robjustice
robjustice
I have updated that, thanks. That would be nice to set the clock. I'm assuming its stored in 6801's Internal ram as well. Must be some sort of flag generated...
I had a try with this disk image. the first time it booted up ok. Then I did a few more and its gives me inconsistent behavior. works sometimes, and...
I did a decode of the PAL and see the SYNCLATCH is an output that goes to the PIA PB0, maybe its looking for this somehow to sync up? Equations:...
My understanding of the logic is that it will clock the value of D0 into SYNCLATCH only when IOSTR is low. When IOSTR is high, the clock input will be...
I think your right Colin, it seems to creep time between the VBL and the 6805 generated interrupt. I tried to work this out a bit, please correct me if...
I'm not to sure what all that is doing as well. I tracked the timer values through that part that adjusts the last counter run and think its 2 cycles...