26 Mar
1998
26 Mar
'98
4:24 a.m.
On Thu, 26 Mar 1998, Allison J Parent wrote:
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.
Both the floppy and floppy controller are from Micropolis in my box.
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.
The NS BLC has a 1977 coyright on the PCB. From the component side: P1 is
the bottom left-most 86-pin (2-sided 43) connector and is plugged into the
backplane. Both boards also have an unconnected 60-pin P2 on the bottom
right.
The CPU board also has 50-pin J1, 50-pin J2, and 26-pin J3 on the top of
the card, presumably for I/O connections. It's a single-layer, two-sided
board, so I should be able to trace the pins. Some of the chips are even
labeled with their I/O address, so if I get it to come up, I might even be
able to program the thing.
-- Doug