merge mapper code from FCEUX

[fceu.git] / boards / ghostbusters63in1.c

diff --git a/boards/ghostbusters63in1.c b/boards/ghostbusters63in1.c
new file mode 100644 (file)
index 0000000..627f16d
--- /dev/null
+++ b/boards/ghostbusters63in1.c
@@ -0,0 +1,106 @@
+/* FCE Ultra - NES/Famicom Emulator\r
+ *\r
+ * Copyright notice for this file:\r
+ *  Copyright (C) 2007 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
+ * 63in1 ghostbusters\r
+ */\r
+\r
+#include "mapinc.h"\r
+\r
+static uint8 reg[2], bank;\r
+static uint8 banks[4] = {0, 0, 1, 2};\r
+static uint8 *CHRROM=NULL;\r
+static uint32 CHRROMSIZE;\r
+\r
+static SFORMAT StateRegs[]=\r
+{\r
+  {reg, 2, "REGS"},\r
+  {&bank, 1, "BANK"},\r
+  {0}\r
+};\r
+\r
+static void Sync(void)\r
+{\r
+  if(reg[0]&0x20)\r
+  {\r
+    setprg16r(banks[bank],0x8000,reg[0]&0x1F);\r
+    setprg16r(banks[bank],0xC000,reg[0]&0x1F);\r
+  }\r
+  else\r
+    setprg32r(banks[bank],0x8000,(reg[0]>>1)&0x0F);\r
+  if(reg[1]&2)\r
+    setchr8r(0x10,0);\r
+  else\r
+    setchr8(0);\r
+  setmirror((reg[0]&0x40)>>6);\r
+}\r
+\r
+static DECLFW(BMCGhostbusters63in1Write)\r
+{\r
+  reg[A&1]=V;\r
+  bank=((reg[0]&0x80)>>7)|((reg[1]&1)<<1);\r
+//  FCEU_printf("reg[0]=%02x, reg[1]=%02x, bank=%02x\n",reg[0],reg[1],bank);\r
+  Sync();\r
+}\r
+\r
+static DECLFR(BMCGhostbusters63in1Read)\r
+{\r
+  if(bank==1)\r
+    return X.DB;\r
+  else\r
+    return CartBR(A);\r
+}\r
+\r
+static void BMCGhostbusters63in1Power(void)\r
+{\r
+  reg[0]=reg[1]=0;\r
+  Sync();\r
+  SetReadHandler(0x8000,0xFFFF,BMCGhostbusters63in1Read);\r
+  SetWriteHandler(0x8000,0xFFFF,BMCGhostbusters63in1Write);\r
+}\r
+\r
+static void BMCGhostbusters63in1Reset(void)\r
+{\r
+  reg[0]=reg[1]=0;\r
+}\r
+\r
+static void StateRestore(int version)\r
+{\r
+  Sync();\r
+}\r
+\r
+static void BMCGhostbusters63in1Close(void)\r
+{\r
+  if(CHRROM)\r
+    FCEU_gfree(CHRROM);\r
+  CHRROM=NULL;\r
+}\r
+\r
+void BMCGhostbusters63in1_Init(CartInfo *info)\r
+{\r
+  info->Reset=BMCGhostbusters63in1Reset;\r
+  info->Power=BMCGhostbusters63in1Power;\r
+  info->Close=BMCGhostbusters63in1Close;\r
+\r
+  CHRROMSIZE=8192; // dummy CHRROM, VRAM disable\r
+  CHRROM=(uint8*)FCEU_gmalloc(CHRROMSIZE);\r
+  SetupCartPRGMapping(0x10,CHRROM,CHRROMSIZE,0);\r
+  AddExState(CHRROM, CHRROMSIZE, 0, "CHRROM");\r
+\r
+  GameStateRestore=StateRestore;\r
+  AddExState(&StateRegs, ~0, 0, 0);\r
+}\r