[A83] Re: interrupt with rom calls
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[A83] Re: interrupt with rom calls
> I don't know what you exactly mean with 'modifies the
SP'. SP is the stack
> pointer, but you don't tell what you change about it. If
it would give
> problems if there's data getting witten to the space
below the SP, you
> won't be able to run an interrupt, as since when an
interrupt occures the
> current PC will be pushed to the stack.
In my line drawing routine, I set SP to +/- 12. (So
I can go without any memory variables in the inner
loop.) I use shadow regs as well. Why not? Well,
$000C would be an interesting place for the stack,
indeed. :)
PG
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