On 8/19/2012 1:24 PM, Egan Ford wrote:
determine from the 6502 if the Mill is running. After I discovered that I could not send an IRQ to the 6502, I thought of having the Mill self-reset or halt and then detecting that from the 6502, but that didn't work either.
Well, the 6502 can read 8 bits from the I/O address of the card. 2 of these bits are BA and BS from 6809, other 2 are the 6809 HALT and RESET.
I would think that makes it easy to see what the 6809 is doing. -Alex.