diff options
Diffstat (limited to 'src/music_pre.c')
| -rw-r--r-- | src/music_pre.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/music_pre.c b/src/music_pre.c index 292f0a8..4260ea1 100644 --- a/src/music_pre.c +++ b/src/music_pre.c @@ -1,6 +1,7 @@ #include "global.h" #include "gba/io_reg.h" #include "m4a.h" +#include "bg.h" extern void nullsub_19(void); extern void nullsub_20(u16 songIndex); @@ -31,8 +32,62 @@ struct unkStruct_3000FD8 extern struct unkStruct_3000FD8 gUnknown_3000FD8[8]; +extern u8 gUnknown_202D7FE; +extern u16 gUnknown_202D7FC; +extern struct BGControlStruct gUnknown_202D698; +extern struct BGControlStruct gUnknown_202D6A0; +extern struct BGControlStruct gUnknown_202D6A8; +extern struct BGControlStruct gUnknown_202D6B0; + void sub_800BF80(void); +void nullsub_17(void) +{ +} + +void UpdateBGControlRegisters(void) +{ + u32 BG[4]; + + if(gUnknown_202D7FE == 1) + { + BG[0] = 1; + BG[1] = 2; + BG[2] = 0; + BG[3] = 3; + } + else + { + BG[0] = 0; + BG[1] = 1; + BG[2] = 2; + BG[3] = 3; + } + + REG_BG0HOFS = gUnknown_202D698.hofs; + REG_BG0VOFS = gUnknown_202D698.vofs; + REG_BG1HOFS = gUnknown_202D6A0.hofs; + REG_BG1VOFS = gUnknown_202D6A0.vofs; + REG_BG2HOFS = gUnknown_202D6A8.hofs; + REG_BG2VOFS = gUnknown_202D6A8.vofs; + REG_BG3HOFS = gUnknown_202D6B0.hofs; + REG_BG3VOFS = gUnknown_202D6B0.vofs; + + REG_BG0CNT = BG[0] | 0xB0 << 6; + REG_BG1CNT = BG[1] | 0xB4 << 6; + if(gUnknown_202D6A8.unk2 == 0x80 << 8) + { + REG_BG2CNT = BG[2] | 0x2e08; + } + else + { + REG_BG2CNT = BG[2] | 0xB8 << 6; + } + + REG_BG3CNT = BG[3] | 0x2f08; + REG_BLDCNT = gUnknown_202D7FC; +} + // Some kind of initializer for music? void sub_800BD08(void) { |