test-drb January 2016

test-drb@ccmp.vtda.org

172 participants
198 discussions

by sellam＠vintagetech.com

I have for sale one MITS S-100 modem board set (88 SIOB + MODEM BD). It's in excellent condition physically, unknown functional condition but probably works fine (it's been stored in an anti-static bag). Photos here: http://vintagetech.com/sales/S-100/MITS%20Modem/ Asking $250 or best offer. Thanks! -- Sellam Abraham VintageTech ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintagetech.com Whatsoever a man soweth, that shall he also reap. The truth is always simple. * * * NOTICE * * * Due to the insecure nature of the medium over which this message has been transmitted, no statement made in this writing may be considered reliable for any purpose either express or implied. The contents of this message are appropriate for entertainment and/or informational purposes only. The right of the people to be secure in their papers against unreasonable searches and seizures shall not be violated.

8 years, 11 months

s100

by nierveze＠radio-astronomie.com

hello everyone , first am 1 on the correct channel?? I have several S100 boards , found 25 years ago, kept in my cellar and forgotten....fortunately they are still in good conditions , all circuits are standard ttl (only a few proms) ,and all circuits are on sockets so all is easy to repair. I cleaned and repaired the power supply (only one capacitor exploded ) , I have the correct voltages +- 19v ,+9V on the backplane , now the power supply works . I have very few documentations only a few booklets with configuration data on some of the boards , no schematic. The maker was a french company named ADD-X ,located near Toulouse south west of France . Machines ran cpm/mpm . I have boards of several configurations : *cpu boards with Z80,64k of dynamic rams and 2708 . There are configuration switches around the eprom socket to use 2708 or 2716 . I wonder how it is possible to address more than 64K (rams+eprom)with a Z80 . I need documentation about it . On Ebay I found a Z64 board that is identical , I cannot contact the seller , I tried to get informations ... he does not accept emails. Does anyone know that Z64 ? *boards with 4 rs232+1 ppi *boards with 2 rs232+1ppi+1 fdc configurable for 8 inches or 5 inches floppys. *hdc controllers with one hard disk I also have disquettes,and backplanes . I need informations on the S100/cpm systems , how are boards addressed , it is something like qbus/unibus : fixed address for each category of board,is the console at a fixed address???etc . Since that epoch I have all the classic books from R.Zaks about microprocessors and cpm , there are very few informations on the S100 bus. I built a system with a cpu and a board with RS232 and fdc,I connected the terminal to the port labeled 'con0'(console 0??) ,nothing happened on the terminal. It may be lots of thing from a dead cpu or eprom to rs232 driver . I did not test more for today. I want to build a small system with a monitor in rom to examine/modify ram , registers just to learn Z80 . What monitor can be used ? I have what is necessary to compile and burn eproms . Thanks for your help . I have lots of questions.I can send photos to identify boards . Best regards Alain Nierveze

8 years, 11 months

Floppy recovery

by jws＠jwsss.com

I wonder how it could take them three months to figure something out. Maybe Chuck can comment. But over a year after they spent the 3 months. Hmmm. It will be interesting to hear what was recovered, though from what has been written and passed down about Roddenberry, I'm not expecting much. On a tangent, from a lecture 35 years ago by Harlan Ellison, I hope all of his papers are preserved and transcribed. He had about 15 4 drawer cabinets of work notes at that time, probably double or triple that now. I think at the time he worked manually as well. https://www.yahoo.com/tech/floppy-disks-star-trek-creator-182855583.html Thanks Jim

8 years, 11 months

A long note about the panel pictures.

by rodsmallwood52＠btinternet.com

Hi Guys! The big picture shows a fame with three masters on it. Oh yes you might say they put the panel in and print in three passes. Er no. having three different colour inks sloshing around in a frame at the same time might cause a few problems. From bottom up we have Terracotta, then amber and finally white. First they line up the blank panel with the Terracotta master and screen all the blanks with that colour. They go into a special rack to dry. Now they have to get rid if every trace of Terracotta ink without messing the master up. They like to leave 12 - 24 hours between passes. (Overnight if they can) . They repeat the process for Amber . Finally we come to the White layer. Try putting a 1mm white line between two different colours , always keeping the two colours on the correct sides of the line with no gaps. OK thats what they did with the first batch. Generally they were very well received and looked good. I asked for feed back and one list member said the real ones appear to be matt black on the front. I got an old panel shipped over because I thought it was just age and dirt. Well it wasn't matt black nor was it dirty. They had put a translucent layer on the front that helped to deffuse the light from the lamps and had this strange optical effect of making the front look matt black. Going back to my DEC days I think the the general view was they were matt black on both front and back to stop unwanted reflections due to the point light sources from filament lamps. So I asked if we could get some suitable ink. and try it out. Well the answer came back that whilst it was fine for deffusing the light over the holes on the back , they were not happy with the results on the front. A thin layer of real matt black on the front was much nearer the sample they said. So I added a thin matt black layer on the front for the current batch. You can't tell the difference. I think I know what may have happend. If you put a layer of matt black on the front you need an extra screen with holes that line up with those on the back. A translucent layer just goes right across. I believe it was intended to be black on both back and front but somebody did a bit of cost engineering. Well two can play that game and I have come up with an answer. From my normal supplier I have been able to source our standard 3mm perspex but with one side having a silk finish. It minics the effect of the old plastic with the diffusing ink perfectly! The front looks matt black. It also makes the ink adhere better Saves putting a front matt black layer on future batches and you cant tell. Rod

8 years, 11 months

Front panels Video clip

by rodsmallwood52＠btinternet.com

Hi Guys I have a short video of part run boards awaiting their turn for the next layer. (probably a bit boring). One of the girls is in the picture (not boring) If you want I can attach it to an email. Its a .mov file. Email me off list for a copy. Rod

8 years, 11 months

Correction - Front Panel Update

by rodsmallwood52＠btinternet.com

Ooops! For boards read panels Rod

8 years, 11 months

Open VMS System Mgt Guide Scripts Avail.

by billdegnan＠gmail.com

I've uploaded the contents of the disk that accompanis the book "OpenVMS System Management Guide" by Lawrence Baldwin here: http://www.vintagecomputer.net/digital/OpenVMS/ Maybe your copy is missing the disk. The disk contains scripts for version 5-->6 transition. Does anyone know of any MULTINET script libraries? -- Bill

8 years, 11 months

Free HP 3000 Equipment for removal (Denver Craigslist)

by ball.of.john＠gmail.com

Marc, this is a good reason for anyone to convert their old rec room into a machine room. Just make sure to paint the walls brown and fit wall-to-wall orange carpeting. ;) I was seriously tempted on this myself but even picking up ONE 7925 from Idaho was an astounding task. A whole setup in Denver? That's nuts. -John >Cool, glad someone's snagging it. I wish, but I don't know where I'd put >it. > >On Tue, Jan 5, 2016 at 2:34 PM, CuriousMarc <curiousmarc3 at gmail.com> wrote: > >> I'm on it... >> Marc >> >> -----Original Message----- >> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Glen >> Slick >> Sent: Monday, January 04, 2016 8:38 PM >> To: General Discussion: On-Topic and Off-Topic Posts >> Subject: Free HP 3000 Equipment for removal (Denver Craigslist) >> >> Someone go get this. >> >> posted: 2016-01-04 12:20pm >> >> http://denver.craigslist.org/sys/5387506164.html >> >> I have the following HP 3000 computer equipment in my basement yours FREE >> for removal >> >>--TRIMMED--

8 years, 11 months

Conservation issue - shrink-wrapped manual

by jnc＠mercury.lcs.mit.edu

So I have a question for people who are involved in museums, and similar roles - how intense should I be about keeping things just as they were? I have a DEC manual (actually a Products Guide) still in its original shrink-wrap, and I'm interested in hearing opinions/rationales on whether or not I should keep it like that, as opposed to (carefully) opening it to be gain access to the content. Is there any value at all, historically, to keeping the original packaging intact, or should I just go ahead and open it? Thanks! Noel

8 years, 11 months

PDP-8 core memory for sale (_not_ from me)

by jnc＠mercury.lcs.mit.edu

So there's this item: http://www.ebay.com/itm/262217954449 I'm not an -8 person, so maybe there's some reason nobody's biting, but if not, I thought I'd point it out. Noel

8 years, 11 months

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test-drb January 2016