Mark Crispin <MRC(a)CAC.Washington.EDU> wrote:
> Stacks are very useful, but they are not the solution to everything.
> 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
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.
---------- 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 *
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 ?
>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
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.
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.
St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf
> From: Doc
> 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....
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
--- (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
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.
> -----Original Message-----
> From: ard(a)p850ug1.demon.co.uk [mailto:firstname.lastname@example.org]
> 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...