add a hack for fixing game sessions that were carelessly initialized with the wrong save size. it may or may not work in any given case, depending on how the game works

src/mc.cpp

@@ -78,6 +78,12 @@ static const int save_types[7][2] = {
 		{MC_TYPE_FLASH,MC_SIZE_4MBITS}
 };
 
+//forces the current 
+void backup_forceManualBackupType()
+{
+	MMU_new.backupDevice.forceManualBackupType();
+}
+
 void backup_setManualBackupType(int type)
 {
 	CommonSettings.manualBackupType = type;
@@ -818,3 +824,9 @@ bool BackupDevice::load_movie(std::istream* is) {
 
 	return true;
 }
+
+void BackupDevice::forceManualBackupType()
+{
+	addr_size = addr_size_for_old_save_size(save_types[CommonSettings.manualBackupType][1]);
+	state = RUNNING;
+}

src/mc.h

@@ -75,6 +75,8 @@ public:
 
 	void reset();
 	void close_rom();
+	
+	void forceManualBackupType();
 
 	bool save_state(std::ostream* os);
 	bool load_state(std::istream* is);
@@ -142,6 +144,7 @@ void fw_reset_com(memory_chip_t *mc);       /* reset communication with mc */
 u8 fw_transfer(memory_chip_t *mc, u8 data);
 
 void backup_setManualBackupType(int type);
+void backup_forceManualBackupType();
 
 #endif /*__FW_H__*/
 

src/windows/main.cpp

@@ -3451,6 +3451,7 @@ LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM
 		case IDC_SAVETYPE5: backup_setManualBackupType(4); return 0; 
 		case IDC_SAVETYPE6: backup_setManualBackupType(5); return 0; 
 		case IDC_SAVETYPE7: backup_setManualBackupType(6); return 0; 
+		case IDC_SAVETYPE_FORCE: backup_forceManualBackupType(); return 0; 
 
 		case IDM_RESET:
 			ResetGame();

src/windows/resource.h

@@ -77,6 +77,7 @@
 #define IDC_SAVETYPE4                   185
 #define IDC_SAVETYPE5                   186
 #define IDC_SAVETYPE6                   187
+#define IDC_SAVETYPE_FORCE              188
 #define IDC_FRAMESKIPAUTO               190
 #define IDC_FRAMESKIP0                  191
 #define IDC_FRAMESKIP1                  192