From 61046ac147270cd1bf9315341ec93ae08da4520a Mon Sep 17 00:00:00 2001
From: n-a-c-h <>
Date: Sun, 15 May 2005 13:24:19 +0000
Subject: [PATCH] Pause for rewind and state load now work correctly.

---
 zsnes/src/cpu/execute.asm | 40 ++++++++++++++++++++++++++++++---------
 zsnes/src/zstate.c        | 27 +++++++++++++-------------
 2 files changed, 44 insertions(+), 23 deletions(-)

diff --git a/zsnes/src/cpu/execute.asm b/zsnes/src/cpu/execute.asm
index 920c58bd..219b10a9 100644
--- a/zsnes/src/cpu/execute.asm
+++ b/zsnes/src/cpu/execute.asm
@@ -56,7 +56,7 @@ EXTSYM MovieSeekBehind,SaveSramData,BackupCVFrame,RestoreCVFrame,loadstate
 EXTSYM KeyInsrtChap,KeyNextChap,KeyPrevChap,MovieInsertChapter,MovieSeekAhead
 EXTSYM ResetDuringMovie,EMUPauseKey,INCRFrameKey,MovieWaiting,NoInputRead
 EXTSYM AllocatedRewindStates,SlowDownLock,FastForwardLock
-EXTSYM PauseFrameMode,RestorePauseFrame
+EXTSYM PauseFrameMode,RestorePauseFrame,BackupPauseFrame
 
 %ifdef __MSDOS__
 EXTSYM dssel
@@ -98,6 +98,13 @@ NEWSYM ProcessRewind
     call RestoreCVFrame
     popad
 
+    cmp byte[PauseFrameMode],1
+    jne .notpauserewind
+    pushad
+    call BackupPauseFrame
+    popad
+.notpauserewind
+    
     mov esi,[tempesi]
     mov edi,[tempedi]
     mov ebp,[tempebp]
@@ -1426,12 +1433,16 @@ NEWSYM cpuover
 .noinputread
 
     ;Pause and Frame increment
-    cmp byte[PauseFrameMode],2
-    jne .nopauseframemode2
+    cmp byte[PauseFrameMode],3
+    jne .nopauseframemode3
     pushad
     call RestorePauseFrame
     popad
-.nopauseframemode2
+    mov esi,[tempesi]
+    mov edi,[tempedi]
+    mov ebp,[tempebp]
+    mov edx,[tempedx]
+.nopauseframemode3
     
     cmp byte[EMUPause],1
     jne .noemupause
@@ -1439,14 +1450,25 @@ NEWSYM cpuover
     ; prevents some random desyncs
     mov byte[SlowDownLock],0 
     mov byte[FastForwardLock],0
-    
-    call ProcessRewind
-        
+
     cmp byte[PauseFrameMode],1
     jne .nopauseframemode1
-    mov byte[PauseFrameMode],2
-    jmp .noprocmovie
+    mov [tempedx],edx
+    mov [tempesi],esi
+    mov [tempedi],edi
+    mov [tempebp],ebp    
+    pushad
+    call BackupPauseFrame
+    popad
 .nopauseframemode1
+        
+    call ProcessRewind
+        
+    cmp byte[PauseFrameMode],2
+    jne .nopauseframemode2
+    mov byte[PauseFrameMode],3
+    jmp .noprocmovie
+.nopauseframemode2
 
     cmp byte[INCRFrame],1
     jne .noframeincr
diff --git a/zsnes/src/zstate.c b/zsnes/src/zstate.c
index c7c9de6f..660c2aa2 100755
--- a/zsnes/src/zstate.c
+++ b/zsnes/src/zstate.c
@@ -225,8 +225,9 @@ unsigned char *SpecialPauseBackup = 0, PauseFrameMode = 0;
 Pause frame modes
 
 0 - no pause frame stored
-1 - pause frame stored
-2 - pause frame ready for reload
+1 - pause frame ready to be stored
+2 - pause frame stored
+3 - pause frame ready for reload
 */
 
 void *doMemAlloc(size_t);
@@ -234,7 +235,7 @@ void *doMemAlloc(size_t);
 void BackupPauseFrame()
 {
   copy_state_data(SpecialPauseBackup, memcpyinc, csm_save_rewind);
-  PauseFrameMode = 1;
+  PauseFrameMode = 2;
 }
 
 void RestorePauseFrame()
@@ -295,16 +296,14 @@ void RestoreCVFrame()
       zmv_rewind_load(LatestRewindPos, true);
     }
 
-    EMUPause = PauseRewind;
+    if (PauseRewind)
+    {
+      PauseFrameMode = EMUPause = true;
+    }  
   }
 
   copy_state_data(RewindBufferPos, memcpyrinc, csm_load_rewind);
 
-  if (EMUPause)
-  {
-    BackupPauseFrame();
-  }  
-  
   ClearCacheCheck();
   
   RewindTimer = ActualRewindFrames;
@@ -859,10 +858,10 @@ void stateloader (unsigned char *statename, unsigned char keycheck, unsigned cha
         Msgptr = "RR STATE LOADED.";
         MessageOn = MsgCount;
 
-        if ((EMUPause = PauseLoad)) //Yes this if supposed to have a single equal
+        if (PauseRewind)
         {
-          BackupPauseFrame();
-        }
+          PauseFrameMode = EMUPause = true;
+        }  
       }
       return;
     case 2:
@@ -885,9 +884,9 @@ void stateloader (unsigned char *statename, unsigned char keycheck, unsigned cha
     {
       Msgptr = txtloadmsg; // 'STATE X LOADED.'
       
-      if ((EMUPause = PauseLoad)) //Yes this if supposed to have a single equal
+      if (PauseRewind)
       {
-        BackupPauseFrame();
+        PauseFrameMode = EMUPause = true;
       }
     }
     else