| 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
| 19 | *\r |
| 20 | * FDS Conversion\r |
| 21 | *\r |
| 22 | */\r |
| 23 | \r |
| 24 | #include "mapinc.h"\r |
| 25 | \r |
| 26 | static uint8 reg, IRQa;\r |
| 27 | static int32 IRQCount;\r |
| 28 | static uint8 *WRAM=NULL;\r |
| 29 | static uint32 WRAMSIZE;\r |
| 30 | \r |
| 31 | static SFORMAT StateRegs[]=\r |
| 32 | {\r |
| 33 | {®, 1, "REG"},\r |
| 34 | {&IRQa, 1, "IRQA"},\r |
| 35 | {&IRQCount, 4, "IRQC"},\r |
| 36 | {0}\r |
| 37 | };\r |
| 38 | \r |
| 39 | static void Sync(void)\r |
| 40 | {\r |
| 41 | setchr8(0);\r |
| 42 | setprg8(0x6000,reg);\r |
| 43 | setprg8(0x8000,0xc);\r |
| 44 | setprg4(0xa000,(0xd<<1));\r |
| 45 | setprg2(0xb000,(0xd<<2)+2);\r |
| 46 | setprg2r(0x10,0xb800,4);\r |
| 47 | setprg2r(0x10,0xc000,5);\r |
| 48 | setprg2r(0x10,0xc800,6);\r |
| 49 | setprg2r(0x10,0xd000,7);\r |
| 50 | setprg2(0xd800,(0xe<<2)+3);\r |
| 51 | setprg8(0xe000,0xf);\r |
| 52 | }\r |
| 53 | \r |
| 54 | static DECLFW(LH53RamWrite)\r |
| 55 | {\r |
| 56 | WRAM[(A-0xB800)&0x1FFF]=V;\r |
| 57 | }\r |
| 58 | \r |
| 59 | static DECLFW(LH53Write)\r |
| 60 | {\r |
| 61 | reg=V;\r |
| 62 | Sync();\r |
| 63 | }\r |
| 64 | \r |
| 65 | static DECLFW(LH53IRQaWrite)\r |
| 66 | {\r |
| 67 | IRQa = V&2;\r |
| 68 | IRQCount = 0;\r |
| 69 | if(!IRQa)\r |
| 70 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 71 | }\r |
| 72 | \r |
| 73 | static void FP_FASTAPASS(1) LH53IRQ(int a)\r |
| 74 | {\r |
| 75 | if(IRQa)\r |
| 76 | {\r |
| 77 | IRQCount+=a;\r |
| 78 | if(IRQCount>7560)\r |
| 79 | X6502_IRQBegin(FCEU_IQEXT);\r |
| 80 | }\r |
| 81 | }\r |
| 82 | \r |
| 83 | static void LH53Power(void)\r |
| 84 | {\r |
| 85 | Sync();\r |
| 86 | SetReadHandler(0x6000,0xFFFF,CartBR);\r |
| 87 | SetWriteHandler(0xB800,0xD7FF,LH53RamWrite);\r |
| 88 | SetWriteHandler(0xE000,0xEFFF,LH53IRQaWrite);\r |
| 89 | SetWriteHandler(0xF000,0xFFFF,LH53Write);\r |
| 90 | }\r |
| 91 | \r |
| 92 | static void LH53Close(void)\r |
| 93 | {\r |
| 94 | if(WRAM)\r |
| 95 | FCEU_gfree(WRAM);\r |
| 96 | WRAM=NULL;\r |
| 97 | }\r |
| 98 | \r |
| 99 | static void StateRestore(int version)\r |
| 100 | {\r |
| 101 | Sync();\r |
| 102 | }\r |
| 103 | \r |
| 104 | void LH53_Init(CartInfo *info)\r |
| 105 | {\r |
| 106 | info->Power=LH53Power;\r |
| 107 | info->Close=LH53Close;\r |
| 108 | MapIRQHook=LH53IRQ;\r |
| 109 | GameStateRestore=StateRestore;\r |
| 110 | \r |
| 111 | WRAMSIZE=8192;\r |
| 112 | WRAM=(uint8*)FCEU_gmalloc(WRAMSIZE);\r |
| 113 | SetupCartPRGMapping(0x10,WRAM,WRAMSIZE,1);\r |
| 114 | AddExState(WRAM, WRAMSIZE, 0, "WRAM");\r |
| 115 | \r |
| 116 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 117 | }\r |