31 lines
493 B
ArmAsm
31 lines
493 B
ArmAsm
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tracker_init:
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; create Frequency Table
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ldx #11
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make_freq_loop:
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sec
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lda frequency_lookup_low,X
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ror
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sta frequency_lookup_low+16,X
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lsr
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sta frequency_lookup_low+32,X
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lsr
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sta frequency_lookup_low+48,X
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dex
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bpl make_freq_loop
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inx
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stx frequency_lookup_low+28
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; setup initial ay-3-8910 values (this depends on song)
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lda #$38
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sta AY_REGS+7 ; $07 mixer (ABC on)
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lda #$0E
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sta AY_REGS+8 ; $08 volume A
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lda #$0C
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sta AY_REGS+9 ; $09 volume B
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sta AY_REGS+10 ; $0A volume C
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