From 7d7e2ec8a86d562ac0e1de0fa6bcb3661323b9c1 Mon Sep 17 00:00:00 2001
From: "XTra.KrazzY" <XTra.KrazzY@gmail.com>
Date: Wed, 1 Jul 2009 18:05:54 +0000
Subject: Added the Zelda UCode preliminary synthesizer. It's far from perfect,
 but it sounds like the exact pitch it should synth. I'd be glad if someone
 finished it.

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@3630 8ced0084-cf51-0410-be5f-012b33b47a6e
---
 docs/DSP/DSP_UC_Zelda.txt | 64 +++++++++++++++++++++++++++++------------------
 1 file changed, 39 insertions(+), 25 deletions(-)

(limited to 'docs')

diff --git a/docs/DSP/DSP_UC_Zelda.txt b/docs/DSP/DSP_UC_Zelda.txt
index 1a62b2a1c4..066b6e46d2 100644
--- a/docs/DSP/DSP_UC_Zelda.txt
+++ b/docs/DSP/DSP_UC_Zelda.txt
@@ -2915,37 +2915,51 @@ void 08b2_Unk() {
 	08b2 1401      lsl         $ACC0, #1       // t = PB.RatioFrac * 2
 
 	// Set up sound buffers
-	08b3 009b c000 lri         $AX1.H, #0xc000 // a = 0xc000
-	08b5 0099 4000 lri         $AX1.L, #0x4000 // b = 0x4000
-
-	08b7 1150 08bf bloopi      #0x50, 0x08bf
-	// for(int i = 0; i < 80; i++) {
-		08b9 02c0 0001 andcf       $AC0.M, #0x0001
-		08bb 027c      iflnz       
-			08bc 1b1b      srri        @$AR0, $AX1.H
-		08bd 027d      iflz        
-			08be 1b19      srri        @$AR0, $AX1.L
-		08bf 4800      addax       $ACC0, $AX0.L
-	// }
-	08c0 147f      lsr         $ACC0, #-1
+	//08b3 009b c000 lri         $AX1.H, #0xc000
+	//08b5 0099 4000 lri         $AX1.L, #0x4000
+
+	//08b7 1150 08bf bloopi      #0x50, 0x08bf
+	for(int i = 0; i < 80; i++) {
+		//08b9 02c0 0001 andcf       $AC0.M, #0x0001
+		//08bb 027c      iflnz       
+		//	08bc 1b1b      srri        @$AR0, $AX1.H
+		//08bd 027d      iflz        
+		//	08be 1b19      srri        @$AR0, $AX1.L
+		if(($AC0.M & 1) == 1)
+			*$AR0++ = 0x4000;
+		else
+			*$AR0++ = 0xc000;
+		
+		08bf 4800      addax       $ACC0, $AX0.L // t += PB.RatioInt
+	}
+	08c0 147f      lsr         $ACC0, #-1 // t /= 2
 	08c1 02df      ret
 }
 
 void 08c2_Unk() {         
-	08c2 1402      lsl         $ACC0, #2
-	08c3 8900      clr         $ACC1
-	08c4 1fb8      mrr         $AC1.L, $AX0.L
-	08c5 1501      lsl         $ACC1, #1
+	08c2 1402      lsl         $ACC0, #2       // t = PB.RatioFrac * 4
+	08c3 8900      clr         $ACC1           // ACC1 = 0
+	08c4 1fb8      mrr         $AC1.L, $AX0.L  // AC1.L = PB.RatioInt
+	08c5 1501      lsl         $ACC1, #1       // ACC1 *= 2
 	08c6 009b c000 lri         $AX1.H, #0xc000
 	08c8 0099 4000 lri         $AX1.L, #0x4000
-	08ca 1150 08d2 bloopi      #0x50, 0x08d2
-		08cc 02c0 0003 andcf       $AC0.M, #0x0003
-		08ce 027c      iflnz       
-			08cf 1b1b      srri        @$AR0, $AX1.H
-		08d0 027d      iflz        
-			08d1 1b19      srri        @$AR0, $AX1.L
-		08d2 4c00      add         $ACC0, $AC1.L
-	08d3 147e      lsr         $ACC0, #-2
+	//08ca 1150 08d2 bloopi      #0x50, 0x08d2
+	for(int i = 0; i < 80; i++) {
+		//08cc 02c0 0003 andcf       $AC0.M, #0x0003
+		//08ce 027c      iflnz       
+		//	08cf 1b1b      srri        @$AR0, $AX1.H
+		//08d0 027d      iflz        
+		//	08d1 1b19      srri        @$AR0, $AX1.L
+		//08d2 4c00      add         $ACC0, $AC1.L
+		
+		if(($AC0.M & 3) == 3)
+			*$AR0++ = 0x4000;
+		else
+			*$AR0++ = 0xc000;
+			
+		t += (PB.RatioInt * 2);
+	}
+	08d3 147e      lsr         $ACC0, #-2 // t /= 4
 	08d4 02df      ret         
 }
 
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