Posted By
Luca
on 2022-01-25
10:40:17
 |  Re: Who Dares Wins II +4M [PAL/NTSC]
@Mad: yes, that's been my very first approach, with the $FF06 table looking like:
$3C,$3D,$3D,$3E,$3F,$38,$39,$3A
$3C,$3D,$3D,$3E,$3F,$38,$39,$3A
...
in order to seek all the badlines.
If I precalculate in the non-video scantime the value to be loaded, even having:
lda #$xx
ldx #$xx
ldy #$xx
sta $ff1a
stx $ff1b
sty $ff1f
steals away 18 cycles, growing up to AS MINIMUM 24 changing $ff06 at any scanline...
Unfortunaltey, I've never had success...but it's only the beginning, I'm gonna crash my head into it 
Some synching, you mean in order to intercept the first visible line (#$03), of course yes.
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