Hi there!
> > >While using CLEAR_START macro, I find the following in
> > > Z26 trace log:
> > >( 0 30 9 -41) ( 3 3 1 131 101) nvbdIzc 00 2a
> > > 00 2a f008: 48 pha <-- weird (12)
> > > What is this "<-- weird (12)" comment added by Z26?
> >The Pha is strobing HMOVE at cycle 12, where the HMOVE
> >results are considered to be *weird* ;-)
> How exactly does the PHA work? The only 6502 reference I have only says it
> "pushes accumulator". Can someone please translate it?
It writes the accumulator content (0 in our case) to the stack. The stack gets decremented then. The CLEAN_START macro loop so zeros the whole first page. We're looking at the moment when HMOVE is zeroed.
> But what about the other "weird" pha instruction? Using the same logic, I
> can assume it strobes $6A. What is it there?
AFAIK, there's just HMOVE *again*. The TIA registers are mirrored in certain ranges.
Greetings,
Manuel
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