Hi Eric,
> Although the 6507 doesn't have NMI or IRQ pins, it's good programming
> practice to have those vectors point somewhere, either the same as RESET or
> an RTI instruction. (And to include an SEI instruction in your
> initialization section.) That way if the 6507 flakes out it won't crash
> horribly.
If you used BRK to jump to a subroutine then I can understand using SEI. But if you just point the IRQ to RESET (which most of us do), then is it needed?
Take care,
Dennis
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