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Define first_music_cmd

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This replaces the uses of $d0 in the audio engine with proper constants.
This commit is contained in:
mid-kid 2018-11-21 12:12:22 +01:00
parent 4e3ed078f9
commit 725cee7371
3 changed files with 7 additions and 6 deletions
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6
audio/engine.asm
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@ -1136,9 +1136,9 @@ ReadNoiseSample:
ParseMusic:
; parses until a note is read or the song is ended
call GetMusicByte ; store next byte in a
cp endchannel_cmd ; is the song over?
cp endchannel_cmd
jr z, .endchannel
cp $d0 ; is it a note?
cp first_music_cmd
jr c, .readnote
; then it's a command
.readcommand
@ -1350,7 +1350,7 @@ ParseMusicCommand:
; reload command
ld a, [wCurMusicByte]
; get command #
sub $d0 ; first command
sub first_music_cmd
ld e, a
ld d, 0
; seek command pointer

2
constants/audio_constants.asm
View File

@ -24,11 +24,11 @@
const CHAN3 ; 2
const CHAN4 ; 3
NUM_MUSIC_CHANS EQU const_value
NUM_NOISE_CHANS EQU const_value
const CHAN5 ; 4
const CHAN6 ; 5
const CHAN7 ; 6
const CHAN8 ; 7
NUM_NOISE_CHANS EQU const_value - NUM_MUSIC_CHANS
NUM_CHANNELS EQU const_value
; channel_struct members (see macros/wram.asm)

5
macros/scripts/audio.asm
View File

@ -21,12 +21,13 @@ ENDM
; MusicCommands indexes (see audio/engine.asm)
enum_start $d8
first_music_cmd EQU __enum__ + -8
enum notetype_cmd ; $d8
octave: MACRO
db notetype_cmd - (\1)
db first_music_cmd + 8 - (\1)
ENDM
enum notetype_cmd ; $d8
notetype: MACRO
db notetype_cmd
db \1 ; note_length