test-drb April 2018

test-drb@ccmp.vtda.org

128 participants
123 discussions

Need help identifying Timex Sinclair ZX81 "Programmer Console" on eBay

by dan＠quakka.com

Hi everyone, I collect Timex Sinclair / ZX81 gear, but have never seen one of these before: https://www.ebay.com/itm/RARE-Vtg-TIMEX-SINCLAIR-ZX81-Computer-PROGRAMMER-C… <https://www.ebay.com/itm/RARE-Vtg-TIMEX-SINCLAIR-ZX81-Computer-PROGRAMMER-C…> Do any of you recognize it? Can you explain its purpose, please? Cheers, -Dan

6 years, 3 months

alpha 3000-400S parts for sale

by useddec＠gmail.com

If interested, please contact me off list. Thanks, Paul

6 years, 3 months

P112

by cruff＠ruffspot.net

I have a operational P112 with 3.5" floppies, GIDE/CF and CD-ROM. Do you know which ROM you have installed?

6 years, 3 months

SGI Indy power supply: identify this diode?

by pete＠dunnington.plus.com

After a recent power cut and a series of glitches as the power was restored, one of my Indys suffered a PSU failure. It's a Sony APS-81 171W unit, SGI P/N 060-0008-001. I've found half a dozen damaged parts, and I've identified a 150R 1W metal film resistor (R135), two trannies (Q105, a 2SC4304 and Q106, a 2SC2785) and a couple of small diodes. One of them (D116) appears to be a 6.2b2 (6.2V 1/2W) zener. The other one I'm not sure about. On the PCB it's labelled D113, and it's adjacent to the 2SC2785. It's very small, with a green band at the cathode end, and the legend "4B" in green - photos at https://www.flickr.com/photos/pnt103/albums/72157667056183978 Oddly, another Sony PSU I looked at had a diode there that looked identical except it's marked "4A". I have an idea what it might be but if anyone actually knows what family or type/value this is, I'd be grateful for any insight. -- Pete Pete Turnbull

6 years, 3 months

WeirdStuff going out of business

by aek＠bitsavers.org

Last Day is this Sunday http://www.vcfed.org/forum/showthread.php?63045-WeirdStuff-is-going-out-of-… since I can't attach a picture here

6 years, 3 months

8080/8085 Programming books available UK/EU

by mark＠wickensonline.co.uk

A few seminal 8085 programming books available please see album: https://photos.app.goo.gl/Rv7vy9eDrMfGK9gz2 Looking for ?25 including postage to the UK or ?20 plus postage elsewhere. Regards Mark

6 years, 3 months

PDP Programming books for sale UK

by shadoooo＠gmail.com

Hello Mark, I sent you an email some hours ago about the books, not sure if it got lost in spam... I would buy them all. Thanks Andrea

6 years, 3 months

RL01/RL02 emulator needed -- (was Many thanks to Glen's Vintage Computer Info)

by Flash688＠flying-disk.com

jnc at mercury.lcs.mit.edu (Noel Chiappa) wrote: > Err, which RLV11/RLV12 emulators are you seeing? I know of several RL02 > emulators - Reinhard Heuberger's, and another I can't immediately find my > saved info on - (and one crazy project that turned a real RL02 into a USB > device :-), but you still need an RLV11/12 controller. The only ones I can find now are the ones you mention. Yes, I too can't find my notes on the second one, whatever it is/was. I was *sure* that someone had made a Qbus emulator that used SD cards, but I simply can't find any mention of it now. Right now, it looks like Reinhard Heuberger's board is the best bet. I haven't checked with him yet to see if boards or kits are still available. If I could find a working TDL-12 I would jump on it in an instant. All the older ones (Dilog, etc.) appear to use ST-506 type drives, which introduces its own set of problems. Alan Frisbie

6 years, 3 months

PDP Programming books for sale UK

by mark＠wickensonline.co.uk

Please see album: https://photos.app.goo.gl/ZztlMFCSoZcy2ZJz1 Looking for ?20 plus postage likely to be less than ?5 UK. Regards Mark

6 years, 3 months

RL01/RL02 emulator needed -- (was Many thanks to Glen's Vintage Computer Info)

by jnc＠mercury.lcs.mit.edu

> From: Alan Frisbie > I need a controller that emulates the DEC RLV11/RLV12 and RL01/RL02 > drives. From my Google searching, I see a couple that use SD or similar > solid state devices. Err, which RLV11/RLV12 emulators are you seeing? I know of several RL02 emulators - Reinhard Heuberger's, and another I can't immediately find my saved info on - (and one crazy project that turned a real RL02 into a USB device :-), but you still need an RLV11/12 controller. Noel

6 years, 3 months

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test-drb April 2018