test-drb November 2005

test-drb@ccmp.vtda.org

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SGI....

by dholland＠woh.rr.com

Damn... :-( http://www.sgi.com/company_info/newsroom/press_releases/2005/november/nyse.… David

19 years, 1 month

help - 11/34 console problem -- CNTRL key behaviour

by ajp166＠bellatlantic.net

> >Subject: RE: help - 11/34 console problem -- CNTRL key behaviour > From: "Gooijen, Henk" <henk.gooijen at oce.com> > Date: Thu, 10 Nov 2005 14:44:52 +0100 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >Allison wrote: > >> Well it does not have to be a clock. It happend the product >> I was working on was a time code display for video tape where >> the display could be time or number of frames. >> >> Besides the display system for PDP-11 is likely OCTAL. ;) > >True, but the latch that outputs the 3 bits for the 7447 has >a fourth output which could be used! Take that 4th output to >the 7447 'D' input (which is now connected to GND) and you >can display an "8" or a "9". But I am drifting off-topic -- >the console must work for starters :-) > >- Henk, PA8PDP. The whole point of the clock thing is simple code to make a repeated operation that traces esily with scope or logic analyser. Allison

19 years, 1 month

help - 11/34 console problem -- CNTRL key behaviour

by henk.gooijen＠oce.com

Allison wrote: > Well it does not have to be a clock. It happend the product > I was working on was a time code display for video tape where > the display could be time or number of frames. > > Besides the display system for PDP-11 is likely OCTAL. ;) True, but the latch that outputs the 3 bits for the 7447 has a fourth output which could be used! Take that 4th output to the 7447 'D' input (which is now connected to GND) and you can display an "8" or a "9". But I am drifting off-topic -- the console must work for starters :-) - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

19 years, 1 month

help - 11/34 console problem -- CNTRL key behaviour

by ajp166＠bellatlantic.net

> >Subject: RE: help - 11/34 console problem -- CNTRL key behaviour > From: "Gooijen, Henk" <henk.gooijen at oce.com> > Date: Thu, 10 Nov 2005 13:25:03 +0100 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >Allison wrote: > >I checked the contents of the ROMs (from the listing). They are >quite filled, there is no room to show a clock on the display. >Would be fun, because once the 11/34 runs, the display is not >very exciting any more ... >Pity that the ROMs are soldered on the board. It would be quite >a hack (but certainly possible!) to enable an other set of ROMs >to run e.g. the clock software. But then there is also the >difficulty to get the proper (blank) ROMs. >But it is a fun idea to keep in mind ... Well it does not have to be a clock. It happend the product I was working on was a time code display for video tape where the display could be time or number of frames. Besides the display system for PDP-11 is likely OCTAL. ;) >The RAM timing traces will be up on Monday! Actually a common 2716 or later device is fine for that. Disable the on board and use an adaptor. A fast 8008 was 10us instrcution time so rom speed will not be an issue. If I were doing it now I'd make an adaptor and use a 2816 (EEPROM) with a simple bit of logic to load stuff. Not a lot of space is needed Small loops to write to ram and display it are maybe 20-50 bytes. Allison

19 years, 1 month

VCF questions

by James＠jdfogg.com

Sorry for my ignorance - Who runs the VCF events? Do they have guest speakers? I ask because I attended a presentation by Doug McIlroy, an early computer pioneer with Bell Labs, and Thompson/Ritchie's manager. He's made significant contributions to both Unix and Multics, among other things and he has some great stories to tell about the early days and the development of Unix. His presentation was focused on personal experiences and the people he's known, but I believe he can also get very technical (he is currently an adjunct professor at Dartmouth). After the presentation I spoke for a time with Doug. He was amazed that there exists a community interested in the preservation and restoration of old computers and their software. I explained a few things about the community and some of their projects and he was interested in the idea of the VCF. He said he'd consider an opportunity to speak at the VCF or similar venues in the North East and Mid Atlantic regions. Would there be an interest in having Doug present, does the VCF have space in their program for speakers? Some info on Doug - http://www.cs.dartmouth.edu/~doug/biography http://en.wikipedia.org/wiki/Doug_McIlroy http://www.cs.dartmouth.edu/~doug/ -James

19 years, 1 month

help - 11/34 console problem -- CNTRL key behaviour

by henk.gooijen＠oce.com

Allison wrote: > Never seen a dead 8008. I thought I'd killed one (at $180 then!) > by installing it backward and then tossed it on the floor in the > engineering lab. some days later after pulling from the bottom > of my shoe I tried it again and it was still alive. Amazing, but I will not try to repeat it to test your story :-) > The ram however is definately suspect. But I've seen IO > messups with 8008 and with scanned displays and keyboards are > harder to look at. This weekend I will check the RAMs! > It would be goof if you could run a different program and see > it's results. > We used a set of ROMs all different to test. They were short > programs that would either loop or do something and halt. For > example we had one that would write (this was a time display) > 00:00:00 then increment all the displays without doing > anything else. Another would write a 8 tot he last display > and halt. the most useful ones were those that would > repeatedly loop input or output to a port. Very handy as > back (1973) then logic analysers were not to be had and a > 15mhz dual trace scope was the usual tool. I checked the contents of the ROMs (from the listing). They are quite filled, there is no room to show a clock on the display. Would be fun, because once the 11/34 runs, the display is not very exciting any more ... Pity that the ROMs are soldered on the board. It would be quite a hack (but certainly possible!) to enable an other set of ROMs to run e.g. the clock software. But then there is also the difficulty to get the proper (blank) ROMs. But it is a fun idea to keep in mind ... The RAM timing traces will be up on Monday! thanks, - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

19 years, 1 month

DAQsuite for Quatech ISA cards needed

by r.mueller＠fz-juelich.de

I have arranged to buy a Quatech DAQ1602 card for the ISA bus. However, the company no longer supports the card and as too often happens, the resellers do not bother to deliver the software or handbooks. Is there anyone out there who has DaqSuite, the normal CD supplied with the card? I would be glad to cover your costs if you can help me to get this card running. Incidentally, if you have ANY card which was delivered with DaqSuite, the CD probably includes what I need. Quatech seems to have included their whole product line on the same CD and the CD was supplied on request to owners of the company's products. Unfortunately for me, the product line has been sold to another company and that company does not supply the card I have. Indeed, one other company continues to sell some products from the Quatech product lineup, but not the 1602. I would greatly appreciate help in obtaining a copy of the CD (even over the Internet, if that is easier!) Sincerely, Bob Mueller

19 years, 1 month

Discharging a VT100 CRT

by ajp166＠bellatlantic.net

> >Subject: RE: Discharging a VT100 CRT > From: "Julian Wolfe" <fireflyst at earthlink.net> > Date: Wed, 09 Nov 2005 13:17:26 -0600 > To: "'General Discussion: On-Topic and Off-Topic Posts'" <cctalk at classiccmp.org> > >How much are you asking for the monitor board? > >-----Original Message----- >From: cctalk-bounces at classiccmp.org [mailto:cctalk-bounces at classiccmp.org] >On Behalf Of Useddec at aol.com >Sent: Wednesday, November 09, 2005 1:14 PM >To: cctalk at classiccmp.org >Subject: Re: Discharging a VT100 CRT > >Hi, > >I have the logic board, power supply, and what we used to call the "monitor >board" in stock. I worked on a lot of these when I worked for Digital. I >now >deal in DEC parts. > >Thanks, Paul > Make sure it's the correct one. There are three versions for the differing monitors. The monitor portion were made for DEC to spec and could be Ball brothers, Moto or I forgot. Allison

19 years, 1 month

valid classiccmp email addresss?

by julesrichardsonuk＠yahoo.co.uk

I just noticed that Al (and occasionally a few others) send email to 'classiccmp at classiccmp.org' rather than the usual cctalk / cctech addresses. Is that a valid address? It's obviously working, I just don't filter on it in my mail client and was wondering whether I should be or not! :-) (IIRC that was the list address prior to the cctalk/cctech split a while back, but I assume Jay might be ditching it one day if so) cheers Jules

19 years, 1 month

help - 11/34 console problem -- first LA output

by henk.gooijen＠oce.com

Tony wrote: > > > > Making your own pod...! Again, points earned Tony! Chapeau! :-) > > Well, back when I got that instrument, _any_ LA was > expensive. The only way I could afford one was to get one > missing the pods. And I'd done a fair amount of ECL work for > my Ph.D, so when I found the inputs were actually > differential ECL signals, it didn;t worry me too much. > > -tony Ah. Ok then. I never worked with ECL, so that is totally unknown territory for me. You had a jump start then :-) I continued working on the 11/34 console board. Made a few new measurements (display and keypad). I am still figuring out what I have seen. I am a bit reluctant to remove an IC from the board, put in a socket and a new IC, just to find out that I overlooked something and the replaced IC was not bad. I have the impression that the strobe pulse to latch the 74175 that outputs the 3-bit code to the 7447 display driver is issued at a way to low rate. I seldom see this pulse, but expect it to see quite often as it must for multiplexing the display ... To support this repair I will write up a webpage with the LA pictures. I will mention the URL here. Very soon ... thanks for all input so far, - Henk, PA8PDP. This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

19 years, 1 month

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test-drb November 2005