mirror of
https://github.com/thornAvery/kep-hack.git
synced 2025-09-17 02:40:50 +12:00
421 lines
6.6 KiB
NASM
421 lines
6.6 KiB
NASM
bigdw: MACRO ; big-endian word
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dw ((\1)/$100) + (((\1)&$ff)*$100)
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ENDM
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dt: MACRO ; three-byte (big-endian)
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db (\1 >> 16) & $ff
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db (\1 >> 8) & $ff
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db \1 & $ff
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ENDM
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inc_section: MACRO
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SECTION \1, ROMX
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include \1 ; "" ; trick scan_includes to ignore
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ENDM
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maskbits: MACRO
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; masks just enough bits to cover the first argument
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; the second argument is an optional shift amount
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; e.g. "maskbits 26" becomes "and %00011111" (since 26 - 1 = %00011001)
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; and "maskbits 3, 2" becomes "and %00001100" (since "maskbits 3" becomes %00000011)
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; example usage in rejection sampling:
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; .loop
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; call Random
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; maskbits 26
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; cp 26
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; jr nc, .loop
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x = 1
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rept 8
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if x + 1 < (\1)
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x = x << 1 | 1
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endc
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endr
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if _NARG == 2
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and x << (\2)
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else
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and x
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endc
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ENDM
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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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channel_count: MACRO
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assert 0 < (\1) && (\1) <= NUM_MUSIC_CHANS, \
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"channel_count must be 1-{d:NUM_MUSIC_CHANS}"
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_num_channels = \1 - 1
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ENDM
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channel: MACRO
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assert 0 < (\1) && (\1) <= NUM_CHANNELS, \
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"channel id must be 1-{d:NUM_CHANNELS}"
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dn (_num_channels << 2), \1 - 1 ; channel id
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dw \2 ; address
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_num_channels = 0
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ENDM
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note: MACRO
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dn (\1), (\2) - 1 ; pitch, length
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ENDM
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drum_note: MACRO
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note \1, \2 ; drum instrument, length
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ENDM
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rest: MACRO
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note 0, \1 ; length
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ENDM
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square_note: MACRO
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db \1 ; length
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IF \3 < 0
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dn \2, %1000 | (\3 * -1) ; volume envelope
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ELSE
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dn \2, \3 ; volume envelope
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ENDC
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dw \4 ; frequency
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ENDM
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noise_note: MACRO
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db \1 ; length
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IF \3 < 0
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dn \2, %1000 | (\3 * -1) ; volume envelope
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ELSE
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dn \2, \3 ; volume envelope
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ENDC
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db \4 ; frequency
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ENDM
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; MusicCommands indexes (see audio/engine.asm)
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const_def $d0
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FIRST_MUSIC_CMD EQU const_value
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const octave_cmd ; $d0
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octave: MACRO
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assert 1 <= (\1) && (\1) <= 8, "octave must be 1-8"
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db octave_cmd | 8 - (\1) ; octave
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ENDM
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const_skip 7 ; all octave values
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const note_type_cmd ; $d8
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note_type: MACRO
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db note_type_cmd
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db \1 ; note length
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IF _NARG >= 2
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IF \3 < 0
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dn \2, %1000 | (\3 * -1) ; volume envelope
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ELSE
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dn \2, \3 ; volume envelope
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ENDC
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ENDC
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ENDM
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; only valid on the noise channel
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drum_speed: MACRO
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note_type \1 ; note length
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ENDM
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const transpose_cmd ; $d9
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transpose: MACRO
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db transpose_cmd
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dn \1, \2 ; num octaves, num pitches
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ENDM
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const tempo_cmd ; $da
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tempo: MACRO
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db tempo_cmd
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bigdw \1 ; tempo
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ENDM
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const duty_cycle_cmd ; $db
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duty_cycle: MACRO
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db duty_cycle_cmd
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db \1 ; duty cycle
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ENDM
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const volume_envelope_cmd ; $dc
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volume_envelope: MACRO
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db volume_envelope_cmd
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IF \2 < 0
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dn \1, %1000 | (\2 * -1) ; volume envelope
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ELSE
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dn \1, \2 ; volume envelope
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ENDC
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ENDM
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const pitch_sweep_cmd ; $dd
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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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dn \1, %1000 | (\2 * -1) ; pitch sweep
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ELSE
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dn \1, \2 ; pitch sweep
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ENDC
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ENDM
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const duty_cycle_pattern_cmd ; $de
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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 << 0) ; duty cycle pattern
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ENDM
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const toggle_sfx_cmd ; $df
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toggle_sfx: MACRO
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db toggle_sfx_cmd
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ENDM
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execute_music EQUS "toggle_sfx"
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const pitch_slide_cmd ; $e0
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pitch_slide: MACRO
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db pitch_slide_cmd
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db \1 - 1 ; duration
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dn 8 - \2, \3 % 12 ; octave, pitch
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ENDM
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const vibrato_cmd ; $e1
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vibrato: MACRO
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db vibrato_cmd
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db \1 ; delay
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IF _NARG > 2
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dn \2, \3 ; extent, rate
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ELSE
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db \2 ; LEGACY: Support for 1-arg extent
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ENDC
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ENDM
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const unknownmusic0xe2_cmd ; $e2
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unknownmusic0xe2: MACRO
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db unknownmusic0xe2_cmd
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db \1 ; unknown
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ENDM
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const toggle_noise_cmd ; $e3
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toggle_noise: MACRO
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db toggle_noise_cmd
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IF _NARG > 0
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db \1 ; drum kit
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ENDC
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ENDM
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const force_stereo_panning_cmd ; $e4
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force_stereo_panning: MACRO
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db force_stereo_panning_cmd
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dn %1111 * (1 && \1), %1111 * (1 && \2) ; left enable, right enable
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ENDM
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const volume_cmd ; $e5
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volume: MACRO
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db volume_cmd
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IF _NARG > 1
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dn \1, \2 ; left volume, right volume
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ELSE
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db \1 ; LEGACY: Support for 1-arg volume
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ENDC
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ENDM
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const pitch_offset_cmd ; $e6
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pitch_offset: MACRO
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db pitch_offset_cmd
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bigdw \1 ; pitch offset
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ENDM
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const unknownmusic0xe7_cmd ; $e7
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unknownmusic0xe7: MACRO
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db unknownmusic0xe7_cmd
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db \1 ; unknown
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ENDM
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const unknownmusic0xe8_cmd ; $e8
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unknownmusic0xe8: MACRO
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db unknownmusic0xe8_cmd
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db \1 ; unknown
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ENDM
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const tempo_relative_cmd ; $e9
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tempo_relative: MACRO
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db tempo_relative_cmd
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bigdw \1 ; tempo adjustment
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ENDM
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const restart_channel_cmd ; $ea
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restart_channel: MACRO
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db restart_channel_cmd
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dw \1 ; address
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ENDM
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const new_song_cmd ; $eb
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new_song: MACRO
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db new_song_cmd
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bigdw \1 ; id
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ENDM
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const sfx_priority_on_cmd ; $ec
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sfx_priority_on: MACRO
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db sfx_priority_on_cmd
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ENDM
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const sfx_priority_off_cmd ; $ed
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sfx_priority_off: MACRO
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db sfx_priority_off_cmd
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ENDM
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const unknownmusic0xee_cmd ; $ee
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unknownmusic0xee: MACRO
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db unknownmusic0xee_cmd
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dw \1 ; address
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ENDM
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const stereo_panning_cmd ; $ef
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stereo_panning: MACRO
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db stereo_panning_cmd
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dn %1111 * (1 && \1), %1111 * (1 && \2) ; left enable, right enable
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ENDM
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const sfx_toggle_noise_cmd ; $f0
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sfx_toggle_noise: MACRO
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db sfx_toggle_noise_cmd
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IF _NARG > 0
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db \1 ; drum kit
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ENDC
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ENDM
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const music0xf1_cmd ; $f1
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music0xf1: MACRO
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db music0xf1_cmd
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ENDM
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const music0xf2_cmd ; $f2
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music0xf2: MACRO
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db music0xf2_cmd
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ENDM
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const music0xf3_cmd ; $f3
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music0xf3: MACRO
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db music0xf3_cmd
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ENDM
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const music0xf4_cmd ; $f4
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music0xf4: MACRO
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db music0xf4_cmd
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ENDM
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const music0xf5_cmd ; $f5
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music0xf5: MACRO
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db music0xf5_cmd
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ENDM
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const music0xf6_cmd ; $f6
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music0xf6: MACRO
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db music0xf6_cmd
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ENDM
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const music0xf7_cmd ; $f7
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music0xf7: MACRO
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db music0xf7_cmd
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ENDM
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const music0xf8_cmd ; $f8
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music0xf8: MACRO
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db music0xf8_cmd
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ENDM
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const unknownmusic0xf9_cmd ; $f9
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unknownmusic0xf9: MACRO
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db unknownmusic0xf9_cmd
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ENDM
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const set_condition_cmd ; $fa
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set_condition: MACRO
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db set_condition_cmd
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db \1 ; condition
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ENDM
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const sound_jump_if_cmd ; $fb
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sound_jump_if: MACRO
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db sound_jump_if_cmd
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db \1 ; condition
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dw \2 ; address
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ENDM
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const sound_jump_cmd ; $fc
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sound_jump: MACRO
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db sound_jump_cmd
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dw \1 ; address
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ENDM
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const sound_loop_cmd ; $fd
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sound_loop: MACRO
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db sound_loop_cmd
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db \1 ; count
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dw \2 ; address
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ENDM
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const sound_call_cmd ; $fe
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sound_call: MACRO
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db sound_call_cmd
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dw \1 ; address
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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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; custom commands:
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load_wave: MACRO
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db $f3
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IF _NARG > 16
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REPT 16
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dn \1, \2
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SHIFT
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SHIFT
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ENDR
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ELSE
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REPT 16
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db \1
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SHIFT
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ENDR
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ENDC
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ENDM
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inc_octave: MACRO
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db $f4
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ENDM
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dec_octave: MACRO
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db $f5
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ENDM
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notetype0: MACRO
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db $f6, \1
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ENDM
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notetype1: MACRO
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db $f7, \1
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ENDM
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notetype2: MACRO
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db $f8, \1
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ENDM
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; not reimplemented yet
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toggle_perfect_pitch: MACRO
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ENDM
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