test-drb January 2002

test-drb@ccmp.vtda.org

303 participants
1201 discussions

[PDP8-Lovers] Re: if you hadn't already known this about the PDP-8

by jones＠cs.uiowa.edu

Mark Crispin <MRC(a)CAC.Washington.EDU> wrote: > Stacks are very useful, but they are not the solution to everything. Absolutely agreed. > One of the biggest deficiencies of C is its lack of co-routines, since > it only has the stack style of subroutine calling. Yeah, I know about > setjmp/longjmp, but those are one-way, not true co-routines. Well, setjmp and longjmp are pretty powerful. see http://www.cs.uiowa.edu/~jones/opsys/threads/ for a machine-independent user-level thread package implemented in C using setjmp and longjmp for control transfers between threads. It comes very close to what a real coroutine afficianado would like. (Writing the thread launch code in a machine independent way was murder.) Curiously, the same thing can be done without longjmp()! I had a student write me a thread package in Pascal once. All he needed was a mechanism to convert pointers to integers and back again (easy enough in standard Pascal, so long as it doesn't check variant records). Given this, his code did essentially the same thing as my thread package. > Of course, talking about co-routines to youngsters is likely to get > their eyes to glaze over, since they won't have a clue as to what I'm > talking about. Indeed. Doug Jones jones(a)cs.uiowa.edu

22 years, 10 months

Computer Museum of America on Tuesday night's PBS NOVA (fwd)

by vcf＠vintage.org

FYI... ---------- Forwarded message ---------- Date: Thu, 31 Jan 2002 09:46:19 -0800 From: David Weil <dweil(a)computer-museum.org> Subject: Computer Museum of America on Tuesday night's PBS NOVA Last April, a film crew from Boston came to Computer Museum of America at Coleman College to film the staff operating several machines in the Museum collection. See the results this coming TUESDAY night on PBS NOVA at 8pm. -- 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

Free "classic" junk in SF bay area

by pcw＠mesanet.com

1 Shugart SA801 8" floppy drive 1 IBM 5151 AT computer 10 Reels 9 track tape - used... 1 VOXPC ISA voice synth Free for pickup in SF bay area... Peter Wallace

22 years, 10 months

Connectors (was: NEXT Color Printer find

by CLeyson＠aol.com

Fred Cisin wrote > In place of current accepted sloppy terminology, > how many remember what they were called THEN? Most of the engineers I work with have never heard of Amphenol or Cannon, let alone "blue range" or "red range" (popular Cannon connectors) It's a classic chicken and egg thing. Ampenol connectors were adopted as a "standard" connector for Centronics printer, IEEE-488 and SCSI interface, but are often mis-named. As I don't have an Amphenol catalogue to hand, I'm afraid I can't tell you what Amphenol's designation is for this connector. On the subject of D-sub connectors I've sometimes come across some with metric threaded jackscrews instead of the usual UNF thread, or is it UNC ? Chris Leyson

22 years, 10 months

Nuclear Data 66?

by mtapley＠swri.edu

>Has anyone ever heard of Nuclear Data? I found this cool-assed computer >today. It's an all-in-one unit (CRT/keyboard/diskdrive/CPU) and is fairly >big (say, as big as an IBM Datamaster, bigger than a PET). Yes. I saw one recently in a big pile of equipment SwRI was surplussing. I couldn't divert it from the surplus stream. It was supposed to go to a surlpus dealer around here, whose name is on a piece of paper on my desk, which is bad news because I may never see it again. I can excavate if you need it, no promises though. Don't recall whether it was a '66. It seemed to have some o-scope or data acquisition type functions on it as well as computer stuff - I did not look closely. - Mark

22 years, 10 months

Another Nile in North East

by dancohoe＠oxford.net

There's another Nile with 4 large racks of drives in a scrapyard in Ottawa. I doesn't look like it's been there long. I should have spent more time checking it out. Likely Mike Kenzie could take a look at it and report back since I only get to Ottawa occasionally. Please see my post to follow with questions on the Pyramid 90x. Dan Cohoe

22 years, 10 months

so, can you run UNIX on a PDP11/03 or not?

by mcguire＠neurotica.com

On January 31, Gunther Schadow wrote: > Also, has anybody ever run a VAX11 in PDP mode for real? Sound > pretty wild to me to spend so much money only to not use the > virtual memory. The only use of the vax11's pdp11 compatibility mode that I've ever heard of was to run RSX-11 binaries under VMS. -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

22 years, 10 months

Netscape (was Re: PayPal = payola?)

by DAW＠yalepress3.unipress.yale.edu

> ---------- > From: Doc > <<<<<clipped>>>>> > But I think that in a day or 2 I'll probably be tied for the > *smallest* classic Unix box in the house. Part of this weekend's haul > was an SE/30, I found an ethernet adapter today, and I went to storage > this evening and dug out the 4M 30-pin SIMM stash. A/UX here I come.... > > Doc > ------- Doc --- Well, if I have my way, my Gateway Handbook will be a smaller Unix box... 10" x 6" x 1.5" ;-) And it just squeaks by 10 years old too ( I think, maybe 9...) --- David A Woyciesjes --- C & IS Support Specialist --- Yale University Press --- mailto:david.woyciesjes@yale.edu --- (203) 432-0953 --- ICQ # - 90581 Mac OS X 10.1.2 - Darwin Kernel Version 5.2: Fri Dec 7 21:39:35 PST 2001 Running since 01/22/2002 without a crash

22 years, 10 months

Docs for Sonic IIci/SE30 Ethernet?

by doc＠mdrconsult.com

I need the jumper settings. The base card has 2 3-pin jumpers, J4 and J5. J4 is labeled A and 9, and J5 isn't labelled. The daughtercard has 2 18-pin (I think, maybe 20-pin) DIP sockets, labeled AUI & BNC, and the AUI socket has a DIP module that looks like a straight jumper block. I've got OS 7.1 installed, and "Ethernet Inside" sees the card, but it fails all tests. I'm not willing to go for the "hosed" option yet. And no, of course there's no part number anywhere. It has a right-angle PDS pass-through, what looks like an empty FPU socket, and AUI & BNC connectors. Thanks, Doc

22 years, 10 months

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

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk] > Sent: 29 January 2002 20:08 > To: classiccmp(a)classiccmp.org > Subject: Re: 1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!) > > Let me see if I get this. Somebody is stripping a useable (or > at least > repairable) plotter becsue the packing box is falling apart??? Calm down Tony :) I'm not stripping it because the box is tatty; I'm stripping it because it's a) bust and b) more use to someone else as spares than it is for me since I've already got 2 in the museum and don't need a 3rd broken one... a

22 years, 10 months

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test-drb January 2002