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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 |
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18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
19 | *\r |
20 | * FDS Conversion\r |
21 | *\r |
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22 | */\r |
23 | \r |
24 | #include "mapinc.h"\r |
25 | \r |
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26 | static uint8 reg, IRQa;\r |
27 | static int32 IRQCount;\r |
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28 | static uint8 *WRAM=NULL;\r |
29 | static uint32 WRAMSIZE;\r |
30 | \r |
31 | static SFORMAT StateRegs[]=\r |
32 | {\r |
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33 | {®, 1, "REG"},\r |
34 | {&IRQa, 1, "IRQA"},\r |
35 | {&IRQCount, 4, "IRQC"},\r |
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36 | {0}\r |
37 | };\r |
38 | \r |
39 | static void Sync(void)\r |
40 | {\r |
41 | setchr8(0);\r |
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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 |
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52 | }\r |
53 | \r |
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54 | static DECLFW(LH53RamWrite)\r |
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55 | {\r |
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56 | WRAM[(A-0xB800)&0x1FFF]=V;\r |
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57 | }\r |
58 | \r |
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59 | static DECLFW(LH53Write)\r |
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60 | {\r |
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61 | reg=V;\r |
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62 | Sync();\r |
63 | }\r |
64 | \r |
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65 | static DECLFW(LH53IRQaWrite)\r |
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66 | {\r |
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67 | IRQa = V&2;\r |
68 | IRQCount = 0;\r |
69 | if(!IRQa)\r |
70 | X6502_IRQEnd(FCEU_IQEXT);\r |
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71 | }\r |
72 | \r |
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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 |
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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 |
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104 | void LH53_Init(CartInfo *info)\r |
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105 | {\r |
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106 | info->Power=LH53Power;\r |
107 | info->Close=LH53Close;\r |
108 | MapIRQHook=LH53IRQ;\r |
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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 |
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115 | \r |
116 | AddExState(&StateRegs, ~0, 0, 0);\r |
117 | }\r |