDF11 and some other cards (RAM, ROM, some basic peripherals) which included a DSD-4140 card. Unfortunately, the DSD-4140 is missing one of it's microcode PROMs for some reason. Does anyone else have one of these cards? It'd be really helpful if we could get some dumps of the 4 microcode PROMs so we can compare what we have and look into replacing what we don't have with an adapted modern part. (and if anyone goes to the trouble to read the 4 microcode PROMs, there's also an 82S137 that deserves to be dumped). Here's a picture of the card in question: https://i.imgur.com/tzYjPYF.jpg Regards, Joe Zatarski

6 years, 10 months

8-Update

by pbirkel＠gmail.com

>I have an .slt for the PDP-8/e lever >Rod Please publish/share? paul

6 years, 11 months

mainframes and other stuff

by sales＠elecplus.com

Mainframes and other stuff Recycle center in NC is willing to save out "stuff" for people. No, no one can go in the back and scrounge. No, he does not want a lot of emails from people. Yes, he gets big blue and orange and beige 6 foot tall OLD mainframes in all the time. They squash them at the moment. Yes, he will package small orders, and will properly palletize larger orders. Local pick up will be available after the new year. So, if u can send me a picture with description and some part numbers, along with what you want to pay, I will consolidate things and make arrangements. Please don't ask for specific boards from DEC; they don't want to go into that much detail. QBUS will mean nothing to him. Big orange cabinet that says xxxxx is much more likely to get saved. They are moving to new warehouse 1st of the month, so all this will start happening after the 1st of the year. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-792-3400 phone 830-792-3404 fax sales at elecplus.com AOL IM elcpls

6 years, 11 months

How to refurbish plotter pens?

by mattislind＠gmail.com

I am about to get our IBM1627 (rebranded Calcomp 565) going but the pens in the case is quite dry. What is the best method to refurbish those? What is the best solvent to get the old ink out? What ink to refill with? https://drive.google.com/open?id=0B-rp4vyPPYu1ZjVRbnlyczV4czQ

7 years

Old HP stuff

by sales＠elecplus.com

Thanks for all the replies! Based on the responses I got, this is the specific request list that I just emailed him: anything HP 1000 related is interesting. HP 2100, HP 21MX 2113 2117, A-Series A400 A600 A700 A900 A990, etc. are all 21MX/2100-series: HP 12908A Writable Control Store Interface Kit (PCA 12908-60002) HP 12908B Writable Control Store Interface Kit (PCA 12908-60006) HP 12908-60003 Jumper Board Assembly HP 12908-60005 Backplane Jumper Assembly HP 12908-60008 Jumper Board Assembly HP 12978A Writable Control Store (PCA 12978-60006) HP 12978-60006 Jumper Cable Assembly HP 02100-60018 Cable Assembly (need two!) HP 02100-60052 Connector Assembly an HP HIL mouse (so not PS/2), preferably 3-button HP apollo 735/125 power supply part # 0950-2081 (Astec). It comes from a workstation, A2608A or A2841A HP 9000, whether it's the /200, /300, /400, /700, or /800 series The prices I see for this equipment online are stiff! May I assume (and yes, I know what that spells) that you guys are looking for machines in the sub $200 class, not $2000 like some sites have posted? Equipment from the recycler is so much cheaper, but strictly as-is. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sales at elecplus.com --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

7 years

VueSCAN

by cctalk＠ibm51xx.net

Does anyone know if old versions of VueSCAN worked on anything below XP (e.g. Win 9x, 2K or even gasp 3.x)? Thanks. -Ali

7 years

Which DEC machine made use of th pre Flip-Chip board?

by jnc＠mercury.lcs.mit.edu

> From: Mattis Lind > I cannot figure out which early machine it comes from. They're called 'System Modules': http://gunkies.org/wiki/System_Module and they were used from the PDP-1 through (I think) the PDP-7; at least, this PDP-7 internals image: https://www.soemtron.org/images/jpgs/decimages/sn113robertjohnson85680004.j… seems to show System Modules at the top, and FLIP CHIPs at the bottom. (I'm pretty sure even the first PDP-8 - the 'straight 8' - uses only early FLIP CHIPs - transistorized ones.) The DEC brochure for it (P5141) is a little puzzling; it says (p. 2) that "INTEGRATED CIRCUITS are basic elements of the low cost, newly designed silicon FLIP CHIP modules used throughout PDP-7", but AFAIK, the first FLIP CHIPs (R-series, B-series, etc) were all transistors; the later M-series were the first ones to have ICs. Maybe this is some old meaning of "integrated circuits"? Noel

7 years

wanted back issues IEEE ANNALS OF THE HISTORY OF COMPUTING bound or unbound... dtop us a line off list please.

by couryhouse＠aol.com

wanted back issues IEEE ANNALS OF THE HISTORY OF COMPUTING? bound or unbound... dtop us a line off list please.... ed#? SMECC Sent from AOL Mobile Mail

7 years

PDP-11/45 RSTS/E boot problem

by fritzm＠fritzm.org

Hi all, Some here may know I?ve been working on an 11/45 restoration off and on for some time now. My ?45 currently has floating point, KT11-C mem mgmt, 124 kword MS11-L, and an RK11-C with one restored RK05 drive. Last week I decided to see if I could bring up RSTS/E on the machine. I managed to sysgen a minimal V06C system that can run off a single RK05 pack under simh, but when I transfer that image to the real hardware using pdp11gui it does not seem to completely/successfully boot. The ?Option:? boot loader comes up and sub-commands there seem to be working (in particular, the ?HARDWARE? sub command shows correctly detected hardware and options). When booting RSTS/E, after supplying date and time, the idle pattern starts on the front panel (but just the bottom part, on the data lights). When console is in display register mode, it shows an increasing count. Console input is echo?d, but the INIT banner and subsequent prompts are never printed and the read light on the RK05 flickers continuously as if the system is trying to read the same sector over and over. Figured I?d ping here in case this is a known failure mode to folks more familiar with RSTS/E? Also posted over on the vcfed DEC forum. FWIW, the machine is passing all MAINDEC CPU, MMU, FP, KW11, and RK11 diagnostics. Cheers, ?-FritzM.

7 years

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test-drb December 2018