On Mon, 22 Mar 1999, Tony Duell wrote:
There's an
"AMI S2350P", and an "AMI S1062P", and an "AM9517A-4PC", an
Got it!
The 2350 is a USRT. And it just happens to be one that was used in some
hard sectored disk controllers - like the H17 card I have schematics of
here...
It does sound like it's expecting hard sectored disks. The chip could be
used for a synchronous serial port (of course), but I think that's unlikely.
OK. That's cool! I've never owned a machine that needed hard sectored
disks before. How exotic! ;)
Maybe next month I'll drag home something with an 8" drive. :)
I don't recognise the 1062, the 9517 is (IIRC) a
DMA controller.
Cool.
"SY2128-1", a "FERRANTI ZN 1066E", three PIO chips, two CTC chips, a
Z80,
The 2128 is (IIRC) a smallish RAM (2K*8), possibly video memory
The 2128 is quite close to the 4650, so you're probably right.
I don't recognise the ZN1066 number, but I can try
to look it up.
I'm sure it has nothing to do with the floppy drives. Actually, I think
it was on the power supply board(!) so I'm not sure why I mentioned it. :)
and a Hitachi
HD46505SP. Oh, and three ROMs or EPROMs.
4650 is a CRT controller IIRC.
Yes, in case it was dead I pulled another 4650 off a PC video card and
tried it out, but there was no change.
-tony
--
Doug Spence
ds_spenc(a)alcor.concordia.ca
http://alcor.concordia.ca/~ds_spenc/