Sunday, July 22, 2007

Speed up!!

Well, thanks to a quick bit of spotting by TNT, Its down to around 11 seconds for 64k! Around 3 scanlines a byte - well cool... Thats actually usable as it is I'd say! And although it will slow down a bit (due to saving the output to the correct place, sector selction etc...) Thats still bloody good. Anyway, heres the brainwave TNT got...

GETBIT3 macro
stx port ; Clock pulse
sty port ;
cpy port ; if Databit is 0, then Carry clear, else set.

Very cool indeed...Branchless, and 4 cycles per bit quicker... I NEVER would have spotted that one!!

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