-/* 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
- * Gimmick Bootleg\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&0x7000)>>11)-6)|((A&8)>>3);\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
+/* 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);
+}
notaz.gp2x.de / fceu.git / blobdiff