test-drb April 2008

test-drb@ccmp.vtda.org

196 participants
307 discussions

FS: QBUS boards, 4K memory boards, Sharp PC-3000 items

by julianskidmore＠yahoo.com

Hi Ed, I've been trying to use my BA23-based microPDP11/73 recently. I got as far as installing RT11 and Fig-Forth :-) , but then the power supply blew a cap so everything has been mothballed since Friday! > DEC "A/D FOR 1103 5012094E-P2" My guess is that the A/D won't work if it's for an 11/03 > DEC "4 CHANNEL D/A A6001 5012107 DP4" But the D/A sounds interesting! > DEC "PROG REAL TIME CLOCK M7952 5012108B" As does the RTC. > DEC "M9060 5017109" load board As does the Load board - I guess that board is there to simulate loading on a PSU so you can test the PSU? Obviously I'm happy to pay for the postage, in fact is sounds like good value! -cheers from julz @P ____________________________________________________________________________________ You rock. That's why Blockbuster's offering you one month of Blockbuster Total Access, No Cost. http://tc.deals.yahoo.com/tc/blockbuster/text5.com

16 years, 1 month

Help with ICL power supply fault (Farnell SMPS)

by RodSmallwood＠mail.ediconsulting.co.uk

I can't be of much help re PSU . However I do know the machine. RAIR were a customer of mine and I saw the first one ever built. RAIR was run by two guy's called Mark Potts and David Fogden. Mark went to the States and I have no idea what happened to Dave. Rod -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of John S Sent: 08 April 2008 12:22 To: cctalk at classiccmp.org Subject: Help with ICL power supply fault (Farnell SMPS) Hi, I have an ICL PC2 CP/M box (like this: http://www.old-computers.com/museum/computer.asp?c=752) which has a faulty PSU, I am hoping someone here can advise me. The PSU is a Farnell N100/F4190 SMPS, looks like a high quality unit with nice screw terminals for mains in and DC out. When fired up with 240V AC and a dummy load the output voltages are: 12V output=1.1V 5V output=2.3V -12V output=-5.9V The other worrying thing is it is also drawing 100W power (measured with a one of those plug in mains meters from Maplin), whilst the dummy load is around 20W (split between +12V and +5V). I've checked all the capacitors with multimeter and ESR meter, and all seem fine, and none are bulging or obviously overheating, DC resistance on each of the output connections to ground is around 60 ohm. I couldn't find a short so I don't know where all the power is going to, I suspect there is some protection circuit kicking in? I don't have a circuit diagram, so my first plea does any one have one please? The circuit has few ICs, and mostly transistors. There is a CA339E quad comparator chip, and a IL201 opto isolator (I'll try and check these), but no nice single IC controller. My current strategy is to apply +5V to the comparator chip and apply voltages to the output to try and see some feedback, and also apply 50V DC to the input in the hope this is enough to start up the oscillator (I think this is a small group of transistors, resistors and small capacitors near a small torial transformer, which then feeds to the main conversion transformer). Any suggestions gratefully received, Thanks, John _________________________________________________________________ Get Hotmail on your mobile. Text MSN to 63463 now! http://mobile.uk.msn.com/pc/mail.aspx

16 years, 1 month

HP-21xx assembly

by Tim＠Rikers.org

Is there a pdf version of jeff's asmref.html? mirror: http://rikers.org/hp2100/jeff/asmref/index.html with some edits: http://rikers.org/hp2100/asmref.html I've been fixing obvious errors, but I'm not sure if the errors were >from OCR or in the original. Also I don't have the diagrams in there >from the original docs. I'm looking for docs on the REL tape format(s) to add support to asm21.pl The relocatable library docs don't seem to cover the tape format itself, just the calling convention etc. http://bitsavers.org/pdf/hp/21xx/02116-91780_RelocatableSubroutines_Oct1973… Pointers appreciated. :) -- Tim Riker - http://Rikers.org/ - TimR at Debian.org Embedded Linux Technologist - http://eLinux.org/ BZFlag maintainer - http://BZFlag.org/ - for fun!

16 years, 1 month

Sun keyboards available

by mcguire＠neurotica.com

A friend in Maryland has 13 (yes thirteen) Sun type 5 keyboards that need to find a new home. He is asking $10 plus the cost of DHL ground shipping for the lot. He needs them gone by Thursday 4/10 or they'll hit the trash. Email me for his contact information. -Dave -- Dave McGuire Port Charlotte, FL

16 years, 1 month

VCF/Midwest - Just 3 weeks away

by pat＠computer-refuge.org

In case you hadn't noticed yet, this year's Midwest VCF is just under 3 weeks away - April 26 and 27. We still are working on getting exhibitors and speakers for the event - drop me a line if you're interested in either. Sign up to exhibit soon! Vince Briel will be at the event this year, doing a Micro-KIM and Replica One workshop. More details at: http://www.vintage.org/2008/midwest/ Pat -- Purdue University Research Computing --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

16 years, 1 month

VT14 engr drws

by aek＠bitsavers.org

they are part of the GT40 drawing set http://bitsavers.org/pdf/dec/graphics/GT40_EngrDrws.pdf

16 years, 1 month

VR14 Engineering Drawings?

by ohh＠panix.com

Hey, all: Does somebody out there know of a set of DEC VR14 engineering drawings they could point me to online? Thanks! -O.-

16 years, 1 month

advent sources?

by bqt＠softjar.se

"Zane H. Healy" <healyzh at aracnet.com> skrev: >> trolling through some old mit backups... >> >> I found a copy of "advent" fortran source from 1979. Is that interesting >> to anyone? It looks more complex than the Crowther sources but I have >> no idea. >> >> I also found a file with PDP-6 Space war sources. Anyone interested? >> It mentions a "340" display. It's an ITS "ar" file which I think would >> be easy to pull apart back into ascii files. >> >> -brad > > Any chance of a copy of DND in there? Especially for RSTS/E or RT-11? I'm > aware of what is at http://members.tripod.com/~rancourt/default.htm I have atleast ADVENT compiled and running under RSX. Should work fine under RSTS/E as well. Just check on MIM::SYS$GAMES: Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol

16 years, 1 month

RSX-11M sysgen

by mcguire＠neurotica.com

Hey folks. Super dumb question here. I'm trying to run a sysgen of RSX-11M v4.2, and when I try to boot the new executive at the end of the sysgen run, it drops into XDT saying "MISSING EXECUTIVE COMMON (S)". I've run through it three times, and I've made absolutely certain that I've said "Y" to the "Executive Common" question (#6 under Executive Options). The most annoying thing about this is that I'm sure I ran into this the last time I did an RSX-11M sysgen, in 1986, and solved it...but for the life of me I can't figure it out this time. Can anyone shed some light on this? Thanks, -Dave -- Dave McGuire Port Charlotte, FL

16 years, 1 month

cctalk Digest, Vol 56, Issue 8

by cclist＠sydex.com

On 7 Apr 2008 at 12:00, cctalk-request at classiccmp.org wrote: > Date: Sun, 6 Apr 2008 14:45:24 -0400 > From: "James Fogg" > It might be easier to go to a metal shop, autobody shop or > Heating/Ventilating/Air Conditioning shop. Any shop like that can make > panels to your exact size in a few minutes (aluminum works best). You can > have a body shop paint them (wait until they are spraying your color > anyways or it gets expensive) or you can use spray paint cans. Any music store dealing with pro road gear will have tons of 19" rack accessories, including blank panels. They also carry the hard-to- find cage nuts, trays, fans, ventilation panels, etc. etc. Cheers, Chuck

16 years, 1 month

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test-drb April 2008