mirror of
https://github.com/thornAvery/kep-hack.git
synced 2025-09-16 18:30:50 +12:00
395 lines
6.4 KiB
NASM
395 lines
6.4 KiB
NASM
MACRO bigdw ; big-endian word
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db HIGH(\1), LOW(\1)
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ENDM
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MACRO inc_section
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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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MACRO maskbits
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; masks just enough bits to cover values 0 to \1 - 1
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; \2 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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assert 0 < (\1) && (\1) <= $100, "bitmask must be 8-bit"
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DEF x = 1
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rept 8
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if x + 1 < (\1)
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DEF 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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MACRO channel_count
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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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DEF _num_channels = \1 - 1
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ENDM
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MACRO channel
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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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DEF _num_channels = 0
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ENDM
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MACRO note
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dn (\1), (\2) - 1 ; pitch, length
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ENDM
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MACRO drum_note
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note \1, \2 ; drum instrument, length
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ENDM
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MACRO rest
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note 0, \1 ; length
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ENDM
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MACRO square_note
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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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MACRO noise_note
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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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DEF FIRST_MUSIC_CMD EQU const_value
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const octave_cmd ; $d0
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MACRO octave
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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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MACRO note_type
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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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MACRO drum_speed
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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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MACRO transpose
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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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MACRO tempo
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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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MACRO duty_cycle
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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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MACRO volume_envelope
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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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MACRO pitch_sweep
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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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MACRO duty_cycle_pattern
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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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MACRO toggle_sfx
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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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MACRO pitch_slide
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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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MACRO vibrato
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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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MACRO unknownmusic0xe2
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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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MACRO toggle_noise
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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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MACRO force_stereo_panning
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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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MACRO volume
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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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MACRO pitch_offset
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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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toggle_perfect_pitch EQUS "pitch_offset 1"
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const unknownmusic0xe7_cmd ; $e7
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MACRO unknownmusic0xe7
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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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MACRO unknownmusic0xe8
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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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MACRO tempo_relative
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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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MACRO restart_channel
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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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MACRO new_song
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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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MACRO sfx_priority_on
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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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MACRO sfx_priority_off
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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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MACRO unknownmusic0xee
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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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MACRO stereo_panning
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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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MACRO sfx_toggle_noise
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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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MACRO music0xf1
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db music0xf1_cmd
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ENDM
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const music0xf2_cmd ; $f2
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MACRO music0xf2
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db music0xf2_cmd
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ENDM
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const music0xf3_cmd ; $f3
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MACRO music0xf3
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db music0xf3_cmd
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ENDM
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const music0xf4_cmd ; $f4
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MACRO music0xf4
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db music0xf4_cmd
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ENDM
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const music0xf5_cmd ; $f5
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MACRO music0xf5
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db music0xf5_cmd
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ENDM
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const music0xf6_cmd ; $f6
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MACRO music0xf6
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db music0xf6_cmd
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ENDM
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const music0xf7_cmd ; $f7
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MACRO music0xf7
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db music0xf7_cmd
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ENDM
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const music0xf8_cmd ; $f8
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MACRO music0xf8
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db music0xf8_cmd
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ENDM
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const unknownmusic0xf9_cmd ; $f9
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MACRO unknownmusic0xf9
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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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MACRO set_condition
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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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MACRO sound_jump_if
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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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MACRO sound_jump
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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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MACRO sound_loop
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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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MACRO sound_call
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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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MACRO sound_ret
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db sound_ret_cmd
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ENDM
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; custom commands:
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MACRO load_wave
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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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MACRO inc_octave
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db $f4
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ENDM
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MACRO dec_octave
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db $f5
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ENDM
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MACRO speed
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db $f6, \1
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ENDM
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MACRO channel_volume
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db $f7, \1
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ENDM
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MACRO fade_wave
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db $f8, \1
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ENDM
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