| 1 | /* FCE Ultra - NES/Famicom Emulator\r |
| 2 | *\r |
| 3 | * Copyright notice for this file:\r |
| 4 | * Copyright (C) 2009 CaH4e3\r |
| 5 | *\r |
| 6 | * This program is free software; you can redistribute it and/or modify\r |
| 7 | * it under the terms of the GNU General Public License as published by\r |
| 8 | * the Free Software Foundation; either version 2 of the License, or\r |
| 9 | * (at your option) any later version.\r |
| 10 | *\r |
| 11 | * This program is distributed in the hope that it will be useful,\r |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
| 14 | * GNU General Public License for more details.\r |
| 15 | *\r |
| 16 | * You should have received a copy of the GNU General Public License\r |
| 17 | * along with this program; if not, write to the Free Software\r |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
| 19 | *\r |
| 20 | * YOKO Mortal Kombat V Pro, VRC7 pirate clone\r |
| 21 | */\r |
| 22 | \r |
| 23 | #include "mapinc.h"\r |
| 24 | \r |
| 25 | static uint8 prg[3], chr[8], mirr;\r |
| 26 | static uint8 IRQLatch, IRQa, IRQd;\r |
| 27 | static uint32 IRQCount, CycleCount;\r |
| 28 | \r |
| 29 | static SFORMAT StateRegs[]=\r |
| 30 | {\r |
| 31 | {prg, 3, "PRG"},\r |
| 32 | {chr, 8, "CHR"},\r |
| 33 | {&mirr, 1, "MIRR"},\r |
| 34 | {&IRQa, 1, "IRQA"},\r |
| 35 | {&IRQd, 1, "IRQD"},\r |
| 36 | {&IRQLatch, 1, "IRQC"},\r |
| 37 | {&IRQCount, 4, "IRQC"},\r |
| 38 | {&CycleCount, 4, "CYCC"},\r |
| 39 | {0}\r |
| 40 | };\r |
| 41 | \r |
| 42 | static void Sync(void)\r |
| 43 | {\r |
| 44 | uint8 i;\r |
| 45 | setprg8(0x8000,prg[0]);\r |
| 46 | setprg8(0xa000,prg[1]);\r |
| 47 | setprg8(0xc000,prg[2]);\r |
| 48 | setprg8(0xe000,~0);\r |
| 49 | for(i=0; i<8; i++)\r |
| 50 | setchr1(i<<10,chr[i]);\r |
| 51 | switch(mirr&3)\r |
| 52 | {\r |
| 53 | case 0: setmirror(MI_V); break;\r |
| 54 | case 1: setmirror(MI_H); break;\r |
| 55 | case 2: setmirror(MI_0); break;\r |
| 56 | case 3: setmirror(MI_1); break;\r |
| 57 | }\r |
| 58 | }\r |
| 59 | \r |
| 60 | static DECLFW(UNLVRC7Write)\r |
| 61 | {\r |
| 62 | switch(A&0xF008)\r |
| 63 | {\r |
| 64 | case 0x8000: prg[0]=V; Sync(); break;\r |
| 65 | case 0x8008: prg[1]=V; Sync(); break;\r |
| 66 | case 0x9000: prg[2]=V; Sync(); break;\r |
| 67 | case 0xa000: chr[0]=V; Sync(); break;\r |
| 68 | case 0xa008: chr[1]=V; Sync(); break;\r |
| 69 | case 0xb000: chr[2]=V; Sync(); break;\r |
| 70 | case 0xb008: chr[3]=V; Sync(); break;\r |
| 71 | case 0xc000: chr[4]=V; Sync(); break;\r |
| 72 | case 0xc008: chr[5]=V; Sync(); break;\r |
| 73 | case 0xd000: chr[6]=V; Sync(); break;\r |
| 74 | case 0xd008: chr[7]=V; Sync(); break;\r |
| 75 | case 0xe000: mirr=V; Sync(); break;\r |
| 76 | case 0xe008:\r |
| 77 | IRQLatch=V;\r |
| 78 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 79 | break;\r |
| 80 | case 0xf000:\r |
| 81 | IRQa=V&2;\r |
| 82 | IRQd=V&1;\r |
| 83 | if(V&2)\r |
| 84 | IRQCount=IRQLatch;\r |
| 85 | CycleCount=0;\r |
| 86 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 87 | break;\r |
| 88 | case 0xf008:\r |
| 89 | if(IRQd)\r |
| 90 | IRQa=1;\r |
| 91 | else\r |
| 92 | IRQa=0;\r |
| 93 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 94 | break;\r |
| 95 | } \r |
| 96 | }\r |
| 97 | \r |
| 98 | static void UNLVRC7Power(void)\r |
| 99 | {\r |
| 100 | Sync();\r |
| 101 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 102 | SetWriteHandler(0x8000,0xFFFF,UNLVRC7Write);\r |
| 103 | }\r |
| 104 | \r |
| 105 | static void UNLVRC7IRQHook(int a)\r |
| 106 | {\r |
| 107 | if(IRQa)\r |
| 108 | {\r |
| 109 | CycleCount+=a*3;\r |
| 110 | while(CycleCount>=341)\r |
| 111 | {\r |
| 112 | CycleCount-=341;\r |
| 113 | IRQCount++;\r |
| 114 | if(IRQCount==248)\r |
| 115 | {\r |
| 116 | X6502_IRQBegin(FCEU_IQEXT);\r |
| 117 | IRQCount=IRQLatch;\r |
| 118 | }\r |
| 119 | }\r |
| 120 | }\r |
| 121 | }\r |
| 122 | \r |
| 123 | static void StateRestore(int version)\r |
| 124 | {\r |
| 125 | Sync();\r |
| 126 | }\r |
| 127 | \r |
| 128 | void UNLVRC7_Init(CartInfo *info)\r |
| 129 | {\r |
| 130 | info->Power=UNLVRC7Power;\r |
| 131 | MapIRQHook=UNLVRC7IRQHook;\r |
| 132 | GameStateRestore=StateRestore;\r |
| 133 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 134 | }\r |