by the way, I don't know if someone could explain me something.. if you see
**broken link removed**
PCB, instead of schematic, the counters 74HC393, that suppose to address the PROM, don't seem to be conected to address inputs in order. I mean, from less significant bit, it connects to A0, A3, A10, A11, ...
Isn't it supose to be A0, A1, A2, A3, .. so when increasing counter, we move onto next memory position?? this really is driving me crazy... thanks guys.