test-drb May 2005

test-drb@ccmp.vtda.org

248 participants
723 discussions

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HP keyboard

by aek＠bitsavers.org

will this work? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1504&item=7518967488

19 years, 1 month

Need Digital VT102 and Hewlett-Packard A1099B Keyboards

by david_comley＠yahoo.com

Ah - thanks for catching that. I didn't know they were different beasts. --- Eric Smith <eric at brouhaha.com> wrote: > You need > an HP-HIL keyboard. HP-IL and HP-HIL are entirely > different > interfaces. __________________________________ Do you Yahoo!? Yahoo! Mail - Helps protect you from nasty viruses. http://promotions.yahoo.com/new_mail

19 years, 1 month

Need Digital VT102 and Hewlett-Packard A1099B Keyboards

by david_comley＠yahoo.com

OK - that would improve my chances of finding one. Of course the chances of finding either one are probably still slim but it never hurts to ask. --- Ethan Dicks <ethan.dicks at gmail.com> wrote: > On 5/28/05, shoppa_classiccmp at trailing-edge.com > <shoppa_classiccmp at trailing-edge.com> wrote: > > > I need a VT102 keyboard (the original DEC one) > > > > Didn't all the VT1xx use the same keyboard, the > one with the stereo > > phone plug on the end? > > > > That makes it easier, you just need any VT100-type > keybaord. > > Yes... the only real variations were the keycaps > (plain, WPS...) The > protocol and plug are the same for all VT1xx > terminals (and > VT278/DECmate I, VT180/Robin, VT103/LSI-11...) > > -ethan > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

19 years, 1 month

cctech Digest, Vol 21, Issue 45

by hatfield＠bellsouth.net

> Message: 4 > Date: Fri, 27 May 2005 01:27:53 +0100 (BST) > From: ard at p850ug1.demon.co.uk (Tony Duell) > Subject: Re: Neon logic > To: cctalk at classiccmp.org > Message-ID: <m1DbShh-000Iy3C at p850ug1> > Content-Type: text/plain > >> >> Reading would actually be the easy part- drop a phototransistor in >> (optical) >> line with the NE - pricy but doesn't affect the stored data. > > I believe somebody made a neon matrix ROM -- have an electically > rectangular array of neons with some present, others not. By applying > suitable voltages to the X and Y wires, a particular location is > addressed and the neon there fires (if there is a neon at that location), > but none of the others do. > > There was a photomultiplier aimed at the neons to detect the light flash. > I seem to rememebr there was the well-known problem that neons in the > dark don't fire reliably, which was got round by firing another neon just > before addressing a location (this neon could have a high enough voltage > applied to it to make sure it always fired reliably) and then ignoring > the extra pulse from the PM tube. > > Of course this did not use the memory property of the neons themselves -- > the data was stored by which neons were fitted. > > I wish I could remember which machine used this. Maybe something like > EDSAC 2? > > -tony In 1958, I joined the Western Electric group developing electronic switching systems to replace electromechanical devices currently in use. There had been two previous complete office designs that were discarded, one of which used a matrix of neon bulbs as a switching matrix. The method was evidently using an X and Y "mark" that caused a random bulb to fire. I saw movies of the display but never the real thing since the design had preceded me for quite some time. There was an uncomfortable moment when a cameraman focused on a unique bulb in the matrix and asked a technician to make that particular one "fire". Being random, there was no way to direct such an action. Fred.

19 years, 1 month

DECmate II -> VR201 cable?

by waisun.chia＠gmail.com

A quick one: What is the cable that connects the DECmate II to a VR201? TIA.

19 years, 1 month

BBS documentary

by jfoust＠threedee.com

It was mentioned on Slashdot yesterday because it's now available: http://slashdot.org/article.pl?sid=05/05/25/0023230&tid=97&tid=162&tid=1 although I don't know if that's new news, and it was mentioned in Evan's newsletter, but perhaps list members would enjoy seeing other well-known list members in the photo album: http://bbsdocumentary.dreamhost.com/photos/interviews.html Boy, those guys are getting old! :-) - John

19 years, 1 month

Intel databooks needed ($$$)

by vcf＠siconic.com

New bounty! I need the following databooks: 1. 386SL Microprocessor SuperSet System Design Guide (1990) 2. 386SL Microprocessor SuperSet Programmer's Reference Manual (#240815) 3. 386SL Microprocessor SuperSet Data Sheet (#240814). Would prefer to buy but would also consider a loan arrangment. Please contact me directly if you have these. Thanks! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

19 years, 2 months

FOR SALE: PDP-11

by john＠guntersville.net

I received this from a friend this evening and figured that sombody on the list may be interested. Contact the owner directly for info. FOR SALE: PDP-11 Over the years 1979-1985 this began as a PDP-11/03, evolved to a /23 and then to a /73. It went to sleep in 1986 when I got my 1st PC and has been asleep since. That is an 80Mbyte RM-03 multi-platter disk drive beside it. The OS I used was RSX-11M+ I would not plug this thing in on a dare!! I'm not sure what boards are still in it. The /73 CPU was sold years ago but I think there are still some /23 boards here. (Maybe) I'll sell to high offer by Labor Day evening -- 6:00 PM See this awesome machine at 103 Nolen Circle.... Just outside Monte Sano Park, Huntsville, AL. Or call (256) 533-6337

19 years, 2 months

OT: Couple of google groups questions

by aek＠bitsavers.org

> Nobody uses Usenet any more (much to my own personal chagrin as I found it > very useful for many things, as I'm sure others did/do). As someone who has maintained the spies.com newsfeed for 10+ years, we've lost two big news feeds in the past year (SGI and Apple). Apple dropped news connectivity at the end of last year because they were no longer willing to pay for the connectivity cost, and there were less than 100 people reading news in the whole company. SGI just disappeared one day, never did hear why. This is a drag... I prefer being able to quickly scan 20+ USENET groups over N+ web URLs.

19 years, 2 months

Remembering RAMAC

by ajp166＠bellatlantic.net

> >Subject: Re: Remembering RAMAC > From: "Dwight K. Elvey" <dwight.elvey at amd.com> > Date: Fri, 27 May 2005 09:44:38 -0700 (PDT) > To: cctalk at classiccmp.org > >>From: "Vintage Computer Festival" <vcf at siconic.com> >> >---snip--- >> >>I was thinking more in terms of space. A disk is much more efficient in >>this regard. You can stack N times the number of disks in the same space >>that a drum takes up. >> > > The problem with disk, of course, is the variable BPI. >Today, with the electronics so cheap, the CD-ROM is made >with a spiral track and it runs at a constant BPI by >changing the rotation speed as it reads the disk. >Dwight > The big advantage and values of drums was high inerta plus parallel heads. Some designs were 16bits wide (maybe there were wider) plus timing tracks. So while small ( I remember the 128kw swapping drum on the KA10s) they were extremely fast. Of course late in the game was the 32kW RS08 disk for the PDP8 systems. Small but very fast word wide storage. Every so often I get the itch to find a small drum and get it working. Allison

19 years, 2 months

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test-drb May 2005