71 lines
1.1 KiB
ArmAsm
71 lines
1.1 KiB
ArmAsm
; FIXME: replace with updated version from music/redbook_sound
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; the notes here aren't exactly right
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; based on code from here
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; http://eightbitsoundandfury.ld8.org/programming.html
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; A,X,Y trashed
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; duration also trashed
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NOTE_C3 = 255
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NOTE_CSHARP3 = 241
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NOTE_D3 = 227
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NOTE_DSHARP3 = 214
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NOTE_E3 = 202
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NOTE_F3 = 191
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NOTE_FSHARP3 = 180
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NOTE_G3 = 170
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NOTE_GSHARP3 = 161
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NOTE_A3 = 152
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NOTE_ASHARP3 = 143
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NOTE_B3 = 135
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NOTE_C4 = 128
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NOTE_CSHARP4 = 121
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NOTE_D4 = 114
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NOTE_DSHARP4 = 108
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NOTE_E4 = 102
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NOTE_F4 = 96
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NOTE_FSHARP4 = 91
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NOTE_G4 = 85
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NOTE_GSHARP4 = 81
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NOTE_A4 = 76
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NOTE_ASHARP4 = 72
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NOTE_B4 = 68
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NOTE_C5 = 64
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NOTE_CSHARP5 = 60
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NOTE_D5 = 57
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NOTE_DSHARP5 = 54
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NOTE_E5 = 51
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NOTE_F5 = 48
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NOTE_FSHARP5 = 45
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NOTE_G5 = 43
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NOTE_GSHARP5 = 40
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NOTE_A5 = 38
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NOTE_ASHARP5 = 36
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NOTE_B5 = 34
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speaker_tone:
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lda $C030 ; click speaker
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speaker_loop:
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dey ; y never set?
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bne slabel1 ; duration roughly 256*?
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dec speaker_duration ; (Duration)
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beq done_tone
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slabel1:
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dex
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bne speaker_loop
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ldx speaker_frequency ; (Frequency)
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jmp speaker_tone
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done_tone:
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rts
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speaker_duration:
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.byte $00
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speaker_frequency:
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.byte $00
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