> > >Has anyone ever tried using some of the unused data bits in the TIA
> > >registers for general purpose RAM storage?
> >
> >Never tried, but it's most likely impossible, since all of the TIA
> >registers are write-only; the same addresses always access totally
> >different registers for reads and writes.
I am almost positive that it is impossible. It takes a reasonable amout
of additional hardware to make those registers read/write.
> What happens when you try to read values from $0E to $2C? These are unused
> in the Read table.
Unknown. I'd give it a 50/50% chance that it either mirrors the other
read registers, or gives you 'nothing'(nothing is never nothing, and isn't
really 'random' either, but it is unknown.). I don't know how we would
find this out besides trial and error.
Mark
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