mappers updated to 0.98.16

[fceu.git] / boards / 8157.c

diff --git a/boards/8157.c b/boards/8157.c
index 3c4a4fb..2aa3f4e 100644 (file)
--- a/boards/8157.c
+++ b/boards/8157.c
@@ -1,77 +1,80 @@
-/* FCE Ultra - NES/Famicom Emulator\r
- *\r
- * Copyright notice for this file:\r
- *  Copyright (C) 2005 CaH4e3\r
- *\r
- * This program is free software; you can redistribute it and/or modify\r
- * it under the terms of the GNU General Public License as published by\r
- * the Free Software Foundation; either version 2 of the License, or\r
- * (at your option) any later version.\r
- *\r
- * This program is distributed in the hope that it will be useful,\r
- * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
- * GNU General Public License for more details.\r
- *\r
- * You should have received a copy of the GNU General Public License\r
- * along with this program; if not, write to the Free Software\r
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA\r
- */\r
-\r
-#include "mapinc.h"\r
-\r
-static uint16 cmdreg;\r
-static SFORMAT StateRegs[]=\r
-{\r
-  {&cmdreg, 2, "CMDREG"},\r
-  {0}\r
-};\r
-\r
-static void Sync(void)\r
-{\r
-  setprg16r((cmdreg&0x060)>>5,0x8000,(cmdreg&0x01C)>>2);\r
-  setprg16r((cmdreg&0x060)>>5,0xC000,(cmdreg&0x200)?(~0):0);\r
-  setmirror(((cmdreg&2)>>1)^1);\r
-}\r
-\r
-static DECLFR(UNL8157Read)\r
-{\r
-  if(cmdreg&0x100)\r
-    return 0xFF;\r
-  else\r
-    return CartBR(A);\r
-}\r
-\r
-static DECLFW(UNL8157Write)\r
-{\r
-  cmdreg=A;\r
-  Sync();\r
-}\r
-\r
-static void UNL8157Power(void)\r
-{\r
-  setchr8(0);\r
-  SetWriteHandler(0x8000,0xFFFF,UNL8157Write);\r
-  SetReadHandler(0x8000,0xFFFF,UNL8157Read);\r
-  cmdreg=0;\r
-  Sync();\r
-}\r
-\r
-static void UNL8157Reset(void)\r
-{\r
-  cmdreg=0;\r
-  Sync();\r
-}\r
-\r
-static void UNL8157Restore(int version)\r
-{\r
-  Sync();\r
-}\r
-\r
-void UNL8157_Init(CartInfo *info)\r
-{\r
-  info->Power=UNL8157Power;\r
-  info->Reset=UNL8157Reset;\r
-  GameStateRestore=UNL8157Restore;\r
-  AddExState(&StateRegs, ~0, 0, 0);\r
-}\r
+/* FCE Ultra - NES/Famicom Emulator
+ *
+ * Copyright notice for this file:
+ *  Copyright (C) 2005 CaH4e3
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "mapinc.h"
+
+static uint16 cmdreg;
+static uint8 invalid_data;
+static SFORMAT StateRegs[]=
+{
+  {&cmdreg, 2, "CMDREG"},
+  {0}
+};
+
+static void Sync(void)
+{
+  setprg16r((cmdreg&0x060)>>5,0x8000,(cmdreg&0x01C)>>2);
+  setprg16r((cmdreg&0x060)>>5,0xC000,(cmdreg&0x200)?(~0):0);
+  setmirror(((cmdreg&2)>>1)^1);
+}
+
+static DECLFR(UNL8157Read)
+{
+  if(invalid_data&&cmdreg&0x100)
+    return 0xFF;
+  else
+    return CartBR(A);
+}
+
+static DECLFW(UNL8157Write)
+{
+  cmdreg=A;
+  Sync();
+}
+
+static void UNL8157Power(void)
+{
+  setchr8(0);
+  SetWriteHandler(0x8000,0xFFFF,UNL8157Write);
+  SetReadHandler(0x8000,0xFFFF,UNL8157Read);
+  cmdreg=0x200;
+  invalid_data=1;
+  Sync();
+}
+
+static void UNL8157Reset(void)
+{
+  cmdreg=0;
+  invalid_data^=1;
+  Sync();
+}
+
+static void UNL8157Restore(int version)
+{
+  Sync();
+}
+
+void UNL8157_Init(CartInfo *info)
+{
+  info->Power=UNL8157Power;
+  info->Reset=UNL8157Reset;
+  GameStateRestore=UNL8157Restore;
+  AddExState(&StateRegs, ~0, 0, 0);
+}