release r2, update credits
[fceu.git] / boards / t-262.c
... / ...
CommitLineData
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r
19 */\r
20\r
21#include "mapinc.h"\r
22\r
23static uint16 addrreg;\r
24static uint8 datareg;\r
25static uint8 busy;\r
26static SFORMAT StateRegs[]=\r
27{\r
28 {&addrreg, 2, "AREG"},\r
29 {&datareg, 1, "DREG"},\r
30 {&busy, 1, "BUSY"},\r
31 {0}\r
32};\r
33\r
34static void Sync(void)\r
35{\r
36 uint16 base=((addrreg&0x60)>>2)|((addrreg&0x100)>>3); \r
37 setprg16(0x8000,(datareg&7)|base);\r
38 setprg16(0xC000,7|base);\r
39 setmirror(((addrreg&2)>>1)^1);\r
40}\r
41\r
42static DECLFW(BMCT262Write)\r
43{\r
44 if(busy||(A==0x8000))\r
45 datareg=V;\r
46 else\r
47 {\r
48 addrreg=A;\r
49 busy=1;\r
50 }\r
51 Sync();\r
52}\r
53\r
54static void BMCT262Power(void)\r
55{\r
56 setchr8(0);\r
57 SetWriteHandler(0x8000,0xFFFF,BMCT262Write);\r
58 SetReadHandler(0x8000,0xFFFF,CartBR);\r
59 busy=0;\r
60 addrreg=0;\r
61 datareg=0xff;\r
62 Sync();\r
63}\r
64\r
65static void BMCT262Reset(void)\r
66{\r
67 busy=0;\r
68 addrreg=0;\r
69 datareg=0;\r
70 Sync();\r
71}\r
72\r
73static void BMCT262Restore(int version)\r
74{\r
75 Sync();\r
76}\r
77\r
78void BMCT262_Init(CartInfo *info)\r
79{\r
80 info->Power=BMCT262Power;\r
81 info->Reset=BMCT262Reset;\r
82 GameStateRestore=BMCT262Restore;\r
83 AddExState(&StateRegs, ~0, 0, 0);\r
84}\r