test-drb May 2006

test-drb@ccmp.vtda.org

195 participants
346 discussions

by sb＠thebackend.de

Hello everyone, I recently got a DEC PRO 350. It suffering from a lack of RAM since two of its three memory boards are defective (one of the small ones that plug into the mainboard and one that goes into the extension cage and seems to carry its own DRAM controller in logic). I first wanted to take a look at the small one but I can't even find any info on the ICs used: JAPAN 8304U 21-18470-01 There is a small logo that seems to indicate Hitachi as manufacturer [1]. Google refused to find anything on these chips. Does anyone know a few things about them? Pinout and timing would be a fair start... Thanks Sebastian [1] http://www.linksiden.dk/sub/ic_logo.htm

18 years, 2 months

inverse assembler for hp 163x logic analyzer

by frustum＠pacbell.net

I tried searching the agilent web site, hoping they might have been kind to users of their obsolete equipment. Indeed, they were nice enough to post the manual for the 1631D, which is the model I have. They didn't provide any disk images for the Z80 inverse assembler, aka disassembler, software. Does anybody on the list know of a source of this software, or perhaps has it and is willing to make a dup? I have a Wang 2275 storage unit (hard disk + floppy) that fails to boot up, and it uses a Z80 as the controller. Fortunately, I have a second, working, 2275. By switching the disks between the units I have been able to image both hard drives, but it would be nice to get the 2nd unit going. Thanks.

18 years, 2 months

ST-412 interface specification

by cctalk＠catcorner.org

Where can I find a good technical and electrical specification for these drives? I just want to see what it'll take to emulate them using modern hardware. My supply is dwindling. Thanks, Kelly

18 years, 2 months

Home Brew Hardware / Software

by Billy.Pettit＠wdc.com

http://www.zetetics.com/bj/papers/ An interesting site with a lot of small projects. Check out especially: A Pathetic Instruction Set Computer http://www.zetetics.com/bj/papers/piscedu2.htm

18 years, 2 months

HP 264x terminals

by jwest＠opensourceassociates.com

Hummm WHY did I offer to organize a group purchase? I'm asking myself that. Apparently the seller saw and/or heard about the words of caution that some people here posted, one was a lack of terminals being shipped, another was 'lets hold off on a bulk purchase till at least some terminals are shipped'. I'd like to throw in a few tidbits: 1) The seller contacted me and appears to feel I have caused a bit of a problem because my list had negative comments about him. I explained to him that anyone on the list is free to post their experiences, advice, etc. without me censoring. Talk to the people who expressed their concerns, not me. Nuff said. 2) I have been assured by the seller that the terminals are in fact on the way to the non-group purchase people. My views are below: My impression (from a few email exchanges only) is that this is likely an honest guy that basically fell into a boatload of units, and after the first few has found it to be a HUGE effort to carefully clean one up, test it, photograph it, pack it (well!) for shipping, etc. I suspect he's found this is far more effort (and probably mostly time) than he'd care to spend on it. I'm not sure he anticipated what packing a heavy unit like the 264x can be like. Just tossing it into a cardboard box won't do and he's aware of that. And he's got 50 of 'em. Thats a lot of time. I understand very well the thoughts and concerns expressed by the folks here, and I will defend your right to share them. However, what I was hoping to do for a bulk purchase (if it can be pulled off still) is to have someone in the vicinity pick them up. There's no cleaning/testing/shipping issues for him, and hopefully that would be reflected in the price. I don't have experience with this seller or inside knowledge that causes me to say this - but going from my gut only, I'd say give the guy a little slack for now. My scam meter isn't going off just yet. Form your own opinion. Jay West

18 years, 2 months

Free Amiga books, magazines, Tandy 1000RLX for shipping

by wpileggi＠juno.com

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18 years, 2 months

-5V rail in a PC...

by lee＠geekdot.com

> Far as I know, things that needed -ve rails (like soundcards, serial > ports etc.) all used -12V... Can't say I've ever seen it used. I've just looked at a 200W PSU and the -5V rail is speced at 0.1A so you couldn't run much from it anyway. Also I've never bothered adding the -5V line to my VIC 20 ISA backplane, I've yet to find a card that uses it. The one card that does have +/-5V analogue supplies uses 78L05 and 79L05 regulators from the +/-12V rails. Lee.

18 years, 2 months

Unknown IC

by cc＠corti-net.de

Hello, I have several unknown ICs from AMI, numbered 1315-P-2, a picture can be found on ftp://ftp.informatik.uni-stuttgart.de/pub/cm/ic/ami1315.jpg I think they came from ITT 3287 terminals (or ITT Courier, or Courier Terminal Systems). I have several boards from those terminals (all >from around 1976-77), they used the i8008 as processor (see picture). The unknown AMI IC is found on a board labelled CURSOR/BUFFER. I have boards with that IC as only LSI chip, or along with a Signetics 2650. So my question is, what is that AMI chip? Has anyone a datasheet? Oh, and I have some NatSemi 1409, 40 pins, as found on the TIMING board (which also contains 16 i1404 1kBit MOS shift registers as display memory), what is that? Christian

18 years, 2 months

pushbutton under the power cord cover on a VAX4000

by compoobah＠valleyimplants.com

It is definitely a pushbutton switch- I haven't traced mine out, but I figured it was a "lawyer button" to do something like discharge the caps . . .

18 years, 2 months

marginal OT: Intel cashes in ancient chips

by spectre＠floodgap.com

http://www.reghardware.co.uk/2006/05/18/intel_cans_386_486_960_cpus/ Intel is ceasing production of the i960, i486 and i386 (!). The i960 is particularly interesting -- I thought that one was long gone. -- --------------------------------- personal: http://www.armory.com/~spectre/ --- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Why was I born with such contemporaries? -- Oscar Wilde --------------------

18 years, 2 months

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test-drb May 2006