| 1 | /* FCE Ultra - NES/Famicom Emulator\r |
| 2 | *\r |
| 3 | * Copyright notice for this file:\r |
| 4 | * Copyright (C) 2007 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 reg[16], IRQa;\r |
| 24 | static uint32 IRQCount;\r |
| 25 | static uint8 *WRAM=NULL;\r |
| 26 | static uint32 WRAMSIZE;\r |
| 27 | \r |
| 28 | static SFORMAT StateRegs[]=\r |
| 29 | {\r |
| 30 | {&IRQa, 1, "IRQA"},\r |
| 31 | {&IRQCount, 4, "IRQCOUNT"},\r |
| 32 | {reg, 16, "REGS"},\r |
| 33 | {0}\r |
| 34 | };\r |
| 35 | \r |
| 36 | static void Sync(void)\r |
| 37 | {\r |
| 38 | setchr1(0x0000,reg[0]&0xfe);\r |
| 39 | setchr1(0x0400,reg[1]|1);\r |
| 40 | setchr1(0x0800,reg[2]&0xfe);\r |
| 41 | setchr1(0x0c00,reg[3]|1);\r |
| 42 | setchr1(0x1000,reg[4]);\r |
| 43 | setchr1(0x1400,reg[5]);\r |
| 44 | setchr1(0x1800,reg[6]);\r |
| 45 | setchr1(0x1c00,reg[7]);\r |
| 46 | setprg8r(0x10,0x6000,0);\r |
| 47 | setprg8(0x8000,(reg[0x8]&0xf)|0x10);\r |
| 48 | setprg8(0xA000,(reg[0x9]&0x1f));\r |
| 49 | setprg8(0xC000,(reg[0xa]&0x1f));\r |
| 50 | setprg8(0xE000,(reg[0xb]&0xf)|0x10);\r |
| 51 | setmirror((reg[0xc]&1)^1);\r |
| 52 | }\r |
| 53 | \r |
| 54 | static DECLFW(M106Write)\r |
| 55 | {\r |
| 56 | A&=0xF;\r |
| 57 | switch(A)\r |
| 58 | {\r |
| 59 | case 0xD: IRQa=0; IRQCount=0; X6502_IRQEnd(FCEU_IQEXT); break;\r |
| 60 | case 0xE: IRQCount=(IRQCount&0xFF00)|V; break;\r |
| 61 | case 0xF: IRQCount=(IRQCount&0x00FF)|(V<<8); IRQa=1; break;\r |
| 62 | default: reg[A]=V; Sync(); break;\r |
| 63 | }\r |
| 64 | }\r |
| 65 | \r |
| 66 | static void M106Power(void)\r |
| 67 | {\r |
| 68 | reg[8]=reg[9]=reg[0xa]=reg[0xb]=-1;\r |
| 69 | Sync();\r |
| 70 | SetReadHandler(0x6000,0x7FFF,CartBR);\r |
| 71 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 72 | SetWriteHandler(0x6000,0x7FFF,CartBW);\r |
| 73 | SetWriteHandler(0x8000,0xFFFF,M106Write);\r |
| 74 | }\r |
| 75 | \r |
| 76 | static void M106Reset(void)\r |
| 77 | {\r |
| 78 | }\r |
| 79 | \r |
| 80 | static void M106Close(void)\r |
| 81 | {\r |
| 82 | if(WRAM)\r |
| 83 | FCEU_gfree(WRAM);\r |
| 84 | WRAM=NULL;\r |
| 85 | }\r |
| 86 | \r |
| 87 | void M106CpuHook(int a)\r |
| 88 | {\r |
| 89 | if(IRQa)\r |
| 90 | {\r |
| 91 | IRQCount+=a;\r |
| 92 | if(IRQCount>0x10000)\r |
| 93 | {\r |
| 94 | X6502_IRQBegin(FCEU_IQEXT);\r |
| 95 | IRQa=0;\r |
| 96 | }\r |
| 97 | }\r |
| 98 | }\r |
| 99 | \r |
| 100 | static void StateRestore(int version)\r |
| 101 | {\r |
| 102 | Sync();\r |
| 103 | }\r |
| 104 | \r |
| 105 | void Mapper106_Init(CartInfo *info)\r |
| 106 | {\r |
| 107 | info->Reset=M106Reset;\r |
| 108 | info->Power=M106Power;\r |
| 109 | info->Close=M106Close;\r |
| 110 | MapIRQHook=M106CpuHook;\r |
| 111 | GameStateRestore=StateRestore;\r |
| 112 | \r |
| 113 | WRAMSIZE=8192;\r |
| 114 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
| 115 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
| 116 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
| 117 | \r |
| 118 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 119 | }\r |