merge mapper code from FCEUX

[fceu.git] / boards / n-c22m.c

diff --git a/boards/n-c22m.c b/boards/n-c22m.c
new file mode 100644 (file)
index 0000000..49f965f
--- /dev/null
+++ b/boards/n-c22m.c
@@ -0,0 +1,103 @@
+/* FCE Ultra - NES/Famicom Emulator\r
+ *\r
+ * Copyright notice for this file:\r
+ *  Copyright (C) 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA\r
+ * Mortal Kombat 2 YOKO */\r
+\r
+#include "mapinc.h"\r
+#include "mmc3.h"\r
+\r
+static uint8 reg[8];\r
+\r
+static SFORMAT StateRegs[]=\r
+{\r
+  {reg, 8, "REGS"},\r
+  {0}\r
+};\r
+\r
+static void Sync(void)\r
+{\r
+//  FCEU_printf("(%02x, %02x)\n",reg[3],reg[4]);\r
+  setprg8(0x8000,reg[0]);\r
+  setprg8(0xA000,reg[1]);\r
+  setprg8(0xC000,reg[2]);\r
+  setprg8(0xE000,~0);\r
+//  setchr2(0x0000,reg[3]);\r
+//  setchr2(0x0800,reg[4]);\r
+//  setchr2(0x1000,reg[5]);\r
+//  setchr2(0x1800,reg[6]);\r
+  setchr2(0x0000,reg[3]);\r
+  setchr2(0x0800,reg[4]);\r
+  setchr2(0x1000,reg[5]);\r
+  setchr2(0x1800,reg[6]);\r
+}\r
+\r
+static DECLFW(MCN22MWrite)\r
+{\r
+//FCEU_printf("bs %04x %02x\n",A,V);\r
+  switch(A)\r
+  {\r
+    case 0x8c00:\r
+    case 0x8c01:\r
+    case 0x8c02: reg[A&3]=V; break;\r
+    case 0x8d10: reg[3]=V; break;\r
+    case 0x8d11: reg[4]=V; break;\r
+    case 0x8d16: reg[5]=V; break;\r
+    case 0x8d17: reg[6]=V; break;\r
+  }\r
+  Sync();\r
+}\r
+\r
+static void MCN22MPower(void)\r
+{\r
+  reg[0]=reg[1]=reg[2]=0;\r
+  Sync();  \r
+  SetReadHandler(0x8000,0xFFFF,CartBR);\r
+  SetWriteHandler(0x8000,0xFFFF,MCN22MWrite);\r
+}\r
+/*\r
+static void MCN22MIRQHook(void)\r
+{\r
+  int count = IRQCount;\r
+  if(!count || IRQReload)\r
+  {\r
+     IRQCount = IRQLatch;\r
+     IRQReload = 0;\r
+  }\r
+  else\r
+     IRQCount--;\r
+  if(!IRQCount)\r
+  {\r
+     if(IRQa)\r
+     {\r
+        X6502_IRQBegin(FCEU_IQEXT);\r
+     }\r
+  }\r
+}\r
+*/\r
+static void StateRestore(int version)\r
+{\r
+  Sync();\r
+}\r
+\r
+void UNLCN22M_Init(CartInfo *info)\r
+{\r
+  info->Power=MCN22MPower;\r
+//  GameHBIRQHook=MCN22MIRQHook;\r
+  GameStateRestore=StateRestore;\r
+  AddExState(&StateRegs, ~0, 0, 0);\r
+}\r