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Unwind clearscreen

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This commit is contained in:
Dave Plummer 2023-10-13 11:45:55 -07:00
parent b3dad85de2
commit 2fa6d453a3
1 changed files with 16 additions and 2 deletions
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18
samples/kim1/subs.asm
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@ -206,8 +206,22 @@ _ClearScreen:
stx dest_hi
ldy #0
: sta (dest), y
iny
: sta (dest), y ; Loop unwound by a factor of 8, which means our iny before the branchh
iny ; will still work as it's on a page crossing boundary.
sta (dest), y ; This will avoid most of the overhead of the branch.
iny
sta (dest), y
iny
sta (dest), y
iny
sta (dest), y
iny
sta (dest), y
iny
sta (dest), y
iny
sta (dest), y
iny
bne :-
inc dest_hi