--- /dev/null
+/* 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
+ */\r
+\r
+#include "mapinc.h"\r
+\r
+static uint8 is23;\r
+static uint16 IRQCount;\r
+static uint8 IRQLatch,IRQa;\r
+static uint8 prgreg[2];\r
+static uint8 chrreg[8];\r
+static uint8 regcmd, irqcmd, mirr, big_bank;\r
+static uint16 acount=0;\r
+\r
+static uint8 *WRAM=NULL;\r
+static uint32 WRAMSIZE;\r
+\r
+static SFORMAT StateRegs[]=\r
+{\r
+ {prgreg, 2, "PRGREGS"},\r
+ {chrreg, 8, "CHRREGS"},\r
+ {®cmd, 1, "REGCMD"},\r
+ {&irqcmd, 1, "IRQCMD"},\r
+ {&mirr, 1, "MIRR"},\r
+ {&big_bank, 1, "BIGB"},\r
+ {&IRQCount, 2, "IRCN"},\r
+ {&IRQLatch, 1, "IRQL"},\r
+ {&IRQa, 1, "IRQA"},\r
+ {0}\r
+};\r
+\r
+static void Sync(void)\r
+{\r
+ if(regcmd&2)\r
+ {\r
+ setprg8(0xC000,prgreg[0]|big_bank);\r
+ setprg8(0x8000,((~1)&0x1F)|big_bank);\r
+ }\r
+ else\r
+ {\r
+ setprg8(0x8000,prgreg[0]|big_bank);\r
+ setprg8(0xC000,((~1)&0x1F)|big_bank);\r
+ }\r
+ setprg8(0xA000,prgreg[1]|big_bank);\r
+ setprg8(0xE000,((~0)&0x1F)|big_bank);\r
+ if(UNIFchrrama)\r
+ setchr8(0);\r
+ else\r
+ {\r
+ uint8 i;\r
+ for(i=0; i<8; i++)\r
+ setchr1(i<<10, chrreg[i]);\r
+ }\r
+ switch(mirr&0x3)\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
+}\r
+\r
+static DECLFW(M23Write)\r
+{\r
+// FCEU_printf("%04x:%04x\n",A,V);\r
+ A|=((A>>2)&0x3)|((A>>4)&0x3)|((A>>6)&0x3); // actually there is many-in-one mapper source, some pirate or\r
+ // licensed games use various address bits for registers\r
+ A&=0xF003;\r
+ if((A>=0xB000)&&(A<=0xE003))\r
+ {\r
+ if(UNIFchrrama)\r
+ big_bank=(V&8)<<2; // my personally many-in-one feature ;) just for support pirate cart 2-in-1\r
+ else\r
+ { \r
+ uint16 i=((A>>1)&1)|((A-0xB000)>>11);\r
+ chrreg[i]&=(0xF0)>>((A&1)<<2);\r
+ chrreg[i]|=(V&0xF)<<((A&1)<<2);\r
+ }\r
+ Sync();\r
+ }\r
+ else\r
+ switch(A&0xF003)\r
+ {\r
+ case 0x8000: \r
+ case 0x8001: \r
+ case 0x8002: \r
+ case 0x8003: if(is23) \r
+ prgreg[0]=V&0x1F; \r
+ Sync(); \r
+ break;\r
+ case 0xA000: \r
+ case 0xA001: \r
+ case 0xA002: \r
+ case 0xA003: if(is23) \r
+ prgreg[1]=V&0x1F; \r
+ else\r
+ {\r
+ prgreg[0]=(V<<1)&0x1F;\r
+ prgreg[1]=((V<<1)&0x1F)|1;\r
+ }\r
+ Sync();\r
+ break;\r
+ case 0x9000:\r
+ case 0x9001: if(V!=0xFF) mirr=V; Sync(); break;\r
+ case 0x9002: \r
+ case 0x9003: regcmd=V; Sync(); break;\r
+ case 0xF000: X6502_IRQEnd(FCEU_IQEXT); IRQLatch&=0xF0; IRQLatch|=V&0xF; break;\r
+ case 0xF001: X6502_IRQEnd(FCEU_IQEXT); IRQLatch&=0x0F; IRQLatch|=V<<4; break;\r
+ case 0xF002: X6502_IRQEnd(FCEU_IQEXT); acount=0; IRQCount=IRQLatch; IRQa=V&2; irqcmd=V&1; break;\r
+ case 0xF003: X6502_IRQEnd(FCEU_IQEXT); IRQa=irqcmd; break;\r
+ }\r
+}\r
+\r
+static void M23Power(void)\r
+{\r
+ big_bank=0x20; \r
+ Sync();\r
+ setprg8r(0x10,0x6000,0); // another many-in-one code, WRAM actually contain only WaiWaiWorld game\r
+ SetReadHandler(0x6000,0x7FFF,CartBR);\r
+ SetWriteHandler(0x6000,0x7FFF,CartBW);\r
+ SetReadHandler(0x8000,0xFFFF,CartBR);\r
+ SetWriteHandler(0x8000,0xFFFF,M23Write);\r
+}\r
+\r
+static void M23Reset(void)\r
+{\r
+}\r
+\r
+void M23IRQHook(int a)\r
+{\r
+ #define LCYCS 341\r
+ if(IRQa)\r
+ {\r
+ acount+=a*3;\r
+ if(acount>=LCYCS)\r
+ {\r
+ while(acount>=LCYCS)\r
+ {\r
+ acount-=LCYCS;\r
+ IRQCount++;\r
+ if(IRQCount&0x100) \r
+ {\r
+ X6502_IRQBegin(FCEU_IQEXT);\r
+ IRQCount=IRQLatch;\r
+ }\r
+ }\r
+ }\r
+ }\r
+}\r
+\r
+static void StateRestore(int version)\r
+{\r
+ Sync();\r
+}\r
+\r
+static void M23Close(void)\r
+{\r
+ if(WRAM)\r
+ FCEU_gfree(WRAM);\r
+}\r
+\r
+void Mapper23_Init(CartInfo *info)\r
+{\r
+ is23=1;\r
+ info->Power=M23Power;\r
+ info->Close=M23Close;\r
+ MapIRQHook=M23IRQHook;\r
+ GameStateRestore=StateRestore;\r
+\r
+ WRAMSIZE=8192;\r
+ WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
+ SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
+ AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
+\r
+ AddExState(&StateRegs, ~0, 0, 0);\r
+}\r
+\r
+void UNLT230_Init(CartInfo *info)\r
+{\r
+ is23=0;\r
+ info->Power=M23Power;\r
+ info->Close=M23Close;\r
+ MapIRQHook=M23IRQHook;\r
+ GameStateRestore=StateRestore;\r
+\r
+ WRAMSIZE=8192;\r
+ WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r
+ SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r
+ AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r
+\r
+ AddExState(&StateRegs, ~0, 0, 0);\r
+}\r
notaz.gp2x.de / fceu.git / blobdiff