test-drb January 2002

test-drb@ccmp.vtda.org

303 participants
1201 discussions

by pete＠dunnington.u-net.com

On Jan 30, 15:36, Marvin Johnston wrote: > > What is the voltage, current, and style of the lamps used on the PDP-8 > series of computers? I recall seeing 14V, 28V lamps both mentioned, but > no current ratings. My PDP-8/E uses 12V or 14V bulbs, running off an 8V (nominal) supply. I'm sure I posted some of the details to the list not very long ago, when I was thinking about replacing the non-original LEDs with original bulbs. Other models may very well be different, though. -- Pete Peter Turnbull Network Manager University of York

22 years, 10 months

9 track tapes

by pete＠dunnington.u-net.com

On Jan 30, 18:19, Dave McGuire wrote: > On January 30, Matt London wrote: > > Quick question, I've got a Cipher F880 here (no tapes yet - anyone in > > the UK wanna help out? :&) and someone just asked me what the maximum > > capacity of the drive is.... > > The Cipher F880 is a 1600bpi drive, if memory serves. It might also > do 800bpi. Capacity depends on the block size...but on average, at > 1600bpi on a 2400' reel, you'll get about 40MB or so. That's what I thought, but I didn't want to be the first to reply because I'm not really sure. If it does support both 800bpi and 1600bpi, and you're in the UK not too far from York, I have an 800bpi tape which I can't read on my 1600bpi drive, and would like copied sometime. It's an original 7th Edition distribution tape from the UK distribution centre at HWU, and I've wanted to put it on the PUPS archive for a long time. Apart from the fact that it's probably the tape used for the machine sitting a few feet away frm me, which also came from HWU. -- Pete Peter Turnbull Network Manager University of York

22 years, 10 months

VT131 needs keyboard help

by csmith＠amdocs.com

> -----Original Message----- > From: Ethan Dicks [mailto:erd_6502@yahoo.com] > Keyboard error. It's _possible_ the keyboard error is in the VT131, > but not as likely as in the keyboard. If you have a VT100 or VT101, That was my thought... > VT105, etc., you could test that keyboard in another terminal; but if > you just have the VT131 as your sole example of DEC keyboards, that's > a bit of a problem. This is actually the only one I've ever met. I have seen pictures and layout diagrams, though, and it _looks_ (IE the keys are the same) like a VT100 keyboard. On the other hand, that other terminal _looked_ (The case, etc, was nearly identical) like a VT100... > If the label hasn't fallen off, ISTR that there was a paper sticker > with the Digital logo and some numbers on the bottom. Fallen off, or not there in the first place. :/ > It's possible, if you can't find a vendor description anywhere, that > you picked up a keyboard for another terminal. Lots of folks > used 1/4" > jacks for keyboards in those days, even Apple (on the Lisa). Yes, but again, it's not the jack that makes it look the same -- it really does look like (at least a carbon copy of) a VT100 keyboard. See my comment above about the other terminal, though. It certainly isn't a Lisa keyboard. I have both the working machine, and a not-so-working machine, each with the keyboard. Anyway, the apple markings would give it away... > If it's a DEC keyboard, it should be compatible. I am not aware of > any major changes in keyboards, save VT100 vs LK201 and the like > (different protocol, I presume; different appearance, > different connector, > etc.) Yep. :) That's what I thought, anyway... So I'm assuming for now the keyboard is bad, or incompatible. Perhaps I could modify it either way, given the schematics for the keyboard... > > Failing a way to positively identify the keyboard, are there any > > common modes of failure along these lines? > Dead chip in the keyboard, usually. We never fixed them when I used > VT100s on a daily basis. We threw them into a box in the > back room and > grabbed a different (working) one from stock. The fact that we were > shrinking on an annual basis meant that we never had to buy a terminal > again after we hit our peak in 1984. Do you know anything about the type/location on the board of this chip? > Off of a good terminal? I presume that you could find a VT100 from a > 3rd party vendor. Don't know what they sell for these days. Hmm.. VT100 keyboard schematics, anyone? :) I'd really like to make this into a console for my PDP-11. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

22 years, 10 months

1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!)

by Lee.Davison＠merlincommunications.com

Where 'locally' is either a misprint for 'luckily', or it's the name of a small hamlet in Wales, not marked on any map. That would be Llocaly, it's near Cwmfishin. Lee. ---------------------------------------------------------------------------- ---- This email is intended only for the above named addressee(s). The information contained in this email may contain information which is confidential. The views expressed in this email are personal to the sender and do not in any way reflect the views of the company. If you have received this email and you are not a named addressee please delete it from your system and contact Merlin Communications International IT Department on +44 20 7344 5888. ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________

22 years, 10 months

Dec PDP-8 Lamps

by marvin＠rain.org

What is the voltage, current, and style of the lamps used on the PDP-8 series of computers? I recall seeing 14V, 28V lamps both mentioned, but no current ratings. In checking out Chicago Miniature (http://www.sli-lighting.com/cml/electronic/index.cfm), it looks like they have quite a few lamps that might fit the bill. http://www.sli-lighting.com/cml/databookpdf/2-47.pdf is the PDF file I was checking.

22 years, 10 months

AN/UYKs

by healyzh＠aracnet.com

> Isn't that the DoD designation for a PDP-8? We'll, I've seen Sperry-Rand, Harris, Unisys, and Honeywell systems with that designation. It all depends on the number after the AN/UYK- as to what it's the designation for. Zane

22 years, 10 months

Small UNIX boxes (was RE: Netscape (was Re: PayPal = payola?))

by ceby2＠csc.com

Toth -- I'm afraid the P70 keys are different. They apparently built a special keyboard just for this class of machine. I have a couple experiments in mind as far as my own junk keyboards are concerned, but I haven't had a chance to diagram out the mechanism so I can cross-breed something. The ideal situation is a key from a dead P70. But I'd just be happy not to keep slapping my finger into the empty socket everytime a rewrite a host file or something. Sighhhh. Thanks for thinking of me though. Colin Eby Senior Consultant CSC Consulting

22 years, 10 months

9 track tapes

by mcguire＠neurotica.com

On January 30, Matt London wrote: > Quick question, I've got a Cipher F880 here (no tapes yet - anyone in > the UK wanna help out? :&) and someone just asked me what the maximum > capacity of the drive is.... The Cipher F880 is a 1600bpi drive, if memory serves. It might also do 800bpi. Capacity depends on the block size...but on average, at 1600bpi on a 2400' reel, you'll get about 40MB or so. -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

22 years, 10 months

Here I Am

by vcf＠siconic.com

Not that anyone cares, but if you've been trying to contact me for the past 10 days and I have not responded, it is because: a) I was on vacation b) When I got back I discovered some little punk assed bitch had hacked into my server and it had to be taken off the local network where it sits for security reasons. I'm only now getting this stupid server reconfigured properly again. All I can say is for all my Linux evangelizing, it still as a LONG way to go towards ease of setup. I thought SuSE was going to make things much easier but I must say I had about as much trouble with SuSE as I did with my old Red Hat setup. Fooey on crappy Linux installs. Fooey on lame-o's who waste my time by stumbling their way into my server and causing me to lose precious time. Anyway, I hope this actually makes it out of here. And I hope whoever is trying to contact me will be able to get through successfully. It will still take me a day to work out bugs and get back to anyone who's e-mailed me, so I appreciate your patience. Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

22 years, 10 months

9 track tapes

by classiccmp＠knm.yi.org

Hey ho people :&) Quick question, I've got a Cipher F880 here (no tapes yet - anyone in the UK wanna help out? :&) and someone just asked me what the maximum capacity of the drive is.... Anyone care to enlighten me? -- Matt --- Web Page: http://knm.org.uk/ http://pkl.net/~matt/

22 years, 10 months

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test-drb January 2002