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https://github.com/pret/pokered.git
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233 lines
5.1 KiB
NASM
Executable file
233 lines
5.1 KiB
NASM
Executable file
audio_header: MACRO
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db (_NARG - 2) << 6 | \2
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dw \1_\2
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IF _NARG > 2
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db \3
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dw \1_\3
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ENDC
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IF _NARG > 3
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db \4
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dw \1_\4
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ENDC
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IF _NARG > 4
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db \5
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dw \1_\5
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ENDC
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ENDM
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const_def $10
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; arguments: length [0, 7], pitch change [-7, 7]
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; length: length of time between pitch shifts
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; sometimes used with a value >7 in which case the MSB is ignored
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; pitch change: positive value means increase in pitch, negative value means decrease in pitch
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; small magnitude means quick change, large magnitude means slow change
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; in signed magnitude representation, so a value of 8 is the same as (negative) 0
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const pitch_sweep_cmd ; $10
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pitch_sweep: MACRO
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db pitch_sweep_cmd
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IF \2 < 0
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db (\1 << 4) | (%1000 | (\2 * -1))
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ELSE
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db (\1 << 4) | \2
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ENDC
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ENDM
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const_next $20
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const sfx_note_cmd ; $20
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; arguments: length [0, 15], volume [0, 15], fade [-7, 7], frequency
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; fade: positive value means decrease in volume, negative value means increase in volume
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; small magnitude means quick change, large magnitude means slow change
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; in signed magnitude representation, so a value of 8 is the same as (negative) 0
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square_note_cmd EQU sfx_note_cmd ; $20
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square_note: MACRO
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db square_note_cmd | \1
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IF \3 < 0
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db (\2 << 4) | (%1000 | (\3 * -1))
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ELSE
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db (\2 << 4) | \3
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ENDC
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dw \4
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ENDM
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; arguments: length [0, 15], volume [0, 15], fade [-7, 7], frequency
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; fade: positive value means decrease in volume, negative value means increase in volume
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; small magnitude means quick change, large magnitude means slow change
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; in signed magnitude representation, so a value of 8 is the same as (negative) 0
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noise_note_cmd EQU sfx_note_cmd ; $20
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noise_note: MACRO
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db noise_note_cmd | \1
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IF \3 < 0
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db (\2 << 4) | (%1000 | (\3 * -1))
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ELSE
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db (\2 << 4) | \3
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ENDC
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db \4
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ENDM
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; arguments: pitch, length [1, 16]
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note: MACRO
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db (\1 << 4) | (\2 - 1)
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ENDM
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const_next $b0
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; arguments: instrument [1, 19], length [1, 16]
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const drum_note_cmd ; $b0
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drum_note: MACRO
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db drum_note_cmd | (\2 - 1)
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db \1
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ENDM
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; arguments: instrument, length [1, 16]
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; like drum_note but one 1 byte instead of 2
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; can only be used with instruments 1-10, excluding 2
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; unused
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drum_note_short: MACRO
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db (\1 << 4) | (\2 - 1)
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ENDM
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const_next $c0
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; arguments: length [1, 16]
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const rest_cmd ; $c0
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rest: MACRO
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db rest_cmd | (\1 - 1)
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ENDM
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const_next $d0
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; arguments: speed [0, 15], volume [0, 15], fade [-7, 7]
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; fade: positive value means decrease in volume, negative value means increase in volume
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; small magnitude means quick change, large magnitude means slow change
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; in signed magnitude representation, so a value of 8 is the same as (negative) 0
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const note_type_cmd ; $d0
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note_type: MACRO
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db note_type_cmd | \1
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IF \3 < 0
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db (\2 << 4) | (%1000 | (\3 * -1))
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ELSE
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db (\2 << 4) | \3
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ENDC
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ENDM
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; arguments: speed [0, 15]
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drum_speed_cmd EQU note_type_cmd ; $d0
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drum_speed: MACRO
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db drum_speed_cmd | \1
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ENDM
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const_next $e0
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; arguments: octave [1, 8]
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const octave_cmd ; $e0
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octave: MACRO
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db octave_cmd | (8 - \1)
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ENDM
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const_next $e8
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; when enabled, effective frequency used is incremented by 1
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const toggle_perfect_pitch_cmd ; $e8
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toggle_perfect_pitch: MACRO
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db toggle_perfect_pitch_cmd
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ENDM
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const_skip ; $e9
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; arguments: delay [0, 255], depth [0, 15], rate [0, 15]
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; delay: time delay until vibrato effect begins
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; depth: amplitude of vibrato wave
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; rate: frequency of vibrato wave
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const vibrato_cmd ; $ea
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vibrato: MACRO
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db vibrato_cmd
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db \1
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db (\2 << 4) | \3
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ENDM
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; arguments: length [1, 256], octave [1, 8], pitch
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const pitch_slide_cmd ; $eb
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pitch_slide: MACRO
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db pitch_slide_cmd
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db \1 - 1
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db ((8 - \2) << 4) | \3
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ENDM
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; arguments: duty cycle [0, 3] (12.5%, 25%, 50%, 75%)
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const duty_cycle_cmd ; $ec
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duty_cycle: MACRO
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db duty_cycle_cmd
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db \1
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ENDM
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; arguments: tempo [0, $ffff]
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; used to calculate note delay counters
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; so a smaller value means music plays faster
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; ideally should be set to $100 or less to guarantee no overflow
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; if larger than $100, large note speed or note length values might cause overflow
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; stored in big endian
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const tempo_cmd ; $ed
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tempo: MACRO
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db tempo_cmd
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db HIGH(\1), LOW(\1)
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ENDM
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; arguments: left output enable mask, right output enable mask
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const stereo_panning_cmd ; $ee
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stereo_panning: MACRO
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db stereo_panning_cmd
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db (\1 << 4) | \2
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ENDM
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const unknownmusic0xef_cmd ; $ef
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unknownmusic0xef: MACRO
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db unknownmusic0xef_cmd
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db \1
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ENDM
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; arguments: left master volume [0, 7], right master volume [0, 7]
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const volume_cmd ; $f0
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volume: MACRO
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db volume_cmd
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db (\1 << 4) | \2
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ENDM
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const_next $f8
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; when enabled, the sfx data is interpreted as music data
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const execute_music_cmd ; $f8
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execute_music: MACRO
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db execute_music_cmd
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ENDM
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const_next $fc
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; arguments: duty cycle 1, duty cycle 2, duty cycle 3, duty cycle 4
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const duty_cycle_pattern_cmd ; $fc
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duty_cycle_pattern: MACRO
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db duty_cycle_pattern_cmd
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db \1 << 6 | \2 << 4 | \3 << 2 | \4
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ENDM
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; arguments: address
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const sound_call_cmd ; $fd
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sound_call: MACRO
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db sound_call_cmd
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dw \1
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ENDM
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; arguments: count, address
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const sound_loop_cmd ; $fe
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sound_loop: MACRO
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db sound_loop_cmd
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db \1
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dw \2
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ENDM
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const sound_ret_cmd ; $ff
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sound_ret: MACRO
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db sound_ret_cmd
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ENDM
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