> Yes there is. When jeff and I were trying to get our game code to run
> on
> real hardware...it worked in MAME but not on the real hardware. As it
> turns
> out MAME does not emulate the clearing the IRQ counter. Basically MAME
> must
> just handle the ISR differently.
[...]
The counter clear is just an address decode, so to clear it you
> just "sta INTACK", where INTACK is the hex location for the counter
> clear.
> Get that in you ISR, and you're closer to being in business!
>
I'm 99% sure that my code will start working as-is when I get that in
the ISR. Thanks a lot for bringing it up though 'cause that didn't
occur to me right off the bat. It does *totally* explain the current
behavior though.
-Clay
Received on Thu Apr 15 17:25:30 1999
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