test-drb April 2010

test-drb@ccmp.vtda.org

172 participants
242 discussions

seeking DEC digital mps - microprocessor series monitor/control panel

by nigel.d.williams＠gmail.com

http://www.dvq.com/oldcomp/photos2/1k/dec_micro_panel.JPG I find this device quite fascinating (Intel 8008 plugged into a PDP-8 host), if anyone has one surplus I would be interested in negotiating. thanks. www.retroComputingTasmania.com

13 years, 8 months

GNT 3601 tape punch docs?

by chrise＠pobox.com

Probably a stretch but wondering if anyone has any info (manual, pinouts, service documentation) for a GNT model 3601 8-bit (1") paper tape punch. It was probably better known in the CNC / automated machining world than in computing but my hope is to resurrect it as a backup punch for copying tapes I use with my ASR-33 and thereby save wear on the -33's punch. The unit has serial and parallel interfaces on DB25 connectors but I do not have any pinout information for those. The serial one I can probably figure out. Unfortunately, the unit is a little more sick than "works OK" seemed to imply from the eBay seller. It has what I believe to be a power supply problem because as soon as you try to punch all eight holes with the front panel test button, the power LED dims and the punch jams, apparently from lack of umph to complete the mission. It could also be jamming to start with and that causes the power drop I suppose. In any case, looking for any docs before I open it up and start digging around. I have written to GNT without a reply so far. Chris -- Chris Elmquist mailto:chrise at pobox.com

13 years, 10 months

Apple Lisa 1 for sale

by sellam＠vintagetech.com

I have an Apple Lisa 1 for sale. Yes, it has the Twiggy drives. It includes the Twiggy systems OS disks (2), original Lisa 1 manual, keyboard, original Lisa (rectangular button) mouse. It works. Excellent condition. Normally I would not so brazenly hawk something but I need to raise funds for an imminent move of the VCF archives. I'm entertaining any and all offers. At a minimum, there should be three zeroes before the decimal point. Please contact me directly if you're interested. Photos and more detail will be forwarded upon request. Will ship galaxy-wide. Thanks! -- 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 ]

13 years, 10 months

MDS Series 21

by cc＠informatik.uni-stuttgart.de

Hi, what exactly is a Mohawk Data Sciences (MDS) Series 21? There's almost nothing on the net about that system apart from one small article in the July 1978 issue of Computer. Is it worth saving? Christian

14 years

the beginning of the end for floppies

by jlobocki＠gmail.com

Well, as of yesterday, Sony is planning to stop production of floppy disks. Apparently, other companies will still make them, but I'm sure its only a matter of time.... http://www.crn.com/storage/224600457;jsessionid=GTMHM30DE1HQBQE1GHPCKH4ATMY…

14 years

Reading NorthStar Horizon hard sector disks on PC

by marvin＠west.net

> From: "Chuck Guzis" <cclist at sydex.com> > Not all Northstar diskettes are HS. One of the models (Advantage?) > isn't--and it's that format that the Microsolutions MatchPoint will > read, not the others. It's been too long since I've seen the darned > things... I think the machine you are thinking of might be the N* Dimension. The Advantage still uses 10-sector floppies. I've never seen the Dimension but vintagemicros on Ebay was selling one a while back and had a picture of it. Apparently it was MS-DOS compatible.

14 years

Suggestions for repairing HP tape drive capstans?

by ard＠p850ug1.demon.co.uk

I have a number of HP QIC tape drive units -- I think it's 2 off 9142, 3 off 9144 (1 3-board, the other 2 are single-board) and a 9145 [1] all with hte same problem. The rubber capstan has turend to goo. [1] There's a darn 68000 processor in that drive, unlike the 68B09s in the other units. Eeek! The capstan is a rubber 'tyre' on a metal hub, the latter being glued to the motor spidnle. The diameter of the hub is around 12mm (but I wil measure that accurately) and the overall diameter of the tyre is perhaps 18mm (it's going to be hard to measure, sure the fact I don't have a solid one :-() Anyway, does anyone have any suggestions as to suitable material that I can obtain in the UK to repair this? Assume as ever I have a reasonable workshop and am not affraid to pull the drives to bits :-) -tony

14 years, 1 month

Looking for CMD CQD-200/TM or CQD-200/M EPROM images

by glen.slick＠gmail.com

Does anyone have a CMD CQD-200/TM or CQD-200/M and an EPROM programmer or other means of reading the EPROM images that could send me a copy? I think I have mostly figured out the CSR decode PAL for a CQD-200/T and programmed a new one and now it responds to both the disk and tape CSRs, but only the tape CSR looks like it has normal values. Maybe I also need to replace the EPROMs with CQD-200/TM or CQD-200/M EPROM images to get it to respond normally to the disk CSR. I have had encouraging results so far doing the same to convert a CQD-220/M into a CQD-220/TM and got it working with both a disk and a tape at the same time. -Glen

14 years, 2 months

PDP8/A for sale

by 1metalguru＠gmail.com

To those interested in my PDP8/A system: It contains: 1 - M8315 Hex Omnibus CPU 1 - H219B 16K Core Memory Module 1 - M8316 Option Board 1 with 1 - KC8AA Programming Panel 1 - M8317 Option Board 2 bootstrap 1 - M8342 Parallel Control 1 - M8357 RX8E Omnibus Interface 1 - M8326 Inter-processor Buffer 1 - PDP8/A Field Maintenance Print Set. 1 - PDP8 Internal Bus Options Maintenance Manual Vol 2 I am accepting offers to purchase this unit. I live in Calgary, Alberta, Canada. I have checked with UPS and Xpress Post and shipping to the continental United States would start at approximately $100, assuming a package 24x24x12 weighing 60 lbs. I also have a PDP8/I WO25 Core Memory Module mod 30-05256-2 made by Data-Ram Corp.: Darrell

14 years, 2 months

Anyone pick up the Manx ball yet?

by steve＠cosam.org

Towards the end of last year, the Manx documentation catalogue was pronounced dead by its maintainer and taken offline. Understandably, many pleas for a dump of the database followed, and this was subsequently made available. Thankfully the site was soon up again, although no longer maintained and apparently missing a few PDFs. Since then it seems to have gone quiet. Did anyone end up doing anything with the dump, or were all the requests for this simply to ensure that the raw data was preserved? Cheers, -- Steve Maddison http://www.cosam.org/

14 years, 2 months

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test-drb April 2010