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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 |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA\r |
19 | */\r |
20 | \r |
21 | //ccording to nestopia, BTL_SMB2_C, otherwise known as UNL-SMB2J\r |
22 | \r |
23 | #include "mapinc.h"\r |
24 | \r |
25 | static uint8 reg;\r |
26 | static uint8 IRQa;\r |
27 | static uint32 IRQCount;\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); \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 | switch(A&0xf1ff)\r |
52 | {\r |
53 | case 0x4022: reg=transo[V&7]; Sync(); break;\r |
54 | case 0x8122: IRQa=V&1; IRQCount=0; break;\r |
55 | }\r |
56 | }\r |
57 | \r |
58 | static void M43Power(void)\r |
59 | {\r |
60 | reg=0;\r |
61 | Sync();\r |
62 | // SetReadHandler(0x5000,0x5fff,CartBR);\r |
63 | SetReadHandler(0x5000,0xffff,CartBR);\r |
64 | SetWriteHandler(0x4020,0xffff,M43Write);\r |
65 | }\r |
66 | \r |
67 | static void M43Reset(void)\r |
68 | {\r |
69 | }\r |
70 | \r |
71 | static void M43IRQHook(int a)\r |
72 | {\r |
73 | IRQCount+=a;\r |
74 | if(IRQa)\r |
75 | if(IRQCount>=4096)\r |
76 | {\r |
77 | IRQa=0;\r |
78 | X6502_IRQBegin(FCEU_IQEXT);\r |
79 | }\r |
80 | }\r |
81 | \r |
82 | static void StateRestore(int version)\r |
83 | {\r |
84 | Sync();\r |
85 | }\r |
86 | \r |
87 | void Mapper43_Init(CartInfo *info)\r |
88 | {\r |
89 | info->Reset=M43Reset;\r |
90 | info->Power=M43Power;\r |
91 | MapIRQHook=M43IRQHook;\r |
92 | GameStateRestore=StateRestore;\r |
93 | AddExState(&StateRegs, ~0, 0, 0);\r |
94 | }\r |