test-drb November 2005

test-drb@ccmp.vtda.org

255 participants
692 discussions

by robert.maxwell＠creationtech.com

Chris, I hope I'm safe in assuming that this is a CRT monitor... otherwise, disregard the following: (1) a vertical line means no horizontal deflection, but (2) a visible line means there is high voltage on the CRT, meaning the horizontal oscillator is buzzing merrily along. Chances are that the horizontal deflection coil on the yoke is open. If you're lucky, a wire may have broken running to the electromagnet-thingy clamped on the neck of the tube - if not, getting a replacement yoke depends on how much support you can get from Apple. Alternatively, find a similar monitor that died of a different problem and mug it for the replacement. Chances are that the display will look distorted, since each yoke has little permanent magnets glued to it that linearize that particular yoke for its CRT. This is the issue even for a brand-new yoke. Bob Maxwell

19 years, 1 month

LF: Docs/info on Teletek 64K S-100 RAM card

by dave04a＠dunfield.com

Acquired this card with no docs. It bears the "TELETEK" logo on the front and back along with "(C)1981 rev2 0601-0112" on the back. I don't have any other model information. Top 1/2 of card has two regulators with heat sinks on the left, and two rows of 16 16k DRAMs each extending to the right side. Bottom 1/2 of the card has mostly TTL, an AMD2964B (40 pin), three TTL delay line devices, one open "jumper socket", and jumpers sprinkled around, with a row of 14 jumpers at the lower right hand corner. (All views described looking at component side with S-100 connector at the bottom. Anyone got one of these cards? Any info on jumper settings etc. would be greatly appreciated. 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

19 years, 1 month

Databooks on EBAY (Belgium)

by RMeenaks＠olf.com

sent it too soon, sorry.. Item #7559862560 > -----Original Message----- > From: Ram Meenakshisundaram > Sent: Monday, November 07, 2005 2:39 PM > To: 'cctech at classiccmp.org' > Subject: Databooks on EBAY (Belgium) > > > Here is a lad who is selling about 300 databooks for 5Euros per book: > >

19 years, 1 month

Databooks on EBAY (Belgium)

by RMeenaks＠olf.com

Here is a lad who is selling about 300 databooks for 5Euros per book:

19 years, 1 month

monitor question (problem diagnosis)

by Watzman＠neo.rr.com

Re: " What does a single vertical line in the middle of a display indicate?" This is a symptom that is normally never seen. It would, in theory, indicate loss of horizontal deflection. The problem is that loss of horizontal deflection in virtually all monitors also causes loss of high voltage, which keeps you from seeing ANYTHING. [The high voltage is obtained from the horizontal output transformer ("flyback" transformer) in virtually every TV set and monitor made.) One possibility: If the horizontal deflection yoke was open, there could be a loss of horizontal deflection while you still had output from the horizontal output transformer. Usually, an open yoke would shut down the horizontal output and high voltage, but it's the only way I can think of that you might get loss of horizontal deflection and still have high voltage.

19 years, 1 month

VCF photos please

by vcf＠siconic.com

Once again, I was too busy to take photos at the VCF of all the exhibitors :( Hopefully someone took nice ones with the exhibitor standing in front of the exhibit, but I'll take whatever you have. Please contact me if you have any. P.S. I'm unsubscribing from the CC list so any communications should come directly to me. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

19 years, 1 month

OT? Need IBM XT keyboard & IBM Mono/CGA/EGA 5151 monitor mine is dead

by rmay635703a＠yahoo.com

I enjoy retrocomputing on my old IBM 5150 but sadly my trusty 5151 is dead as is my 5152. I am using a terribly screen burnt amber "1998" monitor. I have both EGA and MDA IBM adapters so I can use any screen type. If anyone around wisconsin has some extra 9pin monitors Monochrome, color or whatever or knows of a good source I would be thankfull. Also my IBM XT keyboard is pretty much dead as well. I am willing to boot some cash if needed and travel to pickup if your local. For my other projects I need some 1mx4 20pin dipp memory and a Quantum Prodrive 50pin scsi 270mb hard drive (it must be that exact model) I can't seem to find a source of that stuff either. My site displaying my old photography computers from the 80's is here http://www.colortron.tk but someone here says it has non-worksafe popups, my suggestion use Mozilla, though the popups seemed to all be for either vonage when I checked. I am looking for any information on INnovion (the company that made the units) and their older Computer Photo systems from the early 70's. The original Apollo VP1 used a 4 bit processor and printed photos in 8pt text on oversized paper. I used to be able to get old pcs from computer recycling places but they have all closed shop, if anyone here knows of some wisconsin based companies that recycle old pcs and would let someone take a few post a line. My hobby is getting harder to support without parts :( On a plus note although retro computing is getting a little less common at least uncreativelabs.org is back :) Thank You For Any Info Ryan --------------------------------- Yahoo! FareChase - Search multiple travel sites in one click.

19 years, 1 month

Calling Fred van Kempen!

by aek＠bitsavers.org

Several other people have been trying to contact Fred and not having any luck.

19 years, 1 month

Available IBM 5360

by Dawn.Goodloe＠GoldsmithGroup.com

Hello, I did a search for the IIBM 5360 and you came up. I have one sitting in my warehouse and was wondering if it has any value? Thank you, Dawn Dawn Goodloe Shipping and Recycling Coordinator 317-545-4747x33 317-710-0386 cell www.goldsmithgroup.com www.usedprinters.com

19 years, 1 month

help - 11/34 console problem - first measurement results

by ajp166＠bellatlantic.net

> >Subject: RE: help - 11/34 console problem - first measurement results > From: "Gooijen, Henk" <henk.gooijen at oce.com> > Date: Sun, 06 Nov 2005 18:06:41 +0100 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > Cc: "Gooijen, Henk" <henk.gooijen at oce.com> > >------_=_NextPart_001_01C5E2F4.74FC0C20 >Content-Type: text/plain; > charset="iso-8859-1" >Content-Transfer-Encoding: quoted-printable > >Allison wrote: > = > >> I'd consider that the 8008 is getting bad input data from a bad scan line= > >> which it will output or that it's outputing correctly and the data is >> corrupted after output due to bad latch or other hardware. >> >> One likely possibility is not ram as a prblem but a I/O port that has a >> stuck bit. Or the control for that port is stuck. This is most likely >> if the basic fuctions are there (8008 program runs) but some parts of >> the data used to control the 11/34 or display it's status is not correct.= > >> >> FYI the 8008 can be single stepped if you pull the "READY" line each >> cycle and just look at the bus with a simple logic probe or clip. > >Thanks for the good input Allison! >I hooked a logic analyzer to the address lines A0-A7 on one of the program >ROMs, and simply sampled the data without any trigger. With the display in >octal mode, I can see the executed address sequence. The 8008 executes the >main loop and calls SHFT1 *and* returns to the correct PC. That means that >the ROM, RAM (to store the return address) and associated circuits must be = >OK. Ok rom for sure and may be on the ram. The 8008 has an internal push down stack that is 8 deep for call/return. Allison

19 years, 1 month

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test-drb November 2005