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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 |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
19 | */\r |
20 | \r |
386f5371 |
21 | #include "mapinc.h"\r |
22 | \r |
23 | static uint8 mode;\r |
24 | static uint8 DRegs[4];\r |
25 | \r |
26 | static SFORMAT StateRegs[]=\r |
27 | {\r |
28 | {DRegs, 4, "DREG"},\r |
29 | {0}\r |
30 | };\r |
31 | \r |
32 | static void Sync(void)\r |
33 | {\r |
34 | int base, bank;\r |
35 | base = ((DRegs[0]^DRegs[1])&0x10)<<1;\r |
36 | bank = (DRegs[2]^DRegs[3])&0x1f;\r |
37 | \r |
38 | if(DRegs[1]&0x08)\r |
39 | {\r |
40 | bank &= 0xfe;\r |
41 | if(mode==0)\r |
42 | {\r |
43 | setprg16(0x8000,base+bank+1);\r |
44 | setprg16(0xC000,base+bank+0);\r |
45 | }\r |
46 | else\r |
47 | {\r |
48 | setprg16(0x8000,base+bank+0);\r |
49 | setprg16(0xC000,base+bank+1);\r |
50 | }\r |
51 | }\r |
52 | else\r |
53 | {\r |
54 | if(DRegs[1]&0x04)\r |
55 | {\r |
56 | setprg16(0x8000,0x1f);\r |
57 | setprg16(0xC000,base+bank);\r |
58 | }\r |
59 | else\r |
60 | {\r |
61 | setprg16(0x8000,base+bank);\r |
62 | if(mode==0)\r |
63 | setprg16(0xC000,0x20);\r |
64 | else\r |
65 | setprg16(0xC000,0x07);\r |
66 | }\r |
67 | }\r |
68 | }\r |
69 | \r |
70 | static DECLFW(Mapper167_write)\r |
71 | {\r |
72 | DRegs[(A>>13)&0x03]=V;\r |
73 | Sync();\r |
74 | }\r |
75 | \r |
76 | static void StateRestore(int version)\r |
77 | {\r |
78 | Sync();\r |
79 | }\r |
80 | \r |
81 | void Mapper166_init(void)\r |
82 | {\r |
83 | mode=1;\r |
84 | DRegs[0]=DRegs[1]=DRegs[2]=DRegs[3]=0;\r |
85 | Sync();\r |
86 | SetWriteHandler(0x8000,0xFFFF,Mapper167_write);\r |
87 | GameStateRestore=StateRestore;\r |
88 | AddExState(&StateRegs, ~0, 0, 0);\r |
89 | }\r |
90 | \r |
91 | void Mapper167_init(void)\r |
92 | {\r |
93 | mode=0;\r |
94 | DRegs[0]=DRegs[1]=DRegs[2]=DRegs[3]=0;\r |
95 | Sync();\r |
96 | SetWriteHandler(0x8000,0xFFFF,Mapper167_write);\r |
97 | GameStateRestore=StateRestore;\r |
98 | AddExState(&StateRegs, ~0, 0, 0);\r |
99 | }\r |