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.
        rol
        endm

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