| 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r |
| 19 | *\r |
| 20 | */\r |
| 21 | \r |
| 22 | #include "mapinc.h"\r |
| 23 | \r |
| 24 | static uint8 prg_reg;\r |
| 25 | static uint8 chr_reg;\r |
| 26 | static uint8 hrd_flag;\r |
| 27 | \r |
| 28 | static SFORMAT StateRegs[]=\r |
| 29 | {\r |
| 30 | {&hrd_flag, 1, "DIPSW"},\r |
| 31 | {&prg_reg, 1, "PRG"},\r |
| 32 | {&chr_reg, 1, "CHR"},\r |
| 33 | {0}\r |
| 34 | };\r |
| 35 | \r |
| 36 | static void Sync(void)\r |
| 37 | {\r |
| 38 | if(prg_reg&0x80)\r |
| 39 | setprg32(0x8000,prg_reg>>6);\r |
| 40 | else\r |
| 41 | {\r |
| 42 | setprg16(0x8000,(prg_reg>>5)&3);\r |
| 43 | setprg16(0xC000,(prg_reg>>5)&3);\r |
| 44 | }\r |
| 45 | setmirror((prg_reg&8)>>3);\r |
| 46 | setchr8((chr_reg&3)|(prg_reg&7)|((prg_reg&0x10)>>1));\r |
| 47 | }\r |
| 48 | \r |
| 49 | static DECLFR(M57Read)\r |
| 50 | {\r |
| 51 | return hrd_flag;\r |
| 52 | }\r |
| 53 | \r |
| 54 | static DECLFW(M57Write)\r |
| 55 | {\r |
| 56 | if((A&0x8800)==0x8800)\r |
| 57 | prg_reg=V;\r |
| 58 | else\r |
| 59 | chr_reg=V;\r |
| 60 | Sync();\r |
| 61 | }\r |
| 62 | \r |
| 63 | static void M57Power(void)\r |
| 64 | {\r |
| 65 | prg_reg=0;\r |
| 66 | chr_reg=0;\r |
| 67 | hrd_flag=0;\r |
| 68 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 69 | SetWriteHandler(0x8000,0xFFFF,M57Write);\r |
| 70 | SetReadHandler(0x6000,0x6000,M57Read);\r |
| 71 | Sync();\r |
| 72 | }\r |
| 73 | \r |
| 74 | static void M57Reset()\r |
| 75 | {\r |
| 76 | hrd_flag++;\r |
| 77 | hrd_flag&=3;\r |
| 78 | FCEU_printf("Select Register = %02x\n",hrd_flag);\r |
| 79 | }\r |
| 80 | \r |
| 81 | static void StateRestore(int version)\r |
| 82 | {\r |
| 83 | Sync();\r |
| 84 | }\r |
| 85 | \r |
| 86 | void Mapper57_Init(CartInfo *info)\r |
| 87 | {\r |
| 88 | info->Power=M57Power;\r |
| 89 | info->Reset=M57Reset;\r |
| 90 | GameStateRestore=StateRestore;\r |
| 91 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 92 | }\r |