| 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r |
| 19 | */\r |
| 20 | \r |
| 21 | #include "mapinc.h"\r |
| 22 | \r |
| 23 | static uint8 chr_reg[4];\r |
| 24 | static uint8 kogame, prg_reg, nt1, nt2, mirr;\r |
| 25 | \r |
| 26 | static uint8 *WRAM=NULL;\r |
| 27 | static uint32 WRAMSIZE, count;\r |
| 28 | \r |
| 29 | static SFORMAT StateRegs[]=\r |
| 30 | {\r |
| 31 | {&nt1, 1, "NT1"},\r |
| 32 | {&nt2, 1, "NT2"},\r |
| 33 | {&mirr, 1, "MIRR"},\r |
| 34 | {&prg_reg, 1, "PRG"},\r |
| 35 | {&kogame, 1, "KOGAME"},\r |
| 36 | {&count, 4, "COUNT"},\r |
| 37 | {chr_reg, 4, "CHR"},\r |
| 38 | {0}\r |
| 39 | };\r |
| 40 | \r |
| 41 | static void M68NTfix(void)\r |
| 42 | {\r |
| 43 | if((!UNIFchrrama)&&(mirr&0x10))\r |
| 44 | {\r |
| 45 | PPUNTARAM = 0;\r |
| 46 | switch(mirr&3)\r |
| 47 | {\r |
| 48 | case 0: vnapage[0]=vnapage[2]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);\r |
| 49 | vnapage[1]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);\r |
| 50 | break;\r |
| 51 | case 1: vnapage[0]=vnapage[1]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);\r |
| 52 | vnapage[2]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);\r |
| 53 | break;\r |
| 54 | case 2: vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=CHRptr[0]+(((nt1|128)&CHRmask1[0])<<10);\r |
| 55 | break;\r |
| 56 | case 3: vnapage[0]=vnapage[1]=vnapage[2]=vnapage[3]=CHRptr[0]+(((nt2|128)&CHRmask1[0])<<10);\r |
| 57 | break;\r |
| 58 | }\r |
| 59 | }\r |
| 60 | else\r |
| 61 | switch(mirr&3)\r |
| 62 | {\r |
| 63 | case 0: setmirror(MI_V); break;\r |
| 64 | case 1: setmirror(MI_H); break;\r |
| 65 | case 2: setmirror(MI_0); break;\r |
| 66 | case 3: setmirror(MI_1); break;\r |
| 67 | }\r |
| 68 | }\r |
| 69 | \r |
| 70 | static void Sync(void)\r |
| 71 | {\r |
| 72 | setchr2(0x0000,chr_reg[0]);\r |
| 73 | setchr2(0x0800,chr_reg[1]);\r |
| 74 | setchr2(0x1000,chr_reg[2]);\r |
| 75 | setchr2(0x1800,chr_reg[3]);\r |
| 76 | setprg8r(0x10,0x6000,0);\r |
| 77 | setprg16r((PRGptr[1])?kogame:0,0x8000,prg_reg);\r |
| 78 | setprg16(0xC000,~0);\r |
| 79 | }\r |
| 80 | \r |
| 81 | static DECLFR(M68Read)\r |
| 82 | {\r |
| 83 | if(!(kogame&8))\r |
| 84 | {\r |
| 85 | count++;\r |
| 86 | if(count==1784)\r |
| 87 | setprg16r(0,0x8000,prg_reg);\r |
| 88 | }\r |
| 89 | return CartBR(A);\r |
| 90 | }\r |
| 91 | \r |
| 92 | static DECLFW(M68WriteLo)\r |
| 93 | {\r |
| 94 | if(!V)\r |
| 95 | { \r |
| 96 | count = 0;\r |
| 97 | setprg16r((PRGptr[1])?kogame:0,0x8000,prg_reg);\r |
| 98 | }\r |
| 99 | }\r |
| 100 | \r |
| 101 | static DECLFW(M68WriteCHR)\r |
| 102 | {\r |
| 103 | chr_reg[(A>>12)&3]=V;\r |
| 104 | Sync();\r |
| 105 | }\r |
| 106 | \r |
| 107 | static DECLFW(M68WriteNT1)\r |
| 108 | {\r |
| 109 | nt1 = V; \r |
| 110 | M68NTfix();\r |
| 111 | }\r |
| 112 | \r |
| 113 | static DECLFW(M68WriteNT2)\r |
| 114 | {\r |
| 115 | nt2 = V; \r |
| 116 | M68NTfix();\r |
| 117 | }\r |
| 118 | \r |
| 119 | static DECLFW(M68WriteMIR)\r |
| 120 | {\r |
| 121 | mirr = V;\r |
| 122 | M68NTfix();\r |
| 123 | }\r |
| 124 | \r |
| 125 | static DECLFW(M68WriteROM)\r |
| 126 | {\r |
| 127 | prg_reg = V&7;\r |
| 128 | kogame = ((V>>3)&1)^1;\r |
| 129 | Sync();\r |
| 130 | }\r |
| 131 | \r |
| 132 | static void M68Power(void)\r |
| 133 | {\r |
| 134 | prg_reg = 0;\r |
| 135 | kogame = 0;\r |
| 136 | Sync();\r |
| 137 | M68NTfix();\r |
| 138 | SetReadHandler(0x6000,0x7FFF,CartBR);\r |
| 139 | SetReadHandler(0x8000,0xBFFF,M68Read);\r |
| 140 | SetReadHandler(0xC000,0xFFFF,CartBR);\r |
| 141 | SetWriteHandler(0x8000,0xBFFF,M68WriteCHR);\r |
| 142 | SetWriteHandler(0xC000,0xCFFF,M68WriteNT1);\r |
| 143 | SetWriteHandler(0xD000,0xDFFF,M68WriteNT2);\r |
| 144 | SetWriteHandler(0xE000,0xEFFF,M68WriteMIR);\r |
| 145 | SetWriteHandler(0xF000,0xFFFF,M68WriteROM);\r |
| 146 | SetWriteHandler(0x6000,0x6000,M68WriteLo);\r |
| 147 | SetWriteHandler(0x6001,0x7FFF,CartBW);\r |
| 148 | }\r |
| 149 | \r |
| 150 | static void M68Close(void)\r |
| 151 | {\r |
| 152 | if(WRAM)\r |
| 153 | FCEU_gfree(WRAM);\r |
| 154 | WRAM=NULL;\r |
| 155 | }\r |
| 156 | \r |
| 157 | static void StateRestore(int version)\r |
| 158 | {\r |
| 159 | Sync();\r |
| 160 | M68NTfix();\r |
| 161 | }\r |
| 162 | \r |
| 163 | void Mapper68_Init(CartInfo *info)\r |
| 164 | {\r |
| 165 | info->Power=M68Power;\r |
| 166 | info->Close=M68Close;\r |
| 167 | GameStateRestore=StateRestore;\r |
| 168 | WRAMSIZE=8192;\r |
| 169 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
| 170 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
| 171 | if(info->battery)\r |
| 172 | {\r |
| 173 | info->SaveGame[0]=WRAM;\r |
| 174 | info->SaveGameLen[0]=WRAMSIZE;\r |
| 175 | }\r |
| 176 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
| 177 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 178 | }\r |