>
>I was wondering if there's a surefire way of telling if an IBM-PC has its
>original motherboard, without opening the case. I saw one at the
>Salvation Army today and was considering dragging it home (though I
>decided to take another machine instead).
>
>The machine did have a cassette port in the back, with a femal DIN
>connector. Is this attached to the motherboard?
Yes it is. So it sounds like it's original.
There were 2 motherboards, a 16-64k and a 64-256k. The former was the
original one. The latter has a B in a circle stamped on the back plate.
On 25 Jun 98 at 23:22, Zane H. Healy wrote:
> Wow, it has the complete OS in ROM? I didn't know any of the Mac's did
> that. Are there any others or was this a one shot experiment that failed?
> The OS in ROM is the main thing I like about the Atari ST's.
ISTR that Apple were looking at a diskless Mac project -- the sort
of thing that would interest education. The Classic was available as
a hard diskless model according to the manual but I've never seen
one. Of course the diskless idea would never have worked very well
as there was nowhere to install extensions/INITs and the diskless
Classic was stuck on System 6.0.x and there was no ethernet
capability.
(An aside: Sonic Systems later developed The Diskless Mac (TDM) which
used a boot PROM on an ethernet card to attach to an AppleShare
server where a System image was stored. This worked with System 7 but
the hardware range was limited.)
Phil
**************************************************************
Phil Beesley -- Computer Officer -- Distributed Systems Suppport
University of Leicester
Tel (0)116 252-2231
E-Mail pb14(a)le.ac.uk
I have made contact with an individual who has
what he describes as an Altair 8800 which is
in an "Attache" case made by Icom in 1976. Would
appreciate any information about this "Attache".
Is it a very desirable thing. Were very many produced, etc?
It has MITS
boards (CPU, IO, disk controller) and power suppy.
He wants to trade it to me for an Imsai 8800.
Would that be a good trade on my part?
Thanks,
Bob
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
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I've been looking around this list for what must be years!
Thomas Pfaff
thomas100(a)home.com
Trs-80 Model 4 lover
At 07:44 PM 6/18/98 -0700, Bruce Lane wrote:
> Where did you get the idea that tape is so fragile? I'd wager the ones you
>encountered were either of very poor quality or were stored under adverse
>conditions (high heat, high humidity, etc).
A side note: I've got VHS tapes that are 10-12 years old and still look the
same when played. I find that most tapes fail with heavy use, not age
deterioration.
-
- john higginbotham ____________________________
- webmaster www.pntprinting.com -
- limbo limbo.netpath.net -
Megan Gentry wrote:
> >BTW - another question -- when the Mac Classic boots, it shows the
> >smiley disk and I hear the internal HD working. The screen goes >light
> grey with a pointer on it. This is displayed for a few seconds >and
> then I get the 'Welcome to Macintosh' screen. This remains this >way
> for as much as 10 minutes (I didn't wait longer). Is this >normal?
The Mac Classic contains a complete System 6 installation in ROM that
you can boot from. Sorry but I don't have the docs handy, but I think
if you press Command-Option-Shift-X on startup, it'll boot from the
ROM. Another way that should work is Command-Option-Shift-Backspace --
this key combination should work on any SCSI capable Mac to supress
booting from the default SCSI boot device.
Once you've booted, you'll need to scrounge a copy of Disk First Aid
or a third party utility to check the hard disk. Do you have system
install disks etc for the machine?
Phil
**************************************************************
Phil Beesley -- Computer Officer -- Distributed Systems Suppport
University of Leicester
Tel (0)116 252-2231
E-Mail pb14(a)le.ac.uk
>>> It can't be as bad as the Science Museum in London, surely. I was there
>>> earlier this week, and what a _joke_!!!
>> I never been there - hmm maybe I should tak a weekend - is
>> there a Website to get the opening hours ?
> Well, IMHO, it's worth the admission charge (\pounds 6.50 (!)) if you're
> interested in things other than classic computers. But it's not worth it
> for the computers alone.
> I've been interested in clocks for about 25 years or more, so seeing a
> Synchronome working (even if the description wasn't that good) was worth
> it. Ditto for a lot of the other clocks (going back many centuries) -
> most of them are ticking away...
> Alas they've added some of those 'interactive' experiments. While a good
> idea in theory, I'm not sure they should be combined with collections of
> historical scientific instruments, etc. The groups of people interested
> in the two displays would have virtually no intersection IMHO.
Hmm. The Deutsches Museum is a 'hands-on'/'interactive') museum
since the first years, and the combination of historic displays
and learning works fine - at least for me.
>> Ok, the 2002 wouldn't be exactly the machine for continous
>> display in action, but even if it is just as static display,
> No, but fire it up from time to time to show it in operation. Even just 1
> or 2 days a year. Announce the days in advance and the hackers can come
> along and see a real machine in operation
>> this one time running test ist the best verification that the
>> static display is _complete_.
>> (In fact, the critical part of the 2002 is the storage drum -
>> even back in time when it was new, every power up and down
>> had to be guarded by tecnicans - hmm but even here, since
>> the drum is a closed device, one could replace it (invisible)
>> by a modern electronic emulation... just thinking)
> Oh, back the heads off the drum and replace it with a set of RAMs and
> counters :-). Keep the drum turning, and demonstrate the machine with
> more modern memory (at least for day-to-day operation).
Exactly my idea of a display ...
Gruss
H.
--
Ich denke, also bin ich, also gut
HRK
Aha, y'all thought I was being cute with the subject... 8^)
I re-watched BttF II the other night, and noticed that in the window of the
shop where Marty buys the sports almanac was an interesting item, an
"antique computer". (A mac Plus-ish machine.) I'm not sure exactly what
year II came out (about '87-88?) but that was pretty insightful, I think.
('Course, they were pretty cool movies anyway.)
--------------------------------------------------------------------- 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/
I HAVE SEVERAL COMPUTER AUTOMATION ALPHA-16 MINICOMPUTERS... THEY HAVE
CORE MEMORY AND NO PARTICULAR MICRO-PROC CHIP BUT A WHOLE BOARD OF CHIPS
FOR THAT FUNCTION... THESE ARE 16 BIT COPUTERS MADE IN THE EARLY
70'S... ANYONE INTERESTED??? I ALSO HAVE SOME 8" FLOPPIES...
LAAG(a)PACBELL.NET
Heads up for Lisa owners. Saw this on Obsolete Comps.
DO NOT E-MAIL ME. CONTACT THE ADDRESSEE BELOW !
Michael Getsey <getsey(a)ix.netcom.com>
St. Louis, MO USA - Wednesday, June 24, 1998 at 03:24:39
Have three 5.25 inch, double sided, double density disks for Apple III PC.
I used these for a COBOL class I had at The Citadel. Disks are Apple III
E-Z Pieces Boot Disc, Compiler, and Utilities. I believe I was using them
on an Apple Lisa at the time ( 1983 ).
They're free for the asking. Send me your "snail mail" address, and they're
yours!
lwalker(a)interlog.com
