275 lines
4.1 KiB
ArmAsm
275 lines
4.1 KiB
ArmAsm
;MB_VALUE = $91
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;MB_FRAME = $94
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;MB_PATTERN = $95
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mah00 = $8000
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mah01 = $8100
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mah02 = $8200
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mah03 = $8300
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mah04 = $8400
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mah05 = $8500
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mah06 = $8600
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mah07 = $8700
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mal00 = $8800
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mal01 = $8900
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mal02 = $8A00
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mal03 = $8B00
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mal04 = $8C00
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mal05 = $8D00
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mal06 = $8E00
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mal07 = $8F00
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mbh00 = $9000
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mbh01 = $9100
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mbh02 = $9200
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mbh03 = $9300
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mbh04 = $9400
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mbh05 = $9500
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mbh06 = $9600
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mbh07 = $9700
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mbl00 = $9800
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mbl01 = $9900
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mbl02 = $9A00
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mbl03 = $9B00
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mbl04 = $9C00
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mbl05 = $9D00
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mbl06 = $9E00
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mbl07 = $9F00
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mch00 = $A000
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mch01 = $A100
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mch02 = $A200
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mch03 = $A300
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mch04 = $A400
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mch05 = $A500
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mch06 = $A600
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mch07 = $A700
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mcl00 = $A800
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mcl01 = $A900
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mcl02 = $AA00
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mcl03 = $AB00
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mcl04 = $AC00
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mcl05 = $AD00
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mcl06 = $AE00
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mcl07 = $AF00
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mnh00 = $B000
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mnh01 = $B100
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mnh02 = $B200
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mnh03 = $B300
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mnh04 = $B400
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mnh05 = $B500
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mnh06 = $B600
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mnh07 = $B700
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mnl00 = $B800
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mnl01 = $B900
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mnl02 = $BA00
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mnl03 = $BB00
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mnl04 = $BC00
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mnl05 = $BD00
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mnl06 = $BE00
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mnl07 = $BF00
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; takes
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; 7 load pattern
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; 76 smc
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; 3 loop init
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; 910 play music 80 + 82 + 88 + 80 + 82 + 88 + 80 + 82 + 88 + 80 + 80
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; 21 end
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;==========
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; = 1017
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play_music:
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mute_smc:
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; self-modify the code
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lda MB_PATTERN ; 3
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and #$07 ; 2
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tay ; 2
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lda mal_pattern,Y ; 4
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sta mb_smc1+2 ; 4
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lda mah_pattern,Y ; 4
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sta mb_smc2+2 ; 4
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sta mb_smc3+2 ; 4
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lda mbl_pattern,Y ; 4
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sta mb_smc4+2 ; 4
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lda mbh_pattern,Y ; 4
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sta mb_smc5+2 ; 4
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sta mb_smc6+2 ; 4
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; mcl and mch patterns are the same
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lda mcl_pattern,Y ; 4
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sta mb_smc7+2 ; 4
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lda mch_pattern,Y ; 4
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sta mb_smc8+2 ; 4
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sta mb_smc9+2 ; 4
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lda mnl_pattern,Y ; 4
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sta mb_smc10+2 ; 4
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lda mnh_pattern,Y ; 4
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sta mb_smc11+2 ; 4
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;=======
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; 76
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; play the code
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ldy MB_FRAME ; 3
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;=======
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; mal
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mb_smc1:
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lda mal00,Y ; 4
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sta MB_VALUE ; 3
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ldx #0 ; 2
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jsr write_ay_both ; 6+65
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;=========
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; 80
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; mah
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mb_smc2:
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lda mal00,Y ; 4
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and #$f ; 2
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sta MB_VALUE ; 3
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ldx #1 ; 2
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jsr write_ay_both ; 6+65
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;========
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; 82
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mb_smc3:
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lda mal00,Y ; 4
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lsr ; 2
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lsr ; 2
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lsr ; 2
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lsr ; 2
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sta MB_VALUE ; 3
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ldx #8 ; 2
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jsr write_ay_both ; 6+65
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;=======
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; 88
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; mbl
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mb_smc4:
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lda mbl00,Y ; 4
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sta MB_VALUE ; 3
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ldx #2 ; 2
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jsr write_ay_both ; 6+65
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;=======
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; 80
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; mbh
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mb_smc5:
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lda mbh00,Y ; 4
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and #$f ; 2
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sta MB_VALUE ; 3
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ldx #3 ; 2
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jsr write_ay_both ; 6+65
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;=======
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; 82
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mb_smc6:
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lda mbh00,Y ; 4
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lsr ; 2
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lsr ; 2
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lsr ; 2
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lsr ; 2
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sta MB_VALUE ; 3
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ldx #9 ; 2
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jsr write_ay_both ; 6+65
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;======
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; 88
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; mcl
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mb_smc7:
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lda mal00,Y ; 4
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sta MB_VALUE ; 3
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ldx #4 ; 2
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jsr write_ay_both ; 6+65
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;======
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; 80
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; mch
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mb_smc8:
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lda mal00,Y ; 4
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and #$f ; 2
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sta MB_VALUE ; 3
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ldx #5 ; 2
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jsr write_ay_both ; 6+65
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;=======
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; 82
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mb_smc9:
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lda mal00,Y ; 4
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lsr ; 2
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lsr ; 2
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lsr ; 2
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lsr ; 2
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sta MB_VALUE ; 3
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ldx #10 ; 2
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jsr write_ay_both ; 6+65
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;========
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; 88
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; mnl
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mb_smc10:
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lda mal00,Y ; 4
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sta MB_VALUE ; 3
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ldx #6 ; 2
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jsr write_ay_both ; 6+65
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;=======
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; 80
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; mnh
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mb_smc11:
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lda mnh00,Y ; 4
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sta MB_VALUE ; 3
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ldx #7 ; 2
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jsr write_ay_both ; 6+65
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;=======
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; 80
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inc MB_FRAME ; 5
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bne mb_no_change ; 3
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; -1
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inc MB_PATTERN ; 5
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jmp mb_done_change ; 3
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mb_no_change:
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lda $0 ; 3
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nop ; 2
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nop ; 2
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mb_done_change:
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; restore language card
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rts ; 6
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;=======
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; 21
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play_music_end:
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.assert >play_music = >play_music_end, error, "play_music crosses page"
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.align $100
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pattern_begin:
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; patterns 8 long
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mal_pattern:
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.byte >mal00,>mal01,>mal02,>mal03,>mal04,>mal05,>mal06,>mal07
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mah_pattern:
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.byte >mah00,>mah01,>mah02,>mah03,>mah04,>mah05,>mah06,>mah07
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mbl_pattern:
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.byte >mbl00,>mbl01,>mbl02,>mbl03,>mbl04,>mbl05,>mbl06,>mbl07
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mbh_pattern:
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.byte >mbh00,>mbh01,>mbh02,>mbh03,>mbh04,>mbh05,>mbh06,>mbh07
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mcl_pattern:
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.byte >mcl00,>mcl01,>mcl02,>mcl03,>mcl04,>mcl05,>mcl06,>mcl07
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mch_pattern:
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.byte >mch00,>mch01,>mch02,>mch03,>mch04,>mch05,>mch06,>mch07
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mnl_pattern:
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.byte >mnl00,>mnl01,>mnl02,>mnl03,>mnl04,>mnl05,>mnl06,>mnl07
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mnh_pattern:
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.byte >mnh00,>mnh01,>mnh02,>mnh03,>mnh04,>mnh05,>mnh06,>mnh07
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pattern_end:
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.assert >pattern_begin = >pattern_end, error, "pattern crosses page"
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