Erik Mooney wrote:
> > So, what can be done with these spare 13 cycles? :)
>
> Color changes come immediately to mind.
>
> This isn't practical for anything but a demo or Supercharger, though -
> that much RAM isn't worth sacrificing for color changes or paddle-reading
> on lines containing the big sprite.
57 bytes out of 128? :) I've never written a full game
for the A2600, but I'm sure that some games could get
by with the remaining 71... a few bytes could be saved
by saving the stack pointer externally to the routine,
I think... and normally 12 bytes are taken up by the
zero page pointers - that's integrated into the self
modifying code, so we're left with "only" 45 bytes
above a regular 6 digit display.
Maybe some of the extra cycles could support some extra
jumps back into and out of ROM, for the non-selfmod
code, so we'd save RAM space, and still have a net gain
in cycles free? I'll have to try that, and get this
thing moving left and right :)
Anyway, yes, it'd be impractical for some games, but not
all, I think.
--
Robin Harbron <macbeth@xxxxxxxxxxx>
http://www.tbaytel.net/macbeth
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