ref: 8d30191707758a36b513c4368b9fdb7705730865
dir: /audio/engine_3.asm/
; The third of three duplicated sound engines. Audio3_UpdateMusic:: ; 7d177 (1f:5177) ld c, CH0 .loop ld b, $0 ld hl, wc026 add hl, bc ld a, [hl] and a jr z, .nextChannel ld a, c cp CH4 jr nc, .applyAffects ; if sfx channel ld a, [wc002] and a jr z, .applyAffects bit 7, a jr nz, .nextChannel set 7, a ld [wc002], a xor a ld [$ff25], a ld [$ff1a], a ld a, $80 ld [$ff1a], a jr .nextChannel .applyAffects call Audio3_ApplyMusicAffects .nextChannel ld a, c inc c ; inc channel number cp CH7 jr nz, .loop ret ; this routine checks flags for music effects currently applied ; to the channel and calls certain functions based on flags. ; known flags for wc02e: ; 0: toggleperfectpitch has been used ; 1: call has been used ; 3: a toggle used only by this routine for vibrato ; 4: pitchbend flag ; 6: dutycycle flag Audio3_ApplyMusicAffects: ; 7d1ac (1f:51ac) ld b, $0 ld hl, wc0b6 ; delay until next note add hl, bc ld a, [hl] cp $1 ; if delay is 1, play next note jp z, Audio3_PlayNextNote dec a ; otherwise, decrease the delay timer ld [hl], a ld a, c cp CH4 jr nc, .startChecks ; if a sfx channel ld hl, wc02a add hl, bc ld a, [hl] and a jr z, .startChecks ret .startChecks ld hl, wc02e add hl, bc bit 6, [hl] ; dutycycle jr z, .checkForExecuteMusic call Audio3_ApplyDutyCycle .checkForExecuteMusic ld b, $0 ld hl, wc036 add hl, bc bit 0, [hl] jr nz, .checkForPitchBend ld hl, wc02e add hl, bc bit 2, [hl] jr nz, .disablePitchBendVibrato .checkForPitchBend ld hl, wc02e add hl, bc bit 4, [hl] ; pitchbend jr z, .checkVibratoDelay jp Audio3_ApplyPitchBend .checkVibratoDelay ld hl, wc04e ; vibrato delay add hl, bc ld a, [hl] and a ; check if delay is over jr z, .checkForVibrato dec [hl] ; otherwise, dec delay .disablePitchBendVibrato ret .checkForVibrato ld hl, wc056 ; vibrato rate add hl, bc ld a, [hl] and a jr nz, .vibrato ret ; no vibrato .vibrato ld d, a ld hl, wc05e add hl, bc ld a, [hl] and $f and a jr z, .vibratoAlreadyDone dec [hl] ; apply vibrato pitch change ret .vibratoAlreadyDone ld a, [hl] swap [hl] or [hl] ld [hl], a ; reset the vibrato value and start again ld hl, wc066 add hl, bc ld e, [hl] ; get note pitch ld hl, wc02e add hl, bc bit 3, [hl] ; this is the only code that sets/resets bit three so jr z, .unset ; it continuously alternates which path it takes res 3, [hl] ld a, d and $f ld d, a ld a, e sub d jr nc, .noCarry ld a, $0 .noCarry jr .done .unset set 3, [hl] ld a, d and $f0 swap a add e jr nc, .done ld a, $ff .done ld d, a ld b, $3 call Audio3_7d8ac ld [hl], d ret ; this routine executes all music commands that take up no time, ; like tempo changes, duty changes etc. and doesn't return ; until the first note is reached Audio3_PlayNextNote: ; 7d244 (1f:5244) ld hl, wc06e add hl, bc ld a, [hl] ld hl, wc04e add hl, bc ld [hl], a ld hl, wc02e add hl, bc res 4, [hl] res 5, [hl] call Audio3_endchannel ret Audio3_endchannel: ; 7d25a (1f:525a) call Audio3_GetNextMusicByte ld d, a cp $ff ; is this command an endchannel? jp nz, Audio3_callchannel ; no ld b, $0 ; yes ld hl, wc02e add hl, bc bit 1, [hl] jr nz, .returnFromCall ld a, c cp CH3 jr nc, .noiseOrSfxChannel jr .asm_7d2b3 .noiseOrSfxChannel res 2, [hl] ld hl, wc036 add hl, bc res 0, [hl] cp CH6 jr nz, .notSfxChannel3 ld a, $0 ld [$ff1a], a ld a, $80 ld [$ff1a], a .notSfxChannel3 jr nz, .asm_7d296 ld a, [wc003] and a jr z, .asm_7d296 xor a ld [wc003], a jr .asm_7d2b3 .asm_7d296 jr .asm_7d2bc .returnFromCall res 1, [hl] ld d, $0 ld a, c add a ld e, a ld hl, wc006 add hl, de push hl ; store current channel address ld hl, wc016 add hl, de ld e, l ld d, h pop hl ld a, [de] ld [hli], a inc de ld a, [de] ld [hl], a ; loads channel address to return to jp Audio3_endchannel .asm_7d2b3 ld hl, Unknown_7db93 add hl, bc ld a, [$ff25] and [hl] ld [$ff25], a .asm_7d2bc ld a, [wc02a] cp $14 jr nc, .asm_7d2c5 jr .asm_7d2e2 .asm_7d2c5 ld a, [wc02a] cp $86 jr z, .asm_7d2e2 jr c, .asm_7d2d0 jr .asm_7d2e2 .asm_7d2d0 ld a, c cp CH4 jr z, .asm_7d2d9 call Audio3_7d73b ret c .asm_7d2d9 ld a, [wc005] ld [$ff24], a xor a ld [wc005], a .asm_7d2e2 ld hl, wc026 add hl, bc ld [hl], b ret Audio3_callchannel: ; 7d2e8 (1f:52e8) cp $fd ; is this command a callchannel? jp nz, Audio3_loopchannel ; no call Audio3_GetNextMusicByte ; yes push af call Audio3_GetNextMusicByte ld d, a pop af ld e, a push de ; store pointer ld d, $0 ld a, c add a ld e, a ld hl, wc006 add hl, de push hl ld hl, wc016 add hl, de ld e, l ld d, h pop hl ld a, [hli] ld [de], a inc de ld a, [hld] ld [de], a ; copy current channel address pop de ld [hl], e inc hl ld [hl], d ; overwrite current address with pointer ld b, $0 ld hl, wc02e add hl, bc set 1, [hl] ; set the call flag jp Audio3_endchannel Audio3_loopchannel: ; 7d31d (1f:531d) cp $fe ; is this command a loopchannel? jp nz, Audio3_notetype ; no call Audio3_GetNextMusicByte ; yes ld e, a and a jr z, .infiniteLoop ld b, $0 ld hl, wc0be add hl, bc ld a, [hl] cp e jr nz, .loopAgain ld a, $1 ; if no more loops to make ld [hl], a call Audio3_GetNextMusicByte ; skip pointer call Audio3_GetNextMusicByte jp Audio3_endchannel .loopAgain ; inc loop count inc a ld [hl], a ; fall through .infiniteLoop ; overwrite current address with pointer call Audio3_GetNextMusicByte push af call Audio3_GetNextMusicByte ld b, a ld d, $0 ld a, c add a ld e, a ld hl, wc006 add hl, de pop af ld [hli], a ld [hl], b jp Audio3_endchannel Audio3_notetype: ; 7d358 (1f:5358) and $f0 cp $d0 ; is this command a notetype? jp nz, Audio3_toggleperfectpitch ; no ld a, d ; yes and $f ld b, $0 ld hl, wc0c6 add hl, bc ld [hl], a ; store low nibble as speed ld a, c cp CH3 jr z, .noiseChannel ; noise channel has 0 params call Audio3_GetNextMusicByte ld d, a ld a, c cp CH2 jr z, .musicChannel3 cp CH6 jr nz, .notChannel3 ld hl, wc0e7 jr .sfxChannel3 .musicChannel3 ld hl, wc0e6 .sfxChannel3 ld a, d and $f ld [hl], a ; store low nibble of param as duty ld a, d and $30 sla a ld d, a ; fall through ; if channel 3, store high nibble as volume ; else, store volume (high nibble) and fade (low nibble) .notChannel3 ld b, $0 ld hl, wc0de add hl, bc ld [hl], d .noiseChannel jp Audio3_endchannel Audio3_toggleperfectpitch: ; 7d397 (1f:5397) ld a, d cp $e8 ; is this command a toggleperfectpitch? jr nz, Audio3_vibrato ; no ld b, $0 ; yes ld hl, wc02e add hl, bc ld a, [hl] xor $1 ld [hl], a ; flip bit 0 of wc02e jp Audio3_endchannel Audio3_vibrato: ; 7d3a9 (1f:53a9) cp $ea ; is this command a vibrato? jr nz, Audio3_pitchbend ; no call Audio3_GetNextMusicByte ; yes ld b, $0 ld hl, wc04e add hl, bc ld [hl], a ; store delay ld hl, wc06e add hl, bc ld [hl], a ; store delay call Audio3_GetNextMusicByte ld d, a and $f0 swap a ld b, $0 ld hl, wc056 add hl, bc srl a ld e, a adc b swap a or e ld [hl], a ; store rate as both high and low nibbles ld a, d and $f ld d, a ld hl, wc05e add hl, bc swap a or d ld [hl], a ; store depth as both high and low nibbles jp Audio3_endchannel Audio3_pitchbend: ; 7d3e1 (1f:53e1) cp $eb ; is this command a pitchbend? jr nz, Audio3_duty ; no call Audio3_GetNextMusicByte ; yes ld b, $0 ld hl, wc076 add hl, bc ld [hl], a ; store first param call Audio3_GetNextMusicByte ld d, a and $f0 swap a ld b, a ld a, d and $f call Audio3_7d8cc ld b, $0 ld hl, wc0a6 add hl, bc ld [hl], d ; store unknown part of second param ld hl, wc0ae add hl, bc ld [hl], e ; store unknown part of second param ld b, $0 ld hl, wc02e add hl, bc set 4, [hl] ; set pitchbend flag call Audio3_GetNextMusicByte ld d, a jp Audio3_notelength Audio3_duty: ; 7d419 (1f:5419) cp $ec ; is this command a duty? jr nz, Audio3_tempo ; no call Audio3_GetNextMusicByte ; yes rrca rrca and $c0 ld b, $0 ld hl, wc03e add hl, bc ld [hl], a ; store duty jp Audio3_endchannel Audio3_tempo: ; 7d42e (1f:542e) cp $ed ; is this command a tempo? jr nz, Audio3_stereopanning ; no ld a, c ; yes cp CH4 jr nc, .sfxChannel call Audio3_GetNextMusicByte ld [wc0e8], a ; store first param call Audio3_GetNextMusicByte ld [wc0e9], a ; store second param xor a ld [wc0ce], a ; clear RAM ld [wc0cf], a ld [wc0d0], a ld [wc0d1], a jr .musicChannelDone .sfxChannel call Audio3_GetNextMusicByte ld [wc0ea], a ; store first param call Audio3_GetNextMusicByte ld [wc0eb], a ; store second param xor a ld [wc0d2], a ; clear RAM ld [wc0d3], a ld [wc0d4], a ld [wc0d5], a .musicChannelDone jp Audio3_endchannel Audio3_stereopanning: ; 7d46e (1f:546e) cp $ee ; is this command a stereopanning? jr nz, Audio3_unknownmusic0xef ; no call Audio3_GetNextMusicByte ; yes ld [wc004], a ; store panning jp Audio3_endchannel ; this appears to never be used Audio3_unknownmusic0xef: ; 7d47b (1f:547b) cp $ef ; is this command an unknownmusic0xef? jr nz, Audio3_dutycycle ; no call Audio3_GetNextMusicByte ; yes push bc call Audio3_7d8ea pop bc ld a, [wc003] and a jr nz, .skip ld a, [wc02d] ld [wc003], a xor a ld [wc02d], a .skip jp Audio3_endchannel Audio3_dutycycle: ; 7d49a (1f:549a) cp $fc ; is this command a dutycycle? jr nz, Audio3_volume ; no call Audio3_GetNextMusicByte ; yes ld b, $0 ld hl, wc046 add hl, bc ld [hl], a ; store full cycle and $c0 ld hl, wc03e add hl, bc ld [hl], a ; store first duty ld hl, wc02e add hl, bc set 6, [hl] ; set duty flag jp Audio3_endchannel Audio3_volume: ; 7d4b8 (1f:54b8) cp $f0 ; is this command a volume? jr nz, Audio3_executemusic ; no call Audio3_GetNextMusicByte ; yes ld [$ff24], a ; store volume jp Audio3_endchannel Audio3_executemusic: ; 7d4c4 (1f:54c4) cp $f8 ; is this command an executemusic? jr nz, Audio3_octave ; no ld b, $0 ; yes ld hl, wc036 add hl, bc set 0, [hl] jp Audio3_endchannel Audio3_octave: ; 7d4d3 (1f:54d3) and $f0 cp $e0 ; is this command an octave? jr nz, Audio3_unknownsfx0x20 ; no ld hl, wc0d6 ; yes ld b, $0 add hl, bc ld a, d and $f ld [hl], a ; store low nibble as octave jp Audio3_endchannel Audio3_unknownsfx0x20: ; 7d4e6 (1f:54e6) cp $20 ; is this command an unknownsfx0x20? jr nz, Audio3_unknownsfx0x10 ; no ld a, c cp CH3 ; is this a noise or sfx channel? jr c, Audio3_unknownsfx0x10 ; no ld b, $0 ld hl, wc036 add hl, bc bit 0, [hl] jr nz, Audio3_unknownsfx0x10 ; no call Audio3_notelength ; yes ld d, a ld b, $0 ld hl, wc03e add hl, bc ld a, [hl] or d ld d, a ld b, $1 call Audio3_7d8ac ld [hl], d call Audio3_GetNextMusicByte ld d, a ld b, $2 call Audio3_7d8ac ld [hl], d call Audio3_GetNextMusicByte ld e, a ld a, c cp CH7 ld a, $0 jr z, .sfxNoiseChannel ; only two params for noise channel push de call Audio3_GetNextMusicByte pop de .sfxNoiseChannel ld d, a push de call Audio3_7d69d call Audio3_7d66c pop de call Audio3_7d6bf ret Audio3_unknownsfx0x10: ; 7d533 (1f:5533) ld a, c cp CH4 jr c, Audio3_note ; if not a sfx ld a, d cp $10 ; is this command an unknownsfx0x10? jr nz, Audio3_note ; no ld b, $0 ld hl, wc036 add hl, bc bit 0, [hl] jr nz, Audio3_note ; no call Audio3_GetNextMusicByte ; yes ld [$ff10], a jp Audio3_endchannel Audio3_note: ; 7d54f (1f:554f) ld a, c cp CH3 jr nz, Audio3_notelength ; if not noise channel ld a, d and $f0 cp $b0 ; is this command a dnote? jr z, Audio3_dnote ; yes jr nc, Audio3_notelength ; no swap a ld b, a ld a, d and $f ld d, a ld a, b push de push bc jr asm_7d571 Audio3_dnote: ; 7d569 (1f:5569) ld a, d and $f push af push bc call Audio3_GetNextMusicByte ; get dnote instrument asm_7d571 ld d, a ld a, [wc003] and a jr nz, .asm_7d57c ld a, d call Audio3_7d8ea .asm_7d57c pop bc pop de Audio3_notelength: ; 7d57e (1f:557e) ld a, d push af and $f inc a ld b, $0 ld e, a ; store note length (in 16ths) ld d, b ld hl, wc0c6 add hl, bc ld a, [hl] ld l, b call Audio3_7d8bb ld a, c cp CH4 jr nc, .sfxChannel ld a, [wc0e8] ld d, a ld a, [wc0e9] ld e, a jr .skip .sfxChannel ld d, $1 ld e, $0 cp CH7 jr z, .skip ; if noise channel call Audio3_7d707 ld a, [wc0ea] ld d, a ld a, [wc0eb] ld e, a .skip ld a, l ld b, $0 ld hl, wc0ce add hl, bc ld l, [hl] call Audio3_7d8bb ld e, l ld d, h ld hl, wc0ce add hl, bc ld [hl], e ld a, d ld hl, wc0b6 add hl, bc ld [hl], a ld hl, wc036 add hl, bc bit 0, [hl] jr nz, Audio3_notepitch ld hl, wc02e add hl, bc bit 2, [hl] jr z, Audio3_notepitch pop hl ret Audio3_notepitch: ; 7d5dc (1f:55dc) pop af and $f0 cp $c0 ; compare to rest jr nz, .notRest ld a, c cp CH4 jr nc, .sfxChannel ld hl, wc02a add hl, bc ld a, [hl] and a jr nz, .quit ; fall through .sfxChannel ld a, c cp CH2 jr z, .musicChannel3 cp CH6 jr nz, .notSfxChannel3 .musicChannel3 ld b, $0 ld hl, Unknown_7db93 add hl, bc ld a, [$ff25] and [hl] ld [$ff25], a jr .quit .notSfxChannel3 ld b, $2 call Audio3_7d8ac ld a, $8 ld [hli], a inc hl ld a, $80 ld [hl], a .quit ret .notRest swap a ld b, $0 ld hl, wc0d6 add hl, bc ld b, [hl] call Audio3_7d8cc ld b, $0 ld hl, wc02e add hl, bc bit 4, [hl] jr z, .asm_7d62c call Audio3_7d803 .asm_7d62c push de ld a, c cp CH4 jr nc, .skip ; if sfx Channel ld hl, wc02a ld d, $0 ld e, a add hl, de ld a, [hl] and a jr nz, .done jr .skip .done pop de ret .skip ld b, $0 ld hl, wc0de add hl, bc ld d, [hl] ld b, $2 call Audio3_7d8ac ld [hl], d call Audio3_7d69d call Audio3_7d66c pop de ld b, $0 ld hl, wc02e add hl, bc bit 0, [hl] ; has toggleperfectpitch been used? jr z, .skip2 inc e ; if yes, increment the pitch by 1 jr nc, .skip2 inc d .skip2 ld hl, wc066 add hl, bc ld [hl], e call Audio3_7d6bf ret Audio3_7d66c: ; 7d66c (1f:566c) ld b, $0 ld hl, Unknown_7db9b add hl, bc ld a, [$ff25] or [hl] ld d, a ld a, c cp CH7 jr z, .sfxNoiseChannel cp CH4 jr nc, .skip ; if sfx channel ld hl, wc02a add hl, bc ld a, [hl] and a jr nz, .skip .sfxNoiseChannel ld a, [wc004] ld hl, Unknown_7db9b add hl, bc and [hl] ld d, a ld a, [$ff25] ld hl, Unknown_7db93 add hl, bc and [hl] or d ld d, a .skip ld a, d ld [$ff25], a ret Audio3_7d69d: ; 7d69d (1f:569d) ld b, $0 ld hl, wc0b6 add hl, bc ld d, [hl] ld a, c cp CH2 jr z, .channel3 ; if music channel 3 cp CH6 jr z, .channel3 ; if sfx channel 3 ld a, d and $3f ld d, a ld hl, wc03e add hl, bc ld a, [hl] or d ld d, a .channel3 ld b, $1 call Audio3_7d8ac ld [hl], d ret Audio3_7d6bf: ; 7d6bf (1f:56bf) ld a, c cp CH2 jr z, .channel3 cp CH6 jr nz, .notSfxChannel3 ; fall through .channel3 push de ld de, wc0e6 cp CH2 jr z, .musicChannel3 ld de, wc0e7 .musicChannel3 ld a, [de] add a ld d, $0 ld e, a ld hl, Audio3_WavePointers add hl, de ld e, [hl] inc hl ld d, [hl] ld hl, $ff30 ld b, $f ld a, $0 ld [$ff1a], a .loop ld a, [de] inc de ld [hli], a ld a, b dec b and a jr nz, .loop ld a, $80 ld [$ff1a], a pop de .notSfxChannel3 ld a, d or $80 and $c7 ld d, a ld b, $3 call Audio3_7d8ac ld [hl], e inc hl ld [hl], d call Audio3_7d729 ret Audio3_7d707: ; 7d707 (1f:5707) call Audio3_7d759 jr nc, .asm_7d71f ld d, $0 ld a, [wc0f2] add $80 jr nc, .asm_7d716 inc d .asm_7d716 ld [wc0eb], a ld a, d ld [wc0ea], a jr .asm_7d728 .asm_7d71f xor a ld [wc0eb], a ld a, $1 ld [wc0ea], a .asm_7d728 ret Audio3_7d729: ; 7d729 (1f:5729) call Audio3_7d759 jr nc, .asm_7d73a ld a, [wc0f1] add e jr nc, .asm_7d735 inc d .asm_7d735 dec hl ld e, a ld [hl], e inc hl ld [hl], d .asm_7d73a ret Audio3_7d73b: ; 7d73b (1f:573b) call Audio3_7d759 jr nc, .asm_7d756 ld hl, wc006 ld e, c ld d, $0 sla e rl d add hl, de ld a, [hl] sub $1 ld [hl], a inc hl ld a, [hl] sbc $0 ld [hl], a scf ret .asm_7d756 scf ccf ret Audio3_7d759: ; 7d759 (1f:5759) ld a, [wc02a] cp $14 jr nc, .asm_7d762 jr .asm_7d768 .asm_7d762 cp $86 jr z, .asm_7d768 jr c, .asm_7d76b .asm_7d768 scf ccf ret .asm_7d76b scf ret Audio3_ApplyPitchBend: ; 7d76d (1f:576d) ld hl, wc02e add hl, bc bit 5, [hl] jp nz, .asm_7d7b4 ld hl, wc09e add hl, bc ld e, [hl] ld hl, wc096 add hl, bc ld d, [hl] ld hl, wc07e add hl, bc ld l, [hl] ld h, b add hl, de ld d, h ld e, l ld hl, wc08e add hl, bc push hl ld hl, wc086 add hl, bc ld a, [hl] pop hl add [hl] ld [hl], a ld a, $0 adc e ld e, a ld a, $0 adc d ld d, a ld hl, wc0a6 add hl, bc ld a, [hl] cp d jp c, .asm_7d7fa jr nz, .asm_7d7e7 ld hl, wc0ae add hl, bc ld a, [hl] cp e jp c, .asm_7d7fa jr .asm_7d7e7 .asm_7d7b4 ld hl, wc09e add hl, bc ld a, [hl] ld hl, wc096 add hl, bc ld d, [hl] ld hl, wc07e add hl, bc ld e, [hl] sub e ld e, a ld a, d sbc b ld d, a ld hl, wc086 add hl, bc ld a, [hl] add a ld [hl], a ld a, e sbc b ld e, a ld a, d sbc b ld d, a ld hl, wc0a6 add hl, bc ld a, d cp [hl] jr c, .asm_7d7fa jr nz, .asm_7d7e7 ld hl, wc0ae add hl, bc ld a, e cp [hl] jr c, .asm_7d7fa .asm_7d7e7 ld hl, wc09e add hl, bc ld [hl], e ld hl, wc096 add hl, bc ld [hl], d ld b, $3 call Audio3_7d8ac ld a, e ld [hli], a ld [hl], d ret .asm_7d7fa ld hl, wc02e add hl, bc res 4, [hl] res 5, [hl] ret Audio3_7d803: ; 7d803 (1f:5803) ld hl, wc096 add hl, bc ld [hl], d ld hl, wc09e add hl, bc ld [hl], e ld hl, wc0b6 add hl, bc ld a, [hl] ld hl, wc076 add hl, bc sub [hl] jr nc, .asm_7d81b ld a, $1 .asm_7d81b ld [hl], a ld hl, wc0ae add hl, bc ld a, e sub [hl] ld e, a ld a, d sbc b ld hl, wc0a6 add hl, bc sub [hl] jr c, .asm_7d837 ld d, a ld b, $0 ld hl, wc02e add hl, bc set 5, [hl] jr .asm_7d85a .asm_7d837 ld hl, wc096 add hl, bc ld d, [hl] ld hl, wc09e add hl, bc ld e, [hl] ld hl, wc0ae add hl, bc ld a, [hl] sub e ld e, a ld a, d sbc b ld d, a ld hl, wc0a6 add hl, bc ld a, [hl] sub d ld d, a ld b, $0 ld hl, wc02e add hl, bc res 5, [hl] .asm_7d85a ld hl, wc076 add hl, bc .asm_7d85e inc b ld a, e sub [hl] ld e, a jr nc, .asm_7d85e ld a, d and a jr z, .asm_7d86c dec a ld d, a jr .asm_7d85e .asm_7d86c ld a, e add [hl] ld d, b ld b, $0 ld hl, wc07e add hl, bc ld [hl], d ld hl, wc086 add hl, bc ld [hl], a ld hl, wc08e add hl, bc ld [hl], a ret Audio3_ApplyDutyCycle: ; 7d881 (1f:5881) ld b, $0 ld hl, wc046 add hl, bc ld a, [hl] rlca rlca ld [hl], a and $c0 ld d, a ld b, $1 call Audio3_7d8ac ld a, [hl] and $3f or d ld [hl], a ret Audio3_GetNextMusicByte: ; 7d899 (1f:5899) ld d, $0 ld a, c add a ld e, a ld hl, wc006 add hl, de ld a, [hli] ld e, a ld a, [hld] ld d, a ld a, [de] ; get next music command inc de ld [hl], e ; store address of next command inc hl ld [hl], d ret Audio3_7d8ac: ; 7d8ac (1f:58ac) ld a, c ld hl, Unknown_7db8b add l jr nc, .noCarry inc h .noCarry ld l, a ld a, [hl] add b ld l, a ld h, $ff ret Audio3_7d8bb: ; 7d8bb (1f:58bb) ld h, $0 .loop srl a jr nc, .noCarry add hl, de .noCarry sla e rl d and a jr z, .done jr .loop .done ret Audio3_7d8cc: ; 7d8cc (1f:58cc) ld h, $0 ld l, a add hl, hl ld d, h ld e, l ld hl, Audio3_Pitches add hl, de ld e, [hl] inc hl ld d, [hl] ld a, b .loop cp $7 jr z, .done sra d rr e inc a jr .loop .done ld a, $8 add d ld d, a ret Audio3_7d8ea:: ; 7d8ea (1f:58ea) ld [wc001], a cp $ff jp z, Audio3_7daa8 cp $c2 jp z, Audio3_7d9c2 jp c, Audio3_7d9c2 cp $fe jr z, .asm_7d901 jp nc, Audio3_7d9c2 .asm_7d901 xor a ld [wc000], a ld [wc003], a ld [wc0e9], a ld [wc0e6], a ld [wc0e7], a ld d, $8 ld hl, wc016 call FillAudioRAM3 ld hl, wc006 call FillAudioRAM3 ld d, $4 ld hl, wc026 call FillAudioRAM3 ld hl, wc02e call FillAudioRAM3 ld hl, wc03e call FillAudioRAM3 ld hl, wc046 call FillAudioRAM3 ld hl, wc04e call FillAudioRAM3 ld hl, wc056 call FillAudioRAM3 ld hl, wc05e call FillAudioRAM3 ld hl, wc066 call FillAudioRAM3 ld hl, wc06e call FillAudioRAM3 ld hl, wc036 call FillAudioRAM3 ld hl, wc076 call FillAudioRAM3 ld hl, wc07e call FillAudioRAM3 ld hl, wc086 call FillAudioRAM3 ld hl, wc08e call FillAudioRAM3 ld hl, wc096 call FillAudioRAM3 ld hl, wc09e call FillAudioRAM3 ld hl, wc0a6 call FillAudioRAM3 ld hl, wc0ae call FillAudioRAM3 ld a, $1 ld hl, wc0be call FillAudioRAM3 ld hl, wc0b6 call FillAudioRAM3 ld hl, wc0c6 call FillAudioRAM3 ld [wc0e8], a ld a, $ff ld [wc004], a xor a ld [$ff24], a ld a, $8 ld [$ff10], a ld a, $0 ld [$ff25], a xor a ld [$ff1a], a ld a, $80 ld [$ff1a], a ld a, $77 ld [$ff24], a jp Audio3_7db03 Audio3_7d9c2: ; 7d9c2 (1f:59c2) ld l, a ld e, a ld h, $0 ld d, h add hl, hl add hl, de ld de, SFX_Headers_3 add hl, de ld a, h ld [wc0ec], a ld a, l ld [wc0ed], a ld a, [hl] and $c0 rlca rlca ld c, a .asm_7d9db ld d, c ld a, c add a add c ld c, a ld b, $0 ld a, [wc0ec] ld h, a ld a, [wc0ed] ld l, a add hl, bc ld c, d ld a, [hl] and $f ld e, a ld d, $0 ld hl, wc026 add hl, de ld a, [hl] and a jr z, .asm_7da17 ld a, e cp $7 jr nz, .asm_7da0e ld a, [wc001] cp $14 jr nc, .asm_7da07 ret .asm_7da07 ld a, [hl] cp $14 jr z, .asm_7da17 jr c, .asm_7da17 .asm_7da0e ld a, [wc001] cp [hl] jr z, .asm_7da17 jr c, .asm_7da17 ret .asm_7da17 xor a push de ld h, d ld l, e add hl, hl ld d, h ld e, l ld hl, wc016 add hl, de ld [hli], a ld [hl], a ld hl, wc006 add hl, de ld [hli], a ld [hl], a pop de ld hl, wc026 add hl, de ld [hl], a ld hl, wc02e add hl, de ld [hl], a ld hl, wc03e add hl, de ld [hl], a ld hl, wc046 add hl, de ld [hl], a ld hl, wc04e add hl, de ld [hl], a ld hl, wc056 add hl, de ld [hl], a ld hl, wc05e add hl, de ld [hl], a ld hl, wc066 add hl, de ld [hl], a ld hl, wc06e add hl, de ld [hl], a ld hl, wc076 add hl, de ld [hl], a ld hl, wc07e add hl, de ld [hl], a ld hl, wc086 add hl, de ld [hl], a ld hl, wc08e add hl, de ld [hl], a ld hl, wc096 add hl, de ld [hl], a ld hl, wc09e add hl, de ld [hl], a ld hl, wc0a6 add hl, de ld [hl], a ld hl, wc0ae add hl, de ld [hl], a ld hl, wc036 add hl, de ld [hl], a ld a, $1 ld hl, wc0be add hl, de ld [hl], a ld hl, wc0b6 add hl, de ld [hl], a ld hl, wc0c6 add hl, de ld [hl], a ld a, e cp $4 jr nz, .asm_7da9f ld a, $8 ld [$ff10], a .asm_7da9f ld a, c and a jp z, Audio3_7db03 dec c jp .asm_7d9db Audio3_7daa8: ; 7daa8 (1f:5aa8) ld a, $80 ld [$ff26], a ld [$ff1a], a xor a ld [$ff25], a ld [$ff1c], a ld a, $8 ld [$ff10], a ld [$ff12], a ld [$ff17], a ld [$ff21], a ld a, $40 ld [$ff14], a ld [$ff19], a ld [$ff23], a ld a, $77 ld [$ff24], a xor a ld [wc000], a ld [wc003], a ld [wc002], a ld [wc0e9], a ld [wc0eb], a ld [wc0e6], a ld [wc0e7], a ld d, $a0 ld hl, wc006 call FillAudioRAM3 ld a, $1 ld d, $18 ld hl, wc0b6 call FillAudioRAM3 ld [wc0e8], a ld [wc0ea], a ld a, $ff ld [wc004], a ret ; fills d bytes at hl with a FillAudioRAM3: ; 7dafd (1f:5afd) ld b, d .loop ld [hli], a dec b jr nz, .loop ret Audio3_7db03: ; 7db03 (1f:5b03) ld a, [wc001] ld l, a ld e, a ld h, $0 ld d, h add hl, hl add hl, de ld de, SFX_Headers_3 add hl, de ld e, l ld d, h ld hl, wc006 ld a, [de] ; get channel number ld b, a rlca rlca and $3 ld c, a ld a, b and $f ld b, c inc b inc de ld c, $0 .asm_7db25 cp c jr z, .asm_7db2d inc c inc hl inc hl jr .asm_7db25 .asm_7db2d push hl push bc push af ld b, $0 ld c, a ld hl, wc026 add hl, bc ld a, [wc001] ld [hl], a pop af cp $3 jr c, .asm_7db46 ld hl, wc02e add hl, bc set 2, [hl] .asm_7db46 pop bc pop hl ld a, [de] ; get channel pointer ld [hli], a inc de ld a, [de] ld [hli], a inc de inc c dec b ld a, b and a ld a, [de] inc de jr nz, .asm_7db25 ld a, [wc001] cp $14 jr nc, .asm_7db5f jr .asm_7db89 .asm_7db5f ld a, [wc001] cp $86 jr z, .asm_7db89 jr c, .asm_7db6a jr .asm_7db89 .asm_7db6a ld hl, wc02a ld [hli], a ld [hli], a ld [hli], a ld [hl], a ld hl, wc012 ; sfx noise channel pointer ld de, Noise3_endchannel ld [hl], e inc hl ld [hl], d ; overwrite pointer to point to endchannel ld a, [wc005] and a jr nz, .asm_7db89 ld a, [$ff24] ld [wc005], a ld a, $77 ld [$ff24], a .asm_7db89 ret Noise3_endchannel: ; 7db8a (1f:5b8a) endchannel Unknown_7db8b: ; 7db8b (1f:5b8b) db $10, $15, $1A, $1F ; channels 0-3 db $10, $15, $1A, $1F ; channels 4-7 Unknown_7db93: ; 7db93 (1f:5b93) db $EE, $DD, $BB, $77 ; channels 0-3 db $EE, $DD, $BB, $77 ; channels 4-7 Unknown_7db9b: ; 7db9b (1f:5b9b) db $11, $22, $44, $88 ; channels 0-3 db $11, $22, $44, $88 ; channels 4-7 Audio3_Pitches: ; 7dba3 (1f:5ba3) dw $F82C ; C_ dw $F89D ; C# dw $F907 ; D_ dw $F96B ; D# dw $F9CA ; E_ dw $FA23 ; F_ dw $FA77 ; F# dw $FAC7 ; G_ dw $FB12 ; G# dw $FB58 ; A_ dw $FB9B ; A# dw $FBDA ; B_