12 Dec
2002
12 Dec
'02
6:34 a.m.
At 08:09 AM 12/12/02 GMT, Peter Turnbull wrote:
>
> >From the model number on your machine, I would assume it's a B, but I am
> not sure.
It does appear to be a B. It has two rows of (mumble)16 memory chips so it has 32k of
RAM.
I don't need to add much to what Tony has said, except to confirm that what
you have is indeed (from the model number) a USA Model B. Other (minor)
differences are things like it accepts American spellings for BASIC
keywords ("color" vs "colour"),
That makes sense. I noticed that the ROM containing BASIC is labeled "US
BASIC".
What is "DFS OS"?
I was surprised to find that it uses an intel 8271 for floppy drive controller.
It powered up up but isn't recognizing any keys except the BREAK key. I ran it for
over an hour then one of the rectangular tantalum filter caps in the PSU blew. Fixing the
PSU shouldn't be a problem. Does anyone know what they use for a keyboard interface
(if it even uses one)? or if there's any schematics posted anywhere for it?
Joe