The other day I picked up a Commodore 128D. [Along with a Timex
Sinclaire 1000 with some sort of module hanging off of it that I'm not
sure about, Also a Commodore 1541 Floppy all for $25 at a Pawn Shop)
Anyhow, I plugged in the C128 and I get only a black screen. I checked
the fuses and notice one had been blown. I replaced it and still only
had a black screen and a newly blown fuse. I'm going to do some checks
on the power supply to see if I can fix the fuse blowing and hopefully
the black screen.
I also have picked up an Atari 520ST with the external floppy drive - no
power supplies or cables. My thinking is that I can always build those
if I need to. What all of this is leading to is - Does anyone know of
any good resources for pinouts, schematics, etc on the old PC's? Also,
does the black screen on the C128D ring any bells for anyone?
Thanks!
Mike
So what's new?
-----Original Message-----
From: Daniel A. Seagraves <DSEAGRAV(a)toad.xkl.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, March 27, 1998 2:25 PM
Subject: More Proof that Intel is Backwards.
>God, I hate Intel...
>Playing with PDP-11 assembly. Did x86 assemble before.
>
>X86 move: MOV Destination,Soure
>Everything else move: MOV Source, Destination
>
>Just spent 20 minutes trying to find out why "MOV SP,#1600"
>caused a stackfault every time... (SP goes negative on a push, as 1600/ 0)
>
>Intel is Backwards...
>-------
God, I hate Intel...
Playing with PDP-11 assembly. Did x86 assemble before.
X86 move: MOV Destination,Soure
Everything else move: MOV Source, Destination
Just spent 20 minutes trying to find out why "MOV SP,#1600"
caused a stackfault every time... (SP goes negative on a push, as 1600/ 0)
Intel is Backwards...
-------
Ithica Audio, some pretty neat systems. I used to call on them as an
apps engineer back in 1980. I wouldn't mind finding one or at least the
floppy controller as I had some influence in the design.
<> I also found a National Semiconductor Board Level Computer (BLC). It's
<> 8080A single-board computer from 1977. There's also an unpopulated RO
<> board in the small card cage. I know zilch about this one. There are
<> plenty of unconnected edge-connectors on the CPU board and an on-board
<> 8251, so I assume I can make this one fly if I simply figure out the I/
<> connections and power requirements.
IF it has two edge connectors it's multibus and it was made a few years
later as National was not in the multibus market till 79-81ish.
Allison
Hello,
I'm enjoying the demographics thread for Mar '98. Followed for some
time.
None of the collections seem to mention a Sinclair ZX-80. I had/have
the 4k ROM version, then upgraded to the 8k ROM. "The Monitor Exposed"
(I forget the excellent author's name) was and is my kernel in computer
science, which is how I now make a modest living.
Timex came out with a Sinclair-based machine, too. The Timex 1000, I
think. It had more RAM. Both had an expansion port for RAM They ran
on a Z80 MPU (Thanks to Rodney Zak! I know my Z80 stuff).
There was a magazine called Sync. It had a "alternative" look to the
cover.
My collection is based on computers with which I've had person
experiences. So far, I'm missing some Apples (which shouldn't be hard
to find if I get to cities) and a PDP-11/70, which I probably couldn't
get to work if I had one.
--J. Lynn Hogg
jhogg(a)bigfoot.com
To implement the "slow" mode, the ZX81 has the NMI line connected to
something or other. I have one Timex 1000 and a ZX81, the difference
being 1k (1k in the ZX81, 2k in the Timex) but of course, everyone "has"
to have one of the wobbly 16k packs!
For those interested, you can roll your own ZX80, thanks to the lack of
custom chips! (That's right - Z80, RAM, ROM, and a handfull of TTL
chips...) Schematics and ROM images (also for ZX81) are at
http://www.babytalk.demon.co.uk/zx80/zx80.html
--------------------------------------------
Joachim Thiemann
DSP Coder, Castleton Network Systems
I doubt therefore I might be.
> -----Original Message-----
> From: John Ruschmeyer [SMTP:jruschme@exit109.com]
> Sent: March 26, 1998 22:52 PM
> To: Discussion re-collecting of classic computers
> Subject: Re: ZX-81 Re: Sinclair ZX-80
>
> > Hi Lynn,
> >
> > Timex 1000s are EASY to find! I've passed up dozens of them at
> yard
> > sales. I have four that I ended up with for one reason or another.
> BTW
> > I found a ZX-81 the other day. Is anyone familar with it? What's
> the
> > difference between it and a ZX-80?
>
> The ZX-81 is basically a ZX-80 with an enhanced ROM and some extra
> circuitry
> which let it display while computing (SLOW mode).
>
> The TS-1000 is a ZX-81 with 2K of RAM instead of 1K.
>
> <<<John>>>
SyQuest?
> -----Original Message-----
> From: Joe [SMTP:rigdonj@intellistar.net]
> Sent: Thursday, March 26, 1998 10:28 AM
> To: Discussion re-collecting of classic computers
> Subject: What is this? AST 88 Mb drive
>
> I picked up an external drive in a bunch of computer parts. Can anyone
> identify it? It looks like a Bernoulli or Syquest drive but is marked "AST
> Technologies" and "88 MB C". It's the same size as a Bernoulli
> Transportable drive and the cartridge looks like it is *almost* the same
> size as a Bernoulli 90 Mb (but it's not!) It has two 50 pin SCSI
> connectors
> on the back along with a socket for a power cord and two AC outlets. It
> included a SCSI cable that has a male DB-25 connctor on the other end.
> What kind of cartridge does this take? Is it worth bothering with?
>
> Joe
I picked up an external drive in a bunch of computer parts. Can anyone
identify it? It looks like a Bernoulli or Syquest drive but is marked "AST
Technologies" and "88 MB C". It's the same size as a Bernoulli
Transportable drive and the cartridge looks like it is *almost* the same
size as a Bernoulli 90 Mb (but it's not!) It has two 50 pin SCSI connectors
on the back along with a socket for a power cord and two AC outlets. It
included a SCSI cable that has a male DB-25 connctor on the other end.
What kind of cartridge does this take? Is it worth bothering with?
Joe
Received this message... Hope someone can help him out...
>From: "Joe's Second e-mail" <kainjb(a)mysolution.com>
>Subject: For Sale
>
>While cleaning up my basement I found my Atari 800 with three memory
cards, Bit 3 80 column card, original documentation, a game cartridge,
BASIC cartridge, several joysticks, and a new floppy drive that was never
plugged in (Bought a MAC). I did notice that the space bar was cracked, but
it does work :-)
>
>I would like to sell it all off. Please pass this message to any
interested party.
>
>Thank you in advance.
>
>Joe Kain
>219-436-9966
>219-459-1120 Fax
>kainjb(a)mysolution.com
>
>
--------------------------------------------------------------------- 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 bought this thing with all packaging and manuals. It's called the
AccuCard, and is made by Emerson UPS. It fits into an 8-bit ISA slot,
and goes between the power supply and motherboard in terms of power.
If the power supply should turn off, the thing will keep the mother
board on. It claims to save something to disk, but I don't know how
it keeps the drives on. I don't think my power cable will reach, but
I will try to install it, and report back.
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