> >In Pitfall, for example, every color register went through something
> like
> >this:
> >
> > LDA ColorToGet
> > EOR $88
> > AND $87
> > STA ColorRegister
>
> They wasted 6 cycles for not so useful things like color cycling and
> b/w,
> and still could write a single-scanline resolution game... >:-(
>
> While we're on the subject... couldn't the b&w mode have been done in
> hardware, sending the Chroma signal of the TIA throught the switch?
>
> [Matt Pritchard] I don't think so. I believe the color cycling was
> documented in the Stella programmers guide along with the
> NTSC->PAL->SECAM color converisons.
>
>
>
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