diff options
| author | XTra.KrazzY <XTra.KrazzY@gmail.com> | 2009-09-16 22:40:43 +0000 |
|---|---|---|
| committer | XTra.KrazzY <XTra.KrazzY@gmail.com> | 2009-09-16 22:40:43 +0000 |
| commit | 4edf1ea837029fa5aa254d69561daec0dd82c049 (patch) | |
| tree | edfd1051dd9987ec31679e267d5d71a76144b0ab /docs | |
| parent | 2eece4c2f47454b9b545d93fc7f5f718bfd2706a (diff) | |
Decoded the non-externalops part of 0x0007 zelda sound case
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@4287 8ced0084-cf51-0410-be5f-012b33b47a6e
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/DSP/DSP_UC_Zelda.txt | 72 |
1 files changed, 52 insertions, 20 deletions
diff --git a/docs/DSP/DSP_UC_Zelda.txt b/docs/DSP/DSP_UC_Zelda.txt index 604762b156..334fd3d126 100644 --- a/docs/DSP/DSP_UC_Zelda.txt +++ b/docs/DSP/DSP_UC_Zelda.txt @@ -3209,29 +3209,61 @@ void 0919_Decoder0x6_Constant(AR0, AX0.L) { }
void 091c_Decoder0x7_WaveTable(ACC0, AR0, AX0.L) {
- 091c 0082 0100 lri $AR2, #0x0100
- 091e 008a 003f lri $WR2, #0x003f
- 0920 0086 0000 lri $IX2, #0x0000
- 0922 1406 lsl $ACC0, #6
- 0923 8900 clr $ACC1
- 0924 1fb8 mrr $AC1.L, $AX0.L
- 0925 1505 lsl $ACC1, #5
- 0926 009b 003f lri $AX1.H, #0x003f
- 0928 009a 0000 lri $AX0.H, #0x0000
- 092a 3600 andr $AC0.M, $AX1.H
- 092b 1cde mrr $IX2, $AC0.M
- 092c 001a addarn $AR2, $IX2
- 092d 3400 andr $AC0.M, $AX0.H
- 092e 1150 0934 bloopi #0x50, 0x0934
+ // So AR2 is where it reads the data from, and it updates ACC0 to the final read address in the end
+ // Questions: What is IX2 used for? And how does the wrap register change the data access?
+
+ // 091c 0082 0100 lri $AR2, #0x0100
+ // 091e 008a 003f lri $WR2, #0x003f
+ // 0920 0086 0000 lri $IX2, #0x0000
+ // 0922 1406 lsl $ACC0, #6
+ // 0923 8900 clr $ACC1
+ // 0924 1fb8 mrr $AC1.L, $AX0.L
+ // 0925 1505 lsl $ACC1, #5
+
+
+ WR2 = 0x003f;
+ ACC0 <<= 6;
+ ACC1 = AX0.L << 5;
+
+
+ // 0926 009b 003f lri $AX1.H, #0x003f
+ // 0928 009a 0000 lri $AX0.H, #0x0000
+ // 092a 3600 andr $AC0.M, $AX1.H
+ // 092b 1cde mrr $IX2, $AC0.M
+ // 092c 001a addarn $AR2, $IX2
+ // 092d 3400 andr $AC0.M, $AX0.H
+
+ AC0.M &= 0x003f;
+ IX2 = AC0.M;
+ AR2 += 0x0100 + IX2;
+
+ AC0.M = 0;
+
+
+ // 092e 1150 0934 bloopi #0x50, 0x0934
+ for(int i = 0; i < 0x50; i++) {
0930 4c4a add'l $ACC0, $ACC1 : $AX1.L, @$AR2
0931 3606 andr'dr $AC0.M, $AX1.H : $AR2
- 0932 1cde mrr $IX2, $AC0.M
+
+ // 0932 1cde mrr $IX2, $AC0.M
+ IX2 = AC0.M;
+
0933 340e andr'nr $AC0.M, $AX0.H : $AR2
- 0934 1b19 srri @$AR0, $AX1.L
- 0935 1fc2 mrr $AC0.M, $AR2
- 0936 147a lsr $ACC0, #-6
- 0937 008a ffff lri $WR2, #0xffff
- 0939 02df ret
+
+ // 0934 1b19 srri @$AR0, $AX1.L
+ *AR0++ = AX1.L
+
+ }
+
+ // 0935 1fc2 mrr $AC0.M, $AR2
+ // 0936 147a lsr $ACC0, #-6
+ // 0937 008a ffff lri $WR2, #0xffff
+
+ AC0.M = AR2;
+ ACC0 >>= 6;
+ WR2 = 0xffff;
+
+ // 0939 02df ret
}
void 093a_Unk() {
|