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optimize the volume table generation code

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Peter Ferrie 2019-06-01 01:45:48 -04:00 committed by Vince Weaver
parent 0d3427b11d
commit c1f32e8cb3
1 changed files with 3 additions and 18 deletions
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21
pt3_player/pt3_lib.s
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@ -2282,34 +2282,19 @@ vol_outer:
pha ; save HL
clc ; add HL,DE
lda z80_l
adc z80_e
sta z80_l
sta z80_e
lda z80_h
adc z80_d
sta z80_h ; carry is important
lda z80_h ; ex de,hl ; swap
pha
lda z80_l
pha
lda z80_d
sta z80_h
lda z80_e
sta z80_l
pla
sta z80_e
pla
sta z80_d
sta z80_d ; carry is important
; sbc hl,hl
lda #$ff
bcs vol_ffs
vol_zeros:
lda #0
beq vol_write
vol_ffs:
lda #$ff
vol_write:
sta z80_h
sta z80_l