From 56fd75ab36dfd469c84b1506a271a5853fed85fa Mon Sep 17 00:00:00 2001
From: zsknight <>
Date: Wed, 27 Jun 2001 20:42:22 +0000
Subject: [PATCH] Emerald Dragon working

---
 zsnes/src/cpu/dspproc.asm | 19 ++++++++++++++++++-
 zsnes/src/init.asm        | 20 ++++++++++++++++++++
 2 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/zsnes/src/cpu/dspproc.asm b/zsnes/src/cpu/dspproc.asm
index f7eb78c6..f732e834 100644
--- a/zsnes/src/cpu/dspproc.asm
+++ b/zsnes/src/cpu/dspproc.asm
@@ -128,7 +128,7 @@ EXTSYM DSPMem
 EXTSYM InterSound
 EXTSYM NoiseData,SoundCompD,Voice0Disable,csounddisable,dssel,spcRamcmp
 EXTSYM cfgecho,Surround,SoundBufEn
-EXTSYM echobuf
+EXTSYM echobuf,ENVDisable
 EXTSYM LowPassFilter
 EXTSYM UseCubicSpline,NoiseDisTemp
 
@@ -4096,8 +4096,11 @@ WaveIndex  times 8 dd 0
     mov dword[Voice0IncNumber+%1*4],0
     mov byte [Voice0Status+%1],0
     mov byte [Voice0State+%1],0
+    cmp byte[ENVDisable],1
+    je %%noSkipStuff
     cmp byte[CNetType],20
     je %%SkipStuff
+%%noSkipStuff
     mov byte [DSPMem+08h+%1*10h],0
     mov byte [DSPMem+09h+%1*10h],0
     or byte [DSPMem+7Ch],%3
@@ -4107,8 +4110,11 @@ WaveIndex  times 8 dd 0
     mov dword[Voice0EnvInc+%1*4],0
     mov dword[Voice0IncNumber+%1*4],0
     mov byte [Voice0State+%1],0
+    cmp byte[ENVDisable],1
+    je %%noSkipStuff2
     cmp byte[CNetType],20
     je %%SkipStuff2
+%%noSkipStuff2
     mov byte [DSPMem+08h+%1*10h],0
     mov byte [DSPMem+09h+%1*10h],0
     or byte [DSPMem+7Ch],%3
@@ -4231,6 +4237,8 @@ WaveIndex  times 8 dd 0
 ;    mov [DSPMem+09h+%1*10h],ah
     mov al,[Voice0EnvInc+%1*4+2]
     mov [DSPMem+08h+%1*10h],al
+    cmp byte[ENVDisable],1
+    je %%clearenv
     cmp byte[CNetType],20
     je %%clearenv
     cmp byte[MovieProcessing],0
@@ -4253,6 +4261,8 @@ WaveIndex  times 8 dd 0
 ;    mov [DSPMem+09h+%1*10h],ah
     mov al,[Voice0EnvInc+%1*4+2]
     mov [DSPMem+08h+%1*10h],al
+    cmp byte[ENVDisable],1
+    je %%clearenvsi
     cmp byte[CNetType],20
     je %%clearenvsi
     cmp byte[MovieProcessing],0
@@ -4275,6 +4285,8 @@ WaveIndex  times 8 dd 0
 ;    mov [DSPMem+09h+%1*10h],ah
     mov al,[Voice0EnvInc+%1*4+2]
     mov [DSPMem+08h+%1*10h],al
+    cmp byte[ENVDisable],1
+    je %%clearenvi
     cmp byte[CNetType],20
     je %%clearenvi
     cmp byte[MovieProcessing],0
@@ -4297,6 +4309,8 @@ WaveIndex  times 8 dd 0
 ;    mov [DSPMem+09h+%1*10h],ah
     mov al,[Voice0EnvInc+%1*4+2]
     mov [DSPMem+08h+%1*10h],al
+    cmp byte[ENVDisable],1
+    je %%clearenv2
     cmp byte[CNetType],20
     je %%clearenv2
     cmp byte[MovieProcessing],0
@@ -4525,8 +4539,11 @@ WaveIndex  times 8 dd 0
 ;    mov [Voice0Prev1+%1*4],eax
     jmp %%Decode1Block
 %%EndSample
+    cmp byte[ENVDisable],1
+    je %%noSkipStuff4
     cmp byte[CNetType],20
     je %%SkipStuff4
+%%noSkipStuff4
     or byte [DSPMem+7Ch],%3
     mov byte [DSPMem+08h+%1*10h],0
 %%SkipStuff4
diff --git a/zsnes/src/init.asm b/zsnes/src/init.asm
index 14f4f247..a6198005 100644
--- a/zsnes/src/init.asm
+++ b/zsnes/src/init.asm
@@ -1326,6 +1326,7 @@ NEWSYM CacheCheckSkip,     db 0
 NEWSYM HIRQSkip,     db 0
 NEWSYM ClearScreenSkip, db 0
 NEWSYM hirqmode2, db 0
+NEWSYM ENVDisable, db 0
 SECTION .text
 
 ; hacks :
@@ -1428,6 +1429,18 @@ NEWSYM headerhack
     mov dword[WindowDisables],0
     mov byte[ClearScreenSkip],0
     mov byte[hirqmode2],0
+    mov byte[ENVDisable],0
+
+    mov esi,[romdata]
+    add esi,0FFC0h
+    cmp dword[esi],'EMER'
+    jne .notemeralddragon
+    cmp dword[esi+4],'ALD '
+    jne .notemeralddragon
+    cmp dword[esi+8],'DRAG'
+    jne .notemeralddragon
+    mov byte[ENVDisable],1
+.notemeralddragon
 
     mov esi,[romdata]
     add esi,7FC0h
@@ -1436,6 +1449,13 @@ NEWSYM headerhack
     mov byte[hirqmode2],1
 .notffmq
 
+;    mov byte[cycpb268],145
+;    mov byte[cycpb358],147
+;    mov byte[cycpbl2],145
+;    mov byte[cycpblt2],145
+;    mov byte[cycpbl],145
+;    mov byte[cycpblt],145
+
     mov esi,[romdata]
     add esi,0FFC0h
     cmp dword[esi],'BUBS'