"Mark (UK)" wrote in message ...
Ethan Dicks wrote:
I tried building a circuit to dump the PROM (it's only 32x8), but I'm
reading all zeros (not sensible, since the board _does_ work).

Are you using pull up resistors on the data outputs of that PROM?
Remember the 74S188 is open collector....?

Yeah... I did figure that out after I posted my initial query.

BTW, I spelled the company name wrong, it's a "Bascon MC-1N" I'm
looking for information on.

Thanks,

-ethan