test-drb September 2005

test-drb@ccmp.vtda.org

212 participants
437 discussions

by jrkeys＠concentric.net

First message came back? ----- Original Message ----- From: "Keys" <jrkeys at concentric.net> To: "cctalk at classiccmp" <cctalk at classiccmp.org> Sent: Sunday, September 11, 2005 11:11 AM Subject: New Toy Coming > First part of October I will be getting a custom build prom-programmer > with software that programs and reads 2716's. And two Tektronix tube > scopes, one from 1954 and one from 1960. Also a prototype Commodore 64.

19 years, 3 months

GPIB state machine info WTD

by philpem＠dsl.pipex.com

Hi, Does anyone happen to have any data on the GPIB state machine, or perhaps a GPIB slave interface implemented in LSTTL? I'm trying to rig up a CPLD to take some of the load off the microprocessor in one of my projects, but the GPIB is troublesome to say the least. I've got a copy of the HP "Tutorial guide to HPIB" and "PET and the IEEE488 Bus", but none of them cover the state machine... Thanks. -- Phil. | Acorn RiscPC600 SA220 64MB+6GB 100baseT philpem at philpem.me.uk | Athlon64 3200+ A8VDeluxe R2 512MB+100GB http://www.philpem.me.uk/ | Panasonic CF-25 Mk.2 Toughbook ... I may not always be perfect, but I'm always me.

19 years, 3 months

SWPC Digi-Vista Nixie Clock

by swtpc6800＠comcast.net

I finished my Nixie tube clock. (My first try at this was around 1971.) http://www.swtpc.com/mholley/PopularElectronics/Dec1970/PE_Dec1970.htm I could not figure out how to wire the tens of hours module to the hours module. The magazine article was very vague and even misleading about that. So one night I sent an email to Gary Kay, the designer, and the next morning I had a response. How is that for tech support 35 years after the fact? Gary Kay later designed many of the SWTPC 6800 computer systems. http://www.swtpc.com/mholley/History/Gary_Kay.htm http://www.swtpc.com/mholley/BYTE/BYTE.HTM Michael Holley

19 years, 3 months

SWTPC Digi-Vista Nixie Clock

by swtpc6800＠comcast.net

> I would have updated the high voltage power supply to a simple > transistor regulator. I have about 128 AC around here and that > can really give over voltage on 115 V transformers. > PS. Where do you find a 300 V transformer ... I may build one > some day. Also any options for a ALARM feature? Say a analog > bird chipring sound? I wanted to build an exact copy of what was in the magazines. I found all of the parts, some were slightly different. The MJE3055 power transistor came in a TO-127 package, The MJE3055T is now more common but comes in a TO-220 package. I made the board for the TO-220 package. (The TO-127 style cost me $15 the last time I needed one.) I got the Stancor PS-8416 (250 VCT) power transformer on eBay, two of them cost me about $25 including shipping. The seller, solderfume, has more for sale now, see eBay item 5807358404. I ordered boards for 3 units. I work with a guy who is restoring a 1957 Ford Panel truck that he got from his late uncle. This is a 3 or 4 year project. He doesn't understand why I restore TV Typewriters, 6800 computers and such. What good are they? Michael Holley www.swtpc.com/mholley

19 years, 3 months

"rescue" from work- anybody need Apple IIe/II+/IIc Print Shop?

by compoobah＠valleyimplants.com

Pulled this out of a trash can yesterday- Broderbund's Print Shop for the Apple II+, IIe, IIc (and greater). In original blue box with the paper and envelopes inside, wohoo. I have no Apple II equipment, but I didn't want to see it junked, so does anybody want it? I'd like whoever wants it to consent to a "no-sale" agreement, since it came out of a school.

19 years, 3 months

VMS Question...

by ajp166＠bellatlantic.net

> >Subject: Re: VMS Question... > From: Sridhar Ayengar <ploopster at gmail.com> > Date: Tue, 06 Sep 2005 17:15:34 -0400 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > >Roger Merchberger wrote: > >>> Why don't you get a VAXstation 4000/vlc? It's one of the tiniest >>> pizza-box cases I've ever seen. >> >> >> Because for some that are tight on space, you still have a monitor, >> keyboard, possibly a mouse, a desk to actually stick it all on, etc. > >You don't need a monitor, keyboard or mouse. It's quite possible to run >one with a serial console, so if you have any machine with a serial >port, a terminal emulator program and a null-modem cable, you're in >business. I even skip that. Most of the 3100s (and uVAX in general) can be booted and run headless. So when I need to connect to mine I use a VT1200 Xterm over the network and I suppose a PC could be configured for that. That reduces the working system to a pizza box somewhere in the room on the network. Allison

19 years, 3 months

PDP-8 in Volkswagen

by brian＠quarterbyte.com

Got it, thanks!

19 years, 3 months

PDP-8 in Volkswagen

by aek＠bitsavers.org

A 2" image of it appears in "Images of America, Digital Equipment Corporation" on page 28 The picture is from the front cover of "On Line" Mar-Apr 1965

19 years, 3 months

GPIB state machine info WTD

by dwight.elvey＠amd.com

>From: "Ethan Dicks" <ethan.dicks at gmail.com> > >On 9/9/05, Philip Pemberton <philpem at dsl.pipex.com> wrote: >> Hi, >> Does anyone happen to have any data on the GPIB state machine, or perhaps a >> GPIB slave interface implemented in LSTTL? > >TNW made a serial interface for the PET that did not contain a >microprocessor. Perhaps you could search for schematics on that. > >> I've got a copy of the HP "Tutorial guide to HPIB" and "PET and the IEEE488 >> Bus", but none of them cover the state machine... > >With that as a guide, if you don't find an existing state machine, >there's plenty of information to generate one of your own. You could >even prototype one in software. > >-ethan > > Hi As I recall, the GPIB chip made by TI ( forget the number ) had a data sheet that explained the states. Not much to it as I recall, mostly just handshake stuff and address recognition. It seemed like there was some timed stuff that might not work well in software but for the most part I'd suspect that Ethan is right, one could do it all in software. Dwight

19 years, 3 months

PDP-8 in Volkswagen

by brian＠quarterbyte.com

Hi, First off, thanks to all who replied to my earlier question about the history of the CP/M BIOS. Now -- does anyone have a copy of the DEC magazine ad for the original PDP-8 that showed it in the back seat of a Volkswagen Beetle convertible? A high-res scan would be preferable, but whatever -- I can't find it using Google images. Thanks Brian =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _| _| _| Brian Knittel _| _| _| Quarterbyte Systems, Inc. _| _| _| Tel: 1-510-559-7930 _| _| _| Fax: 1-510-525-6889 _| _| _| Email: brian at quarterbyte.com _| _| _| http://www.quarterbyte.com

19 years, 3 months

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test-drb September 2005