test-drb June 2005

test-drb@ccmp.vtda.org

221 participants
681 discussions

IMSAI Score update/Spare BYTEs/Got an Altair too

by rcini＠optonline.net

All: I received a second set of boxes from my IMSAI donator. Today, I received the IMSAI itself, a copy box of BYTEs and a box of S100 cards. This adds to two copy boxes of 8" disks and another box of S100 boards I got a few weeks ago. The IMSAI is immaculate. Not a shread of dirt anywhere...even on the switches. Serial# 3526. I'm going to email Todd Fischer and see where this unit was in the production. I also received more BYTEs, so now I have a lot of spares. I'll have a list together over the weekend of what's spare, but IIRC they will mostly be in the 1977-1980 range. Now, on to the Altair. In a momentary bout of weakness, I put a Hail Mary bid on an 8800b on eBay last night and I won it. It'll be here next week. It's going to be a fun summer! Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

18 years, 11 months

Intel UPP103 Cable

by dwight.elvey＠amd.com

>From: "xyz" <rsnats at bellsouth.net> > >I have a Intel MDS-800 and a UPP-103. I don't have the cable that connects the two units. Both units have DB-25 D-type connectors. Does anyone have a wiring diagram of this cable. > Hi I think I have it someplace. There are about 3 or 4 lines that need to be twisted pairs with a ground lead. The original used a bundle of twisted pairs that had black leads for the one twisted lead. I many cases, the black leads carried data signals and not ground. The cable manufacture only checked that the cable had continuity and not that the right pairs were twisted. When I worked at Intel, I made a checker that would display the number of incorrect twisted pairs by doing a transformer coupling of the wires. It may take me a while to look for the programmer cable drawings. Hopefully, Joe or Dave can find one quicker. Dwight

18 years, 11 months

IBM 5155 analogue display fault

by dwight.elvey＠amd.com

>From: ard at p850ug1.demon.co.uk > ---snip--- >However, I make those modifications as reversable as possible (I would >rather not cut a PCB track, but sometimes there is no other way, for >example). And I don't make them if I don't have to (which is what this >darn thread started off about). > >-tony > > Hi I guess I'm like you. I have a Olivetti M20 and wanted to get the CPM-8000 running on it. The original memory cards had 16K DRAMs that gave the system 224K. To run CPM-8000 I needed to have 64K DRAMs. It required that I unsolder the DRAMs, some capacitors and cut a power line to configure for the larger DRAMs. While I would have prefered to get the larger memory boards from the manufacture, this was not all that practical. I felt that getting working images of the CPM-8000 was more important. A computer that doesn't work is an interesting pile of hazardous waste. One that works is a window into what was. Dwight

18 years, 11 months

Oops! I meant HP 64000 LDS Manual! WAS: HP 9133/9134/9135 service manual

by rigdonj＠cfl.rr.com

This afternoon David send me a PDF copy of the HP 64000 Logic Developement System Configuration manual. I've posted it in the same directory with the HP disk drive manual. <http://www.classiccmp.org/hp/HP%20Docs/> Joe David Bryan just scanned and sent me a copy of "HP's 5 1/4-Inch Winchester Disc Drive Service Documentation" (HP 09134-90032, August 1983) for the old style HP 9133/9134 and 9135 disk drives. Besides the always useful service information, it includes explainations of which drives can be made to look like 4 1.15Mb floppy drives for use on the HP-85 and other small systems that don't normally use the HP hard drives. I've posted it at "http://www.classiccmp.org/hp/HP%20Docs/". Thanks David! Joe

18 years, 11 months

"Pozidriv" [was Re: Tools (was: IBM 5155 analogue display fault]

by pete＠dunnington.u-net.com

On Jun 1 2005, 18:14, der Mouse wrote: > >>> My first repair job was when I used a butter knife on the toaster > >> a good start, and hopefully you have better tools now :-) > > Personally I still find myself places I have to check the cutlery to > > repair something (when I'm at someone elses house). > > There's a reason I always carry my Swiss Army knife. :-) (It's not a > very elaborate one, and not nearly up to comparison with, say, a > Leatherman, but it's pretty versatile given a little imagination.) I always carry one, too. I do actually own a fairly elaborate one, but the one I carry is quite simple. I carefully ground the end of one blade so it fits (approximately, but "well enough") many Philips/Pozidriv screws, and is useful if they're not too tight. The real challenge wa geting it to also fit the rather odd slotted Torx screws used on HP equipment :-) -- Pete Peter Turnbull Network Manager University of York

18 years, 11 months

VR201s free-ish, and more.

by leeedavison＠yahoo.co.uk

Uncovered a couiple of these and no longer need them. As they were stored I guess they work but don't have cables to test them. Ed, they may work with the HP-86s. 8^)= Located in the UK, pickup or delivery costs. Mac powerbook 145. This genuinely fell off the back of a lorry hence the condition, which can only be described as "jigsaw". Good for parts, including the screen which is intact. Lee. . ___________________________________________________________ How much free photo storage do you get? Store your holiday snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com

18 years, 11 months

HP 9133/9134/9135 service manual

by rigdonj＠cfl.rr.com

This afternoon David send me a PDF copy of the HP 64000 Logic Developement System Configuration manual. I've posted it in the same directory with the HP disk drive manual. Joe David Bryan just scanned and sent me a copy of "HP's 5 1/4-Inch Winchester Disc Drive Service Documentation" (HP 09134-90032, August 1983) for the old style HP 9133/9134 and 9135 disk drives. Besides the always useful service information, it includes explainations of which drives can be made to look like 4 1.15Mb floppy drives for use on the HP-85 and other small systems that don't normally use the HP hard drives. I've posted it at "http://www.classiccmp.org/hp/HP%20Docs/". Thanks David! Joe

18 years, 11 months

"Pozidriv" [was Re: Tools (was: IBM 5155 analogue display fault]

by pete＠dunnington.u-net.com

On Jun 1 2005, 13:14, Fred Cisin wrote: > > A Phillips bit will work moderately well on a Pozidriv screw, but the > > about as well as a butter knife works on slotted screws My mother keeps a particular potato peeler because it fits Philips screws. -- Pete Peter Turnbull Network Manager University of York

18 years, 11 months

Intel application notes archive was Re: AN1127 application note

by dave04a＠dunfield.com

>Does anyone know of an archive for Intel Application notes? > >I'd like to find the application notes on building a CRT using the 8275 (one >was for the 8080 the other for the 8085). The closest I could find was one >using 8276 & 8051. Randy, On semi-random picking of my library, I hit one on the first try, this is in Intel 1986 "Microsystem Components Handbook - Peripherals Volume II", there is an application note entitled AP-62 "A Low Cost CRT Terminal using the 8275". It describes the contruction of a small terminal using the 8275 and an 8085. It is about 40 pages long ... if you "really really" need me to, I can scan it for you. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

18 years, 11 months

AN1127 application note

by leeedavison＠yahoo.co.uk

Anyone have a copy of this Motorola app note? It seems my 'fax back' paper copy has faded beyond readability over the years and I can't locate an electronic copy. The full title is .. "High Speed DRAM Design for the 40MHz MC68EC030" Cheers, Lee. . ___________________________________________________________ Yahoo! Messenger - NEW crystal clear PC to PC calling worldwide with voicemail http://uk.messenger.yahoo.com

18 years, 11 months

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test-drb June 2005