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Transactor
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Transactor_05_1985_Transactor_Publishing.d64
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bit twiddlers
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Commodore BASIC
|
2023-02-26
|
719b
|
39 lines
0 rem bit twiddlers (sept 4/84) :
1 :
2 rem 3 statements, 0 functions
3 :
4 rem keyword characters: 12
5 :
6 rem keyword routine line ser #
7 rem s/set bse 2698 009
8 rem s/clear bclr 2708 010
9 rem s/flip fli 2720 011
10 :
11 rem u/bprep (2730/012)
12 :
13 rem ================================
14 :
103 .asc "se[212]clea[210]fli[208]"
1103 .word bse-1,bclr-1,fli-1
2698 bse jsr bprep
2700 ora ($14),y
2702 sta ($14),y
2704 rts
2706 ;
2708 bclr jsr bprep
2710 eor #$ff
2712 and ($14),y
2714 sta ($14),y
2716 rts
2718 ;
2720 fli jsr bprep
2722 eor ($14),y
2724 sta ($14),y
2726 rts
2728 ;
2730 bprep jsr $b7eb
2732 txa
2734 ldy #0
2736 rts
2738 ;