on 8/08/00 9:25, Tom Zerucha at [EMAIL PROTECTED] wrote:
> Or Movem.l which moves lotsa bytes for 4 bytes of instructions.
Thanks to all for your answers. Yes I have the 68k cycles chart (back to the
Atari ST, I was already doing that kind of optimization) but I did not catch
on the fact that there is no built-in instruction cache in the dragonball.
The original 68k cache was very small but at least there was one.
About misaligned copies, yes the 68k core will generate an exception but
there is an old trick for that kind of copies: it's called MOVEP. Was
originally designed for talking to hardware registers of on-board
processors, but can be used for graphics copies as well.
Cheers,
Florent.
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