| 1 | /* FCE Ultra - NES/Famicom Emulator\r |
| 2 | *\r |
| 3 | * Copyright notice for this file:\r |
| 4 | * Copyright (C) 2005 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 | \r |
| 21 | #include "mapinc.h"\r |
| 22 | #include "mmc3.h"\r |
| 23 | \r |
| 24 | static uint8 *CHRRAM = NULL;\r |
| 25 | static uint8 resetmode;\r |
| 26 | static int masko8[8]={63,31,15,1,3,0,0,0};\r |
| 27 | \r |
| 28 | static void Super24PW(uint32 A, uint8 V)\r |
| 29 | {\r |
| 30 | uint32 NV=V&masko8[EXPREGS[0]&7];\r |
| 31 | NV|=(EXPREGS[1]<<1);\r |
| 32 | setprg8r((NV>>6)&0xF,A,NV);\r |
| 33 | }\r |
| 34 | \r |
| 35 | static void Super24CW(uint32 A, uint8 V)\r |
| 36 | {\r |
| 37 | if(EXPREGS[0]&0x20)\r |
| 38 | setchr1r(0x10,A,V);\r |
| 39 | else\r |
| 40 | {\r |
| 41 | uint32 NV=V|(EXPREGS[2]<<3);\r |
| 42 | setchr1r((NV>>9)&0xF,A,NV);\r |
| 43 | }\r |
| 44 | }\r |
| 45 | \r |
| 46 | static DECLFW(Super24Write)\r |
| 47 | {\r |
| 48 | switch(A)\r |
| 49 | {\r |
| 50 | case 0x5FF0: EXPREGS[0]=V;\r |
| 51 | FixMMC3PRG(MMC3_cmd);\r |
| 52 | FixMMC3CHR(MMC3_cmd);\r |
| 53 | break;\r |
| 54 | case 0x5FF1: EXPREGS[1]=V;\r |
| 55 | FixMMC3PRG(MMC3_cmd);\r |
| 56 | break;\r |
| 57 | case 0x5FF2: EXPREGS[2]=V;\r |
| 58 | FixMMC3CHR(MMC3_cmd);\r |
| 59 | break;\r |
| 60 | }\r |
| 61 | }\r |
| 62 | \r |
| 63 | static DECLFW(Super24IRQ)\r |
| 64 | {\r |
| 65 | switch(A&0xE001)\r |
| 66 | {\r |
| 67 | case 0xc000: IRQLatch=V;\r |
| 68 | if(resetmode==1)\r |
| 69 | IRQCount=IRQLatch;\r |
| 70 | break;\r |
| 71 | case 0xc001: resetmode=1;\r |
| 72 | IRQCount=IRQLatch;\r |
| 73 | break;\r |
| 74 | case 0xE000: IRQa=0;\r |
| 75 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 76 | if(resetmode==1)\r |
| 77 | IRQCount=IRQLatch;\r |
| 78 | break;\r |
| 79 | case 0xE001: IRQa=1;\r |
| 80 | if(resetmode==1)\r |
| 81 | IRQCount=IRQLatch;\r |
| 82 | break;\r |
| 83 | }\r |
| 84 | }\r |
| 85 | \r |
| 86 | static void Super24HB(void)\r |
| 87 | {\r |
| 88 | resetmode=0;\r |
| 89 | if(IRQCount!=0)\r |
| 90 | {\r |
| 91 | IRQCount--;\r |
| 92 | if(IRQCount==0)\r |
| 93 | {\r |
| 94 | if(IRQa)\r |
| 95 | {\r |
| 96 | resetmode=1;\r |
| 97 | X6502_IRQBegin(FCEU_IQEXT);\r |
| 98 | }\r |
| 99 | }\r |
| 100 | }\r |
| 101 | }\r |
| 102 | \r |
| 103 | static void Super24Power(void)\r |
| 104 | {\r |
| 105 | EXPREGS[0]=0x24;\r |
| 106 | EXPREGS[1]=159;\r |
| 107 | EXPREGS[2]=0;\r |
| 108 | GenMMC3Power();\r |
| 109 | SetWriteHandler(0x5000,0x7FFF,Super24Write);\r |
| 110 | SetWriteHandler(0xC000,0xFFFF,Super24IRQ);\r |
| 111 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 112 | }\r |
| 113 | \r |
| 114 | static void Super24Reset(void)\r |
| 115 | {\r |
| 116 | EXPREGS[0]=0x24;\r |
| 117 | EXPREGS[1]=159;\r |
| 118 | EXPREGS[2]=0;\r |
| 119 | MMC3RegReset();\r |
| 120 | }\r |
| 121 | \r |
| 122 | static void Super24Close(void)\r |
| 123 | {\r |
| 124 | if(CHRRAM)\r |
| 125 | FCEU_gfree(CHRRAM);\r |
| 126 | CHRRAM = NULL;\r |
| 127 | }\r |
| 128 | \r |
| 129 | void Super24_Init(CartInfo *info)\r |
| 130 | {\r |
| 131 | info->Power=Super24Power;\r |
| 132 | info->Reset=Super24Reset;\r |
| 133 | info->Close=Super24Close;\r |
| 134 | cwrap=Super24CW;\r |
| 135 | pwrap=Super24PW;\r |
| 136 | CHRRAM=(uint8*)FCEU_gmalloc(8192);\r |
| 137 | SetupCartCHRMapping(0x10, CHRRAM, 8192, 1);\r |
| 138 | GameHBIRQHook=Super24HB;\r |
| 139 | AddExState(CHRRAM, 8192, 0, "CHRR");\r |
| 140 | AddExState(EXPREGS, 3, 0, "BIG2");\r |
| 141 | }\r |