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1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2005 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 |
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19 | *\r |
20 | */\r |
21 | \r |
22 | #include "mapinc.h"\r |
23 | \r |
24 | static uint8 prg_reg;\r |
25 | static uint8 chr_reg;\r |
26 | static uint8 hrd_flag;\r |
27 | \r |
28 | static SFORMAT StateRegs[]=\r |
29 | {\r |
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30 | {&hrd_flag, 1, "DPSW"},\r |
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31 | {&prg_reg, 1, "PRG"},\r |
32 | {&chr_reg, 1, "CHR"},\r |
33 | {0}\r |
34 | };\r |
35 | \r |
36 | static void Sync(void)\r |
37 | {\r |
38 | if(prg_reg&0x80)\r |
39 | setprg32(0x8000,prg_reg>>6);\r |
40 | else\r |
41 | {\r |
42 | setprg16(0x8000,(prg_reg>>5)&3);\r |
43 | setprg16(0xC000,(prg_reg>>5)&3);\r |
44 | }\r |
45 | setmirror((prg_reg&8)>>3);\r |
46 | setchr8((chr_reg&3)|(prg_reg&7)|((prg_reg&0x10)>>1));\r |
47 | }\r |
48 | \r |
49 | static DECLFR(M57Read)\r |
50 | {\r |
51 | return hrd_flag;\r |
52 | }\r |
53 | \r |
54 | static DECLFW(M57Write)\r |
55 | {\r |
56 | if((A&0x8800)==0x8800)\r |
57 | prg_reg=V;\r |
58 | else\r |
59 | chr_reg=V;\r |
60 | Sync();\r |
61 | }\r |
62 | \r |
63 | static void M57Power(void)\r |
64 | {\r |
65 | prg_reg=0;\r |
66 | chr_reg=0;\r |
67 | hrd_flag=0;\r |
68 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
69 | SetWriteHandler(0x8000,0xFFFF,M57Write);\r |
70 | SetReadHandler(0x6000,0x6000,M57Read);\r |
71 | Sync();\r |
72 | }\r |
73 | \r |
74 | static void M57Reset()\r |
75 | {\r |
76 | hrd_flag++;\r |
77 | hrd_flag&=3;\r |
78 | FCEU_printf("Select Register = %02x\n",hrd_flag);\r |
79 | }\r |
80 | \r |
81 | static void StateRestore(int version)\r |
82 | {\r |
83 | Sync();\r |
84 | }\r |
85 | \r |
86 | void Mapper57_Init(CartInfo *info)\r |
87 | {\r |
88 | info->Power=M57Power;\r |
89 | info->Reset=M57Reset;\r |
90 | GameStateRestore=StateRestore;\r |
91 | AddExState(&StateRegs, ~0, 0, 0);\r |
92 | }\r |