merge mapper code from FCEUX
[fceu.git] / boards / 183.c
index 5e80a6b..bf0b7c0 100644 (file)
-/* 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
- *
- * Gimmick Bootleg
- */
-
-#include "mapinc.h"
-
-static uint8 prg[4];
-static uint8 chr[8];
-static uint8 IRQCount;
-static uint8 IRQPre;
-static uint8 IRQa;
-
-static SFORMAT StateRegs[]=
-{
-  {prg, 4, "PRG"},
-  {chr, 8, "CHR"},
-  {&IRQCount, 1, "IRQCOUNT"},
-  {&IRQPre, 1, "IRQPRE"},
-  {&IRQa, 1, "IRQA"},
-  {0}
-};
-
-static void SyncPrg(void)
-{
-  setprg8(0x6000,0);
-  setprg8(0x8000,prg[0]);
-  setprg8(0xA000,prg[1]);
-  setprg8(0xC000,prg[2]);
-  setprg8(0xE000,~0);
-}
-
-static void SyncChr(void)
-{
-  int i;
-  for(i=0; i<8; i++)
-     setchr1(i<<10,chr[i]);
-}
-
-static void StateRestore(int version)
-{
-  SyncPrg();
-  SyncChr();
-}
-
-static DECLFW(M183Write)
-{
-  if(((A&0xF80C)>=0xB000)&&((A&0xF80C)<=0xE00C))
-  {
-    uint8 index=(((A&0x7000)>>11)-6)|((A&8)>>3);
-    chr[index]=(chr[index]&(0xF0>>(A&4)))|((V&0x0F)<<(A&4));
-    SyncChr();
-  }
-  else switch (A&0xF80C)
-  {
-    case 0x8800: prg[0]=V; SyncPrg(); break;
-    case 0xA800: prg[1]=V; SyncPrg(); break;
-    case 0xA000: prg[2]=V; SyncPrg(); break;
-    case 0x9800: switch (V&3)
-                 {
-                   case 0: setmirror(MI_V); break;
-                   case 1: setmirror(MI_H); break;
-                   case 2: setmirror(MI_0); break;
-                   case 3: setmirror(MI_1); break;
-                 }
-                 break;
-    case 0xF000: IRQCount=((IRQCount&0xF0)|(V&0xF)); break;
-    case 0xF004: IRQCount=((IRQCount&0x0F)|((V&0xF)<<4)); break;
-    case 0xF008: IRQa=V; if(!V)IRQPre=0; X6502_IRQEnd(FCEU_IQEXT); break;
-    case 0xF00C: IRQPre=16; break;
-  }
-}
-
-static void M183IRQCounter(void)
-{
-  if(IRQa)
-  {
-    IRQCount++;
-    if((IRQCount-IRQPre)==238)
-      X6502_IRQBegin(FCEU_IQEXT);
-  }
-}
-
-static void M183Power(void)
-{
-  IRQPre=IRQCount=IRQa=0;
-  SetReadHandler(0x8000,0xFFFF,CartBR);
-  SetWriteHandler(0x8000,0xFFFF,M183Write);
-  SetReadHandler(0x6000,0x7FFF,CartBR);
-  SyncPrg();
-  SyncChr();
-}
-
-void Mapper183_Init(CartInfo *info)
-{
-  info->Power=M183Power;
-  GameHBIRQHook=M183IRQCounter;
-  GameStateRestore=StateRestore;
-  AddExState(&StateRegs, ~0, 0, 0);
-}
+/* 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA\r
+ *\r
+ * Gimmick Bootleg (VRC4 mapper)\r
+ */\r
+\r
+#include "mapinc.h"\r
+\r
+static uint8 prg[4];\r
+static uint8 chr[8];\r
+static uint8 IRQCount;\r
+static uint8 IRQPre;\r
+static uint8 IRQa;\r
+\r
+static SFORMAT StateRegs[]=\r
+{\r
+  {prg, 4, "PRG"},\r
+  {chr, 8, "CHR"},\r
+  {&IRQCount, 1, "IRQCOUNT"},\r
+  {&IRQPre, 1, "IRQPRE"},\r
+  {&IRQa, 1, "IRQA"},\r
+  {0}\r
+};\r
+\r
+static void SyncPrg(void)\r
+{\r
+  setprg8(0x6000,0);\r
+  setprg8(0x8000,prg[0]);\r
+  setprg8(0xA000,prg[1]);\r
+  setprg8(0xC000,prg[2]);\r
+  setprg8(0xE000,~0);\r
+}\r
+\r
+static void SyncChr(void)\r
+{\r
+  int i;\r
+  for(i=0; i<8; i++)\r
+     setchr1(i<<10,chr[i]);\r
+}\r
+\r
+static void StateRestore(int version)\r
+{\r
+  SyncPrg();\r
+  SyncChr();\r
+}\r
+\r
+static DECLFW(M183Write)\r
+{\r
+  if(((A&0xF80C)>=0xB000)&&((A&0xF80C)<=0xE00C))\r
+  {\r
+    uint8 index=(((A>>11)-6)|(A>>3))&7;\r
+    chr[index]=(chr[index]&(0xF0>>(A&4)))|((V&0x0F)<<(A&4));\r
+    SyncChr();\r
+  }\r
+  else switch (A&0xF80C)\r
+  {\r
+    case 0x8800: prg[0]=V; SyncPrg(); break;\r
+    case 0xA800: prg[1]=V; SyncPrg(); break;\r
+    case 0xA000: prg[2]=V; SyncPrg(); break;\r
+    case 0x9800: switch (V&3)\r
+                 {\r
+                   case 0: setmirror(MI_V); break;\r
+                   case 1: setmirror(MI_H); break;\r
+                   case 2: setmirror(MI_0); break;\r
+                   case 3: setmirror(MI_1); break;\r
+                 }\r
+                 break;\r
+    case 0xF000: IRQCount=((IRQCount&0xF0)|(V&0xF)); break;\r
+    case 0xF004: IRQCount=((IRQCount&0x0F)|((V&0xF)<<4)); break;\r
+    case 0xF008: IRQa=V; if(!V)IRQPre=0; X6502_IRQEnd(FCEU_IQEXT); break;\r
+    case 0xF00C: IRQPre=16; break;\r
+  }\r
+}\r
+\r
+static void M183IRQCounter(void)\r
+{\r
+  if(IRQa)\r
+  {\r
+    IRQCount++;\r
+    if((IRQCount-IRQPre)==238)\r
+      X6502_IRQBegin(FCEU_IQEXT);\r
+  }\r
+}\r
+\r
+static void M183Power(void)\r
+{\r
+  IRQPre=IRQCount=IRQa=0;\r
+  SetReadHandler(0x8000,0xFFFF,CartBR);\r
+  SetWriteHandler(0x8000,0xFFFF,M183Write);\r
+  SetReadHandler(0x6000,0x7FFF,CartBR);\r
+  SyncPrg();\r
+  SyncChr();\r
+}\r
+\r
+void Mapper183_Init(CartInfo *info)\r
+{\r
+  info->Power=M183Power;\r
+  GameHBIRQHook=M183IRQCounter;\r
+  GameStateRestore=StateRestore;\r
+  AddExState(&StateRegs, ~0, 0, 0);\r
+}\r