Applied labels and byte designators

This commit is contained in:
codemann8
2024-04-05 20:50:04 -05:00
committed by aerinon
parent 2e2b493240
commit a70251d2b2
114 changed files with 2786 additions and 2970 deletions

View File

@@ -7,60 +7,60 @@
;00 00 01 01 01 02 02 02 03 03 03 04 04 04 05 05 05 06 06 06 07 07 07 08 08
MultiplyByY:
.loop cpy #$0001 : beq .done
cpy #$0003 : bne ++
.loop cpy.w #$0001 : beq .done
cpy.w #$0003 : bne ++
jsr MultiBy3 : bra .done
++ cpy #$0005 : bne ++
++ cpy.w #$0005 : bne ++
jsr MultiBy5 : bra .done
++ asl : sta $00 : tya : lsr : tay : lda $00 : bra .loop
++ asl : sta.b Scrap00 : tya : lsr : tay : lda.b Scrap00 : bra .loop
.done rts
;Divisor in Y. Width of division is in X for rounding toward middle
DivideByY:
.loop
cpy #$0000 : beq .done
cpy #$0001 : beq .done
cpy #$0003 : bne ++
cpy.w #$0000 : beq .done
cpy.w #$0001 : beq .done
cpy.w #$0003 : bne ++
jsr DivideBy3 : bra .done
++ cpy #$0005 : bne ++
++ cpy.w #$0005 : bne ++
jsr DivideBy5 : bra .done
++ jsr DivideBy2 : sta $00
++ jsr DivideBy2 : sta.b Scrap00
tya : lsr : tay
txa : lsr : tax
lda $00 : bra .loop
lda.b Scrap00 : bra .loop
.done rts
MultiBy3:
sta $00 : asl : !add $00
sta.b Scrap00 : asl : !ADD.b Scrap00
rts
MultiBy5:
sta $00 : asl #2 : !add $00
sta.b Scrap00 : asl #2 : !ADD.b Scrap00
rts
;width of divison in x: rounds toward X/2
DivideBy2:
sta $00
sta.b Scrap00
lsr : bcc .done
sta $02 : txa : lsr : cmp $00 : !blt +
lda $02 : inc : bra .done
+ lda $02
sta.b Scrap02 : txa : lsr : cmp.b Scrap00 : !BLT +
lda.b Scrap02 : inc : bra .done
+ lda.b Scrap02
.done rts
DivideBy3:
sta $00
ldx #$0000
lda #$0002
.loop cmp $00 : !bge .store
inx : !add #$0003 : bra .loop
sta.b Scrap00
ldx.w #$0000
lda.w #$0002
.loop cmp.b Scrap00 : !BGE .store
inx : !ADD.w #$0003 : bra .loop
.store txa
rts
DivideBy5:
sta $00
ldx #$0000
lda #$0003
.loop cmp $00 : !bge .store
inx : !add #$0005 : bra .loop
sta.b Scrap00
ldx.w #$0000
lda.w #$0003
.loop cmp.b Scrap00 : !BGE .store
inx : !ADD.w #$0005 : bra .loop
.store txa
rts