| 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[4], IRQa;\r |
| 24 | static int16 IRQCount, IRQPause;\r |
| 25 | \r |
| 26 | static int16 Count = 0x0000;\r |
| 27 | \r |
| 28 | static SFORMAT StateRegs[]=\r |
| 29 | {\r |
| 30 | {reg, 4, "REGS"},\r |
| 31 | {&IRQa, 1, "IRQA"},\r |
| 32 | {&IRQCount, 2, "IRQC"},\r |
| 33 | {0}\r |
| 34 | };\r |
| 35 | \r |
| 36 | static void Sync(void)\r |
| 37 | {\r |
| 38 | setprg32(0x8000,0);\r |
| 39 | setchr8(0);\r |
| 40 | }\r |
| 41 | \r |
| 42 | //#define Count 0x1800\r |
| 43 | #define Pause 0x010\r |
| 44 | \r |
| 45 | static DECLFW(UNL3DBlockWrite)\r |
| 46 | {\r |
| 47 | switch(A)\r |
| 48 | {\r |
| 49 | //4800 32\r |
| 50 | //4900 37\r |
| 51 | //4a00 01\r |
| 52 | //4e00 18\r |
| 53 | case 0x4800: reg[0]=V; break;\r |
| 54 | case 0x4900: reg[1]=V; break;\r |
| 55 | case 0x4a00: reg[2]=V; break;\r |
| 56 | case 0x4e00: reg[3]=V; IRQCount=Count; IRQPause=Pause; IRQa=1; X6502_IRQEnd(FCEU_IQEXT); break;\r |
| 57 | } \r |
| 58 | }\r |
| 59 | \r |
| 60 | static void UNL3DBlockPower(void)\r |
| 61 | {\r |
| 62 | Sync();\r |
| 63 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
| 64 | SetWriteHandler(0x4800,0x4E00,UNL3DBlockWrite);\r |
| 65 | }\r |
| 66 | \r |
| 67 | static void UNL3DBlockReset(void)\r |
| 68 | {\r |
| 69 | Count+=0x10;\r |
| 70 | FCEU_printf("Count=%04x\n",Count);\r |
| 71 | }\r |
| 72 | \r |
| 73 | static void UNL3DBlockIRQHook(int a)\r |
| 74 | {\r |
| 75 | if(IRQa)\r |
| 76 | {\r |
| 77 | if(IRQCount>0)\r |
| 78 | {\r |
| 79 | IRQCount-=a;\r |
| 80 | }\r |
| 81 | else\r |
| 82 | {\r |
| 83 | if(IRQPause>0)\r |
| 84 | {\r |
| 85 | IRQPause-=a;\r |
| 86 | X6502_IRQBegin(FCEU_IQEXT);\r |
| 87 | }\r |
| 88 | else\r |
| 89 | {\r |
| 90 | IRQCount=Count; \r |
| 91 | IRQPause=Pause;\r |
| 92 | X6502_IRQEnd(FCEU_IQEXT);\r |
| 93 | }\r |
| 94 | }\r |
| 95 | }\r |
| 96 | }\r |
| 97 | \r |
| 98 | static void StateRestore(int version)\r |
| 99 | {\r |
| 100 | Sync();\r |
| 101 | }\r |
| 102 | \r |
| 103 | void UNL3DBlock_Init(CartInfo *info)\r |
| 104 | {\r |
| 105 | info->Power=UNL3DBlockPower;\r |
| 106 | info->Reset=UNL3DBlockReset;\r |
| 107 | MapIRQHook=UNL3DBlockIRQHook;\r |
| 108 | GameStateRestore=StateRestore;\r |
| 109 | AddExState(&StateRegs, ~0, 0, 0);\r |
| 110 | }\r |