| 1 | /* FCE Ultra - NES/Famicom Emulator\r |
| 2 | *\r |
| 3 | * Copyright notice for this file:\r |
| 4 | * Copyright (C) 2006 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 unromchr;\r |
| 25 | static uint32 dipswitch = 0;\r |
| 26 | static uint8 *CHRRAM=NULL;\r |
| 27 | static uint32 CHRRAMSize;\r |
| 28 | \r |
| 29 | static void BMCFK23CCW(uint32 A, uint8 V)\r |
| 30 | {\r |
| 31 | if(EXPREGS[0]&0x40)\r |
| 32 | setchr8(EXPREGS[2]|unromchr);\r |
| 33 | else if(EXPREGS[0]&0x20) {\r |
| 34 | setchr1r(0x10, A, V);\r |
| 35 | }\r |
| 36 | else\r |
| 37 | {\r |
| 38 | uint16 base=(EXPREGS[2]&0x7F)<<3;\r |
| 39 | if(EXPREGS[3]&2)\r |
| 40 | {\r |
| 41 | int cbase=(MMC3_cmd&0x80)<<5;\r |
| 42 | setchr1(A,V|base);\r |
| 43 | setchr1(0x0000^cbase,DRegBuf[0]|base);\r |
| 44 | setchr1(0x0400^cbase,EXPREGS[6]|base);\r |
| 45 | setchr1(0x0800^cbase,DRegBuf[1]|base);\r |
| 46 | setchr1(0x0c00^cbase,EXPREGS[7]|base);\r |
| 47 | }\r |
| 48 | else\r |
| 49 | setchr1(A,V|base);\r |
| 50 | }\r |
| 51 | }\r |
| 52 | \r |
| 53 | static void BMCFK23CPW(uint32 A, uint8 V)\r |
| 54 | {\r |
| 55 | uint32 bank = (EXPREGS[1] & 0x1F);\r |
| 56 | uint32 hiblock = ((EXPREGS[0] & 8) << 4)|((EXPREGS[0] & 0x80) << 1)|(UNIFchrrama?((EXPREGS[2] & 0x40)<<3):0);\r |
| 57 | uint32 block = (EXPREGS[1] & 0x60) | hiblock;\r |
| 58 | uint32 extra = (EXPREGS[3] & 2);\r |
| 59 | switch(EXPREGS[0]&7)\r |
| 60 | {\r |
| 61 | case 0: setprg8(A, (block << 1) | (V & 0x3F));\r |
| 62 | if(extra)\r |
| 63 | {\r |
| 64 | setprg8(0xC000,EXPREGS[4]);\r |
| 65 | setprg8(0xE000,EXPREGS[5]);\r |
| 66 | }\r |
| 67 | break;\r |
| 68 | case 1: setprg8(A, ((hiblock | (EXPREGS[1] & 0x70)) << 1) | (V & 0x1F));\r |
| 69 | if(extra)\r |
| 70 | {\r |
| 71 | setprg8(0xC000,EXPREGS[4]);\r |
| 72 | setprg8(0xE000,EXPREGS[5]);\r |
| 73 | }\r |
| 74 | break;\r |
| 75 | case 2: setprg8(A, ((hiblock | (EXPREGS[1] & 0x78)) << 1) | (V & 0x0F));\r |
| 76 | if(extra)\r |
| 77 | {\r |
| 78 | setprg8(0xC000,EXPREGS[4]);\r |
| 79 | setprg8(0xE000,EXPREGS[5]);\r |
| 80 | }\r |
| 81 | break;\r |
| 82 | case 3: setprg16(0x8000,(bank | block));\r |
| 83 | setprg16(0xC000,(bank | block));\r |
| 84 | break;\r |
| 85 | case 4: setprg32(0x8000,(bank | block) >> 1);\r |
| 86 | break;\r |
| 87 | }\r |
| 88 | setprg8r(0x10,0x6000,A001B&3);\r |
| 89 | }\r |
| 90 | \r |
| 91 | static DECLFW(BMCFK23CHiWrite)\r |
| 92 | {\r |
| 93 | if(EXPREGS[0]&0x40)\r |
| 94 | {\r |
| 95 | if(EXPREGS[0]&0x30)\r |
| 96 | unromchr=0;\r |
| 97 | else\r |
| 98 | {\r |
| 99 | unromchr=V&3;\r |
| 100 | FixMMC3CHR(MMC3_cmd);\r |
| 101 | }\r |
| 102 | }\r |
| 103 | else\r |
| 104 | {\r |
| 105 | if((A==0x8001)&&(EXPREGS[3]&2)&&(MMC3_cmd&8))\r |
| 106 | {\r |
| 107 | EXPREGS[4|(MMC3_cmd&3)]=V;\r |
| 108 | FixMMC3PRG(MMC3_cmd);\r |
| 109 | FixMMC3CHR(MMC3_cmd);\r |
| 110 | }\r |
| 111 | else\r |
| 112 | if(A<0xC000) {\r |
| 113 | if(UNIFchrrama) { // hacky... strange behaviour, must be bit scramble due to pcb layot restrictions\r |
| 114 | // check if it not interfer with other dumps\r |
| 115 | if((A==0x8000)&&(V==0x46))\r |
| 116 | V=0x47;\r |
| 117 | else if((A==0x8000)&&(V==0x47))\r |
| 118 | V=0x46;\r |
| 119 | }\r |
| 120 | MMC3_CMDWrite(A,V);\r |
| 121 | FixMMC3PRG(MMC3_cmd);\r |
| 122 | }\r |
| 123 | else\r |
| 124 | MMC3_IRQWrite(A,V);\r |
| 125 | }\r |
| 126 | }\r |
| 127 | \r |
| 128 | static DECLFW(BMCFK23CWrite)\r |
| 129 | {\r |
| 130 | //FCEU_printf("lo %04x:%02x\n",A,V);\r |
| 131 |