test-drb August 2012

test-drb@ccmp.vtda.org

215 participants
247 discussions

by nick.allen＠comcast.net

Hey everyone, I ma repairing a Sun 100U computer, and am having some issues I would love some help with. I am using a bwtwo video card with the Sun 100U CRT (its a 17" HD B&W phillips CRT). I am getting an image showing a successful boot, but I am getting a split double image (like split screen but the same image on both sides). Any ideas what is causing this, a frequency issue? Any jumpers/settings on the video card which may inadvertently cause this? Could it be a CRT issue?

12 years, 4 months

Vintage SCSI drives for sale

by lproven＠gmail.com

Starting the big clearout... Thought these might be of interest hereabouts: IBM WDS-3160S 160MB SCSI hard drive http://www.ebay.co.uk/itm/271033047930 IBM type 661 330MB SCSI hard disk http://www.ebay.co.uk/itm/271033050365 Quantum Prodrive 210s vintage 210MB SCSI hard drive http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=271033044140 Also a vintage Mac but that's probably less interesting. ;-) -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Tel: +44 20-8685-0498 ? Cell: +44 7939-087884

12 years, 4 months

anyone else w/an NEC PC-8001A?

by rampaginggreenhulk＠yahoo.com

I just need some moral support, as my unit currently doesn't work. Probably an easy fix. I do have the whole deck out though, floppy cabinet, expansion cabinet. Monitor.

12 years, 4 months

Current license holder of DEC PDP-11 operating systems

by gerhard.kreuzer＠liftoff.at

Check out this link .. http://www.linkedin.com/pub/david-carroll/13/791/a07 Best regards Gerhard

12 years, 4 months

HP 98xx series cassette EOT-sensor fix : war story

by elson＠pico-systems.com

> Date: Wed, 8 Aug 2012 23:22:20 +0200 > From: "Rik Bos" <hp-fix at xs4all.nl> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: HP 98xx series cassette EOT-sensor fix : war story > Message-ID: <001001cd75ab$e8416670$b8c43350$(a)xs4all.nl> > Content-Type: text/plain; charset="us-ascii" > > Lately I acquired some HP 9865 cassette units and a HP 9821A three cassette > drives suffered from 'slow running' > > I found out the LDR's used in the EOT sensor are causing this behavior, the > used LDR's are from the NSL314 type which is practically unobtainable. > > The NSL314 is a IR-sensitive CDSe type LDR, replacing it with a standard low > resistance LDR doesn't do the trick, the LDR needs to have a resistance > lower then ~5k at low light. > > The most of the cassette drives also suffer from bad sensor bulb, replacing > the bulb by a white LED doesn't give enough light to do the trick. > > The combination white LED and new LDR isn't working because the LDR > resistance isn't getting low enough. > > The sensor amplifier circuit needs to be modified to work correct, I did > this by creating Wheatstone's bridge by adding a grounding resistor to the > LDR input. > > Adding a series resistor of 10k to LDR input and changing the feedback > resistor from 18k2 to 100k made the amplifier work correct with the > combination white LED and 'normal' CDS type LDR. > Why wouldn't you use an IR LED? Jon

12 years, 4 months

SGI IRIS 1400 mkboot and Ideal III tape images

by lawrence＠ljw.me.uk

[Forwarded by lawrence at ljw.me.uk with links obfuscated] From: Tothwolf <tothwolf at concentric.net> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Subject: SGI IRIS 1400 mkboot and Ideal III tape images Date: Wed, 8 Aug 2012 17:39:24 -0500 (CDT) [2nd attempt to send this to the list.] I just found these tape images again while sorting out files and thought I'd post links here so these can be mirrored. I dumped both tapes about 10 years ago when I got them with the SGI IRIS 1400. These will probably only be of use to someone with one of these machines, but no one else I spoke with back when I got the machine had this software. I'm not sure if the mkboot tape is usable or not but I don't remember having any trouble reading either of the tapes. The tape.0 and tape.2 files both read as valid cpio archives, but tape.1 doesn't. These three tape.x files were separate partitions on the QIC tape. http://strudel (dot) ignorelist (dot) com/~tothwolf/classiccmp/SGI-IRIS-1400/MKBOOT-IRIS-1400.tar.gz MKBOOT TAPE INCLUDING /USR PARTITION FOR THE IRIS 1400 DATE 4/1/88 TAPE NO. 063/SG/005 http://strudel (dot) ignorelist (dot) com/~tothwolf/classiccmp/SGI-IRIS-1400/IDEAL-III.tar.gz IMAGE VISUAL SYSTEM SINGER Link-Miles 27 NOV 1987 IDEAL III CUSTOMER RELEASE TAPE FOR IRIS 1400 64 COLOR INCLUDING:- RUN FILES, MENUS, HELD FILES, KERMIT UTILITY FILES AND COMSEG D/BASES TAPE NO. 063/SG/004

12 years, 4 months

MEK6800

by wackyvorlon＠me.com

A number of years ago now, I ran across a bit of a find at a computer recycler's. It's an old Motorola evaluation kit for the 6800. I thought I had the CPU board, an interface board and a couple memory boards - it turns out I had two pairs of the processor board and interface board. I've fired up at least the one pair, and they work perfectly. I loaded some code into memory using the hex keypad and it ran fine. Anybody else run across these?

12 years, 4 months

Looking for a vintage S100 power supply

by billdeg＠degnanco.com

I just posted the MITS Altair 8800 Power supply specs with a link to the schematic on my web site, if you went the sensible route and bought something new with the same characteristics the original. http://vintagecomputer.net/browse_thread.cfm?id=486 Bill

12 years, 4 months

slowest supercomputer still in operation

by dgriffi＠cs.csubak.edu

After looking at nice computers at Ames and the Computer History Museum, a though occurred to me: What is the slowest/oldest supercomputer still in operation? -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

12 years, 4 months

potter pens.

by bfranchuk＠jetnet.ab.ca

I just noticed this ad about space pens. Will the same cartridges fit on the older plotter? http://www.spacepen.com/

12 years, 4 months

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test-drb August 2012