Also used by C3, Sperry and Unisys for the 48 workstation serial link under
CTOS/BTOS.
-----Original Message-----
From: John Rollins <rexstout(a)ptld.uswest.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Tuesday, February 17, 1998 9:02 PM
Subject: Re: GP-IB (was Re: Atari 8-bit Find)
>
>>>Which reminds me: why didn't IEEE-488 ever become a big hit in the
>>>computer biz? It's been around since the 60's, is standard, has good
>
>Maybe because the cables are so expensive?
>
>>It's used by:
>>
>>Commodore Pets
>>GRiD Compass
>>HP 3000
>>HP 1000 (I think)
>>
>>Probably others...
>And don't forget the HP 9000... Actually, HP uses their own variant, called
>HP-IB. It's probably compatible with GP-IB, but I'm not sure. I have an
>8-bit ISA HP-IB controller around here somewhere, but nothing to use it
>with(at least not yet).
>
>-JR http://members.tripod.com/~jrollins/index.html - Computers
> http://www.geocities.com/Area51/Lair/1681/ - Star Trek
>
>
<Are these all water machines? There are some air-cooled versions that ar
<probably reasonable.
Water cooling isn't that bad. You could use heating compoents for
pumps if needed and heat extraction from the water could be a automotive
radiator with a blower to room air. Of cource the room temperature would
rise but for short term ops that would work.
<Yes, the 400 Hz would be a problem, almost as much as a cooling system (i
<one went with a water machine - probably too big of a headache).
Assuming you need 50kw, if it were say 10kw or less the scale of things
drops to more managable proportions.
Allison
<the only thing that could cause this would be the 6845 CRTC chip (IC2 on
<my schematic). The cursor signal is produced by that chip (at least in
Unlikely but possible. More likely is a memory address error. A stuck
address line will cause data to repeat 2*n times in the display memory.
<modes 0-6), and so if there was any problem later on, then at least the
<cursor would be in the right _phyical_ position, (and would presumably
<not line up with what you are typing). If the 6845 is socketed, then try
<reseating it (pull it out and push it back in again).
Same for other chips around it.
Allison
At 10:55 AM 2/17/98 +0000, you wrote:
>> ABACUS (the Atari Bay Area Computer Users Society) still runs it's BBS on
>> an Atari 1040ST. (Though, to keep this off-topic, we're thinking of moving
>> to a linux box.)
>
> A travesty !! Or do you mean minix. The Toronto Atari Federation
>still uses FoRem on a TT. (still sucks) (The sys-op will get me for
>that ! )
Well, Most of the club members have non-Atari modems... Why stick to only
Atari when there is an alternative that will do a better job of letting us
make the most of our Atari's? I see the BBS like a modem; doesn't need to
be an Atari to host Atari discussions.
In any case, it's kind of a moot point as ABACUS now supports Mac and PC
users. We decided that the true value in the club was the members. We
knew each other, and enjoy our company, and don't want to lose that just
because some have moved on to another platform. So now we do everything.
Something to think about as an alternative to letting a good club die out.
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.sinasohn.com/
Here's a fellow looking for a good home for his MVII. Anyone?
-=-=- <snip> -=-=-
From: "Brett A. Farnam" <bfarnam(a)skantech.com>
Newsgroups: comp.sys.dec
Subject: Micro Vax II
Date: Tue, 17 Feb 1998 19:59:49 -0500
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To any one interested,
I have a MicroVax II that is nicely configured and licensced in my name.
I need to find a home for it. Any thoughts? I am willing to donate it
before it becomes trash. I have Open VMS with DEC Net, (2) RA90's, (1) TK
50, (1) TS 05 all in a standard DEC issue 48" cab.
Brett A. Farnam
-=-=-=-=-=-=-=-=-
Bruce Lane, SysOp,
The Dragon's Cave BBS (Fido 1:343/272)
kyrrin2 {at} wiz<ards> d[o]t n=e=t
"...No matter how hard we may wish otherwise, our science can only describe
an object, event, or living creature, in our own human terms. It cannot possibly
define any of them!..."
I just picked up an AppleII and 2 FDDs with a bunch of add-ons
at a local thrift store. The only Apple I have explored is my Mac+.
Anyone able to identify the cards ?
A Disk II interface card...... obvious.
Ram Module by Multiflex Tech Inc.....I imagine additional ram
Grapple+ Printer Interface......... Serial, Parallel ??
Multiflex Tech ...Long card with kludged cable to an RCA male
connector and another to a clothes-pin chip staddler labelled
AP TC/14. Two labelled chips "Firmware" and "Char. Gen." (imagine
this is a video card of some sort.)
Modem 80 card with 2 tel. jacks........... Baud-rate ?
CableTV kludge to a "SUP 'R' MOD CH.33 TV Interface Unit ??
External added-on connector 2x3 blade (like an AC outlet but with 3
pairs of smaller female recepticles in one unit) ??
It also has what I imagine is stock Ext. video (single RCA) and
cassette (2 mini-pin i/o )
Any help appreciated.
ciao larry
lwalkerN0spaM(a)interlog.com
Last fall, I bought a Model 100 which was fine, except the LCD
doesn't work. I thought I could fix it, but find I really have
no time to troubleshoot it . ..
I'm willing to resell it to anyone on this list for $10 + shipping,
send me e-mail if you're interested.
-------------------------------------------------------------------------------
Charles P. Hobbs __ __ ____ ___ ___ ____
transit(a)primenet.com /__)/__) / / / / /_ /\ / /_ /
/ / \ / / / / /__ / \/ /___ /
-------------------------------------------------------------------------------
> > 1) Check the PSU in the 11/34 CPU. It's probably fine,
> > but you don't want to ruin all your boards
>
> How should I check the power supply? I know that many people here
> say you should always do this but with the small cheap micros I've
> picked up so far I haven't bothered.
Disconnect the PSU from the backplanes. Inspect it visually to make
sure there are no obvious uprooted components, cooked tracks, etc.
Connect dummy loads between the important supply rails and ground (I
think they are +5V +15V and -15V in a PDP - Can someone confirm this?
Do you need a load on the 20V rail as well?) and switch on. Measure the
voltages across the dummy loads.
Generally the 15V rails don't need to be loaded very heavily - a
resistor of 100 ohms rated at a few watts ought to do it. You ought to
try and draw several amps from the 5V rail - a 6V car headlamp bulb is
ideal. Light bulbs make good dummy loads in any case because you can
see if there is any current there...
Beyond that, there are plenty of PDP hackers on this list who can take
up the story at this point...
Philip.
PS I too will admit to not doing this nearly often enough...
Sam Ismail <dastar(a)wco.com> wrote:
> The Lawrence Livermore National Laboratories (across the street from my
> neighborhood) auctioned off their Cray in 1993 and it was sold for $10,000
> to some oaf who said he could get lots of gold out of it and was thus very
> excited (there was a newspaper article about it). I was incensed, but oh
> well. I expect there will be similarly high bidding by the scrappers on
> this poor guy as well.
Hmm, Tony Cole? Seems he has put one on display at The Computer
Museum's History Center and is selling bits and pieces of others,
encased in Lucite as geek memorabilia. There was a story about this in
the San Jose Mercury a while back, which probably means that it's up
on their web site, hmm....
http://www.sjmercury.com/columnists/cassidy/docs/mc011898.htm
-Frank McConnell
I have a slightly wierd problem. Not sure if it is hardware or software.
Ok, I turn the 4p on with no floppy in the drive. It says:
The Floppy Disk Drive is not Ready. (in 3 languages, no less)
I put in the TRSDOS 6 system disk, the system appears to boot,
but the monitor looks like there is no sync. It is very fuzzy. I can type
in the date, and enter a command (dir :1), and the system appears to
do it.
Why does actually getting booted up cause the monitor to be unusable?
Trying other disks in the drive, if they are not system disks, causes other
messages to appear, perfectly readable.
Any ideas?
Kelly
