test-drb March 2005

test-drb@ccmp.vtda.org

291 participants
840 discussions

by julesrichardsonuk＠yahoo.co.uk

Don't suppose anyone's come across anything that'll attempt to fix a corrupt .Z (Unix compress) file, have they? I've got a 40MB compressed tar archive here, but uncompress barfs after the first 23MB - it'd be nice if there was a way of skipping over the duff bits if possible and reading *something* from the last 17MB! cheers Jules

19 years, 4 months

Not sure who all is near York University

by brain＠jbrain.com

But if you do: If you have the time and interest to wander out to York U on a Friday morning: I've been asked to make a presentation there. My theme (if I don't wander too far off the subject) is "Computer hobbyists of the 70s and 80s" - mostly from a Commodore user perspective, of course. It runs about an hour. This is in connection with a computer museum at York; a bunch of older computers (including lotsa Commodores) will be on display. A little more information can be found at: http://www.cs.yorku.ca/museum/events/events.htm (gosh, I think they must have retouched my photo). And the YorkU host, Zbigniew Stachniak, says: >> Since our history of computing lecture series event is open to anyone, >> you are, of course, free to bring with you anybody who is interested >> in your lecture. > > So come along if you have time and inclination (like the guy who leaned his grandfather clock agains the wall), and we'll all revise history together. :-) --Jim Butterfield Jim "the other Jim" Brain. -- Jim Brain, Brain Innovations brain at jbrain.com http://www.jbrain.com Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times!

19 years, 4 months

Ottawa collectors in the news

by dave04a＠dunfield.com

In case anyone is interested: CJOH news in Ottawa is running a segment on local collectors of classic computers. The camera crew was here this afternoon, and they visited Mike K's on sunday. It will air as a segment on the "Tech Now" section of this Sunday 6:00pm newscast (March 6). Local Ottawans can tune CJOH directly, anyone with ExpressVu (Canadian satellite) should be able to get it on channel 196 at the above date/time. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

19 years, 4 months

PDP-1 project milestone

by eric＠brouhaha.com

The PDP-1 Restoration Project is still far from complete, but we hit a major milestone tonight. When we last tried to run Spacewar, the sun and player ships would not display correctly, though the starfield and torpedos seemed to be fine. We ran the DEC instruction diagnostics and they failed on the shift/rotate test, though all the diagnostics had passed a few months earlier. This week we wrote a more specific diagnostic program and determined that left shifts and rotates of the I/O register were not doing anything, though right shifts and rotates of the I/O register were fine, and all shifts and rotates of the accumulator were fine. After a little study of the print set, we identified two system modules that could cause the observed behavior. We tried replacing one of them, a 1607 pulse amplifier. After replacing the 1607, our own diagnostic and the DEC diagnostic both passed. Some of the team wanted to go home without trying out Spacewar, but the rest of us nagged until they gave in. We loaded it, and it ran correctly. Spacewar on the real Type 30 display with long persistence phosphor is a thing of beauty! Some of the tasks remaining to be done: * build new Spacewar control boxes * continue repair/testing of Soroban console typewriter * adjust Type 30 display to factory specs (linearity is poor) * adjust paper tape reader sensitivity/threshold * diagnose & repair suspected flaky memory "module" 0 * voltage margin checks, run all diagnostics * install new belt and test BRPE tape punch Eric

19 years, 4 months

Canon Cat -- what's it really like?

by dwight.elvey＠amd.com

>From: "Eric Flanzbaum" <elf at ucsd.edu> > ---snip--- >Given what others have posted in this thread about the Cat, I'm under the >impression it is basically a editing machine (with some fancy features >built-in), along with a back door into Forth. Almost a glorified word >processor, if you will. > >Was there much (if any) 3rd party software developed for it -- which >expanded beyond its native capabilities? > > Hi Not that I know of but there are others that might have more information on this. From my playing with it, you can not directly execute code from the disk. Even to run Forth, you have to select the code from the screen before it will execute. This isn't hard to do but not the same as running a program on the disk. There might have been some way to do it but the Cat only seems to use the disk for text storage. Once in Forth, I believe one can take over the machine and treat it like a normal processor. I'm sure there must be a trap-door in there someplace to load code from disk but I've not explored what can be done from Forth, other than, when I first got it, to look through the memory to determine where the ROM images were. I do know one of the fellows that wrote code for it and I've been meaning to pick his brain some time. For the curious, it is a great machine. There is so much in there to explore. and even a way to do it ( Forth is like a super monitor ). Dwight

19 years, 4 months

Canon Cat -- what's it really like?

by elf＠ucsd.edu

Ron Hudson wrote: > sounds to me like emacs is to lisp as cannon cat is > to forth, at least to some extent. It does have that ring to it, huh? Given what others have posted in this thread about the Cat, I'm under the impression it is basically a editing machine (with some fancy features built-in), along with a back door into Forth. Almost a glorified word processor, if you will. Was there much (if any) 3rd party software developed for it -- which expanded beyond its native capabilities?

19 years, 4 months

List subscribtion

by hachti＠hachti.de

Does anybody know why my list subscribtion has been cancelled? I wasn't receiving any messages since February 26. Now I have subscribed again. But I don't know what happened..... Philipp

19 years, 4 months

Re installing XP on Sony

by dwight.elvey＠amd.com

You seemed to have left out a few words so I thought I might help a little. >From: "Jim Isbell, W5JAI" <jim.isbell at gmail.com> > >No, this is NOT a PC support list, it is a general list for computer ^ classic >talk which is what my post is. If you need to be "on topic" go to the ^ not >cctech list. > > Hi This is an un-moderated "clasic computer" list that tolerates some off topic post. Also, it is self regulating in that many off topic post may be flamed. Members should refain from posting replies to post that, if allowed to continue, damage the list in general. Even when they know the answer. I'll admit that I've not always been able to stop myself but many times I have. What to do with Windows XP is way outside of topics covered under clasic computers. The worst of it is that this list most likely has only a small percentage that are up on dealing with XP. Most just use it only when needed and for nothing else. We are not trying to turn you off towards the list but help you realize that there are better places to handle your particular problem. Dwight

19 years, 4 months

Reply-To: behavior was Re: imaging DC600A QIC tapes

by pete＠dunnington.u-net.com

On Mar 3 2005, 10:03, Tom Jennings wrote: > On Thu, 2 Mar 2005, Pete Turnbull wrote: > > > Probably because Jules' mailer is inserting an unecessary "Reply-to:" > > header (pointless, since it's supposed to be used only when you want > > replies to go to somewhere other than the "From:"), and then mailman is > > applying the principle of "least modification" and *appending* the > > classiccmp address, rather than replacing the one Jules' mailer put in. > > > > I've noticed this with posts from one or two other listmembers. > > I think Jay's right -- mailman may have changed, but it's not > necessarily incorrect. There are few subtleties involving > To:/Reply-To: processing but it's one of those things a lot of > MUAs make configurable. Pine's "reply-always-uses-reply-to" in > feature-list, for example. I'm not suggesting there's anything wrong with mailman -- in fact, applying "least modification" is The Right Thing. You are only allowed one "Reply-to:" line per message, and mailman is quite properly not discarding existing information. I just don't think any MUA should create a "Reply-to:" if it's the same as the "From:" or "Sender:". As for Pine using "Reply-to:" for replies, that's what the RFCs say you *should* do if a "Reply-to:" is present; it's purpose is purely to override the "From:" when replying. -- Pete Peter Turnbull Network Manager University of York

19 years, 4 months

working MITS Altair 8800 & manual

by dogas＠bellsouth.net

19 years, 4 months

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test-drb March 2005