| 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 | * FDS Conversion\r |
| 21 | *\r |
| 22 | */\r |
| 23 | \r |
| 24 | #include "mapinc.h"\r |
| 25 | \r |
| 26 | static uint8 reg;\r |
| 27 | static uint32 IRQCount, IRQa;\r |
| 28 | \r |
| 29 | static SFORMAT StateRegs[]=\r |
| 30 | {\r |
| 31 | {&IRQCount, 4, "IRQC"},\r |
| 32 | {&IRQa, 1, "IRQA"},\r |
| 33 | {®, 1, "REG"},\r |
| 34 | {0}\r |
| 35 | };\r |
| 36 | \r |
| 37 | static void Sync(void)\r |
| 38 | {\r |
| 39 | setprg4(0x5000,16); // Only YS-612 advdnced version\r |
| 40 | setprg8(0x6000,2);\r |
| 41 | setprg8(0x8000,1);\r |
| 42 | setprg8(0xa000,0);\r |
| 43 | setprg8(0xc000,reg);\r |
| 44 | setprg8(0xe000,9);\r |
| 45 | setchr8(0);\r |
| 46 | }\r |
| 47 | \r |
| 48 | static DECLFW(M43Write)\r |
| 49 | {\r |
| 50 | // int transo[8]={4,3,4,4,4,7,5,6};\r |
| 51 | int transo[8]={4,3,5,3,6,3,7,3}; // According to hardware tests\r |
| 52 | switch(A&0xf1ff)\r |
| 53 | {\r |
| 54 | case 0x4022: reg=transo[V&7]; Sync(); break;\r |
| 55 | case 0x8122: // hacked version\r |
| 56 | case 0x4122: IRQa=V&1; X6502_IRQEnd(FCEU_IQEXT); IRQCount=0; break; // original version\r |
| 57 | }\r |
| 58 | }\r |
| 59 | \r |
| 60 | static void M43Power(void)\r |
| 61 | {\r |
| 62 | reg=0;\r |
| 63 | Sync();\r |
| 64 | SetReadHandler(0x5000,0xffff,CartBR);\r |
| 65 | SetWriteHandler(0x4020,0xffff,M43Write);\r |
| 66 | }\r |
| 67 | \r |
| 68 | static void M43Reset(void)\r |
| 69 | {\r |
| 70 | }\r |
| 71 | \r |
| 72 | static void FP_FASTAPASS(1) M43IRQHook(int a)\r |
| 73 | {\r |
| 74 | IRQCount+=a;\r |
| 75 | if(IRQa)\r |
| 76 | if(IRQCount>=4096)\r |
| 77 | {\r |
| 78 | IRQa=0;\r |
| 79 | X6502_IRQBegin(FCEU_IQEXT);\r |
| 80 | }\r |
| 81 | }\r |
| 82 | \r |
| 83 | static void StateRestore(int version)\r |
| 84 | {\r |
| 85 | Sync();\r |
| 86 | }\r |
| 87 | \r |
| 88 | void Mapper43_Init(CartInfo *info)\r |
| 89 | {\r |
| 90 | info->Reset=M43Reset;\r |
| 91 | info->Power=M43Power;\r |
| 92 | MapIRQHook=M43IRQHook;\r |
| 93 | GameStateRestore=StateRestore;\r |
| 94 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 95 | }\r |