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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 |
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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 |
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24 | #include "mapinc.h"\r |
25 | \r |
26 | static uint8 reg;\r |
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27 | static uint32 IRQCount, IRQa;\r |
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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 |
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39 | setprg4(0x5000,16); // Only YS-612 advdnced version\r |
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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 |
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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 |
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52 | switch(A&0xf1ff)\r |
53 | {\r |
54 | case 0x4022: reg=transo[V&7]; Sync(); break;\r |
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55 | case 0x8122: // hacked version\r |
56 | case 0x4122: IRQa=V&1; X6502_IRQEnd(FCEU_IQEXT); IRQCount=0; break; // original version\r |
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57 | }\r |
58 | }\r |
59 | \r |
60 | static void M43Power(void)\r |
61 | {\r |
62 | reg=0;\r |
63 | Sync();\r |
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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 |
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72 | static void FP_FASTAPASS(1) M43IRQHook(int a)\r |
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73 | {\r |
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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 |
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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 |