[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

ZFDC TIL31 DISP9 code meanings

All —

I finished building the ZFDC and I have a question about the codes on the displays. Part of the test procedure says that you should see “3” in the right-most digit. Then, you replace the test ROM with the firmware and the two left digits should count to FF and roll-over (they do) but the remaining three should all have “0”. On mine, the last digit still shows “3”.

What does this mean? I still have to get the test program running and to pull an 8” drive from the attic, but I’m wondering if this is significant in some way.



Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator