43725da7 |
1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 1998 BERO\r |
5 | * Copyright (C) 2002 Xodnizel\r |
6 | * Copyright (C) 2012 CaH4e3\r |
7 | *\r |
8 | * This program is free software; you can redistribute it and/or modify\r |
9 | * it under the terms of the GNU General Public License as published by\r |
10 | * the Free Software Foundation; either version 2 of the License, or\r |
11 | * (at your option) any later version.\r |
12 | *\r |
13 | * This program is distributed in the hope that it will be useful,\r |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of\r |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r |
16 | * GNU General Public License for more details.\r |
17 | *\r |
18 | * You should have received a copy of the GNU General Public License\r |
19 | * along with this program; if not, write to the Free Software\r |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
21 | *\r |
22 | * Oeka-kids board\r |
23 | *\r |
24 | * I might want to add some code to the mapper 96 PPU hook function\r |
25 | * to not change CHR banks if the attribute table is being accessed,\r |
26 | * if I make emulation a little more accurate in the future.\r |
27 | *\r |
28 | */\r |
29 | \r |
30 | #include "mapinc.h"\r |
31 | \r |
32 | static uint8 reg, ppulatch;\r |
33 | \r |
34 | static SFORMAT StateRegs[]=\r |
35 | {\r |
36 | {®, 1, "REG"},\r |
37 | {&ppulatch, 1, "PPUL"},\r |
38 | {0}\r |
39 | };\r |
40 | \r |
41 | static void Sync(void)\r |
42 | {\r |
43 | setmirror(MI_0);\r |
44 | setprg32(0x8000,reg & 3);\r |
45 | setchr4(0x0000,(reg & 4) | ppulatch);\r |
46 | setchr4(0x1000,(reg & 4) | 3);\r |
47 | }\r |
48 | \r |
49 | static DECLFW(M96Write)\r |
50 | {\r |
51 | reg = V;\r |
52 | Sync();\r |
53 | }\r |
54 | \r |
55 | static void FP_FASTAPASS(1) M96Hook(uint32 A)\r |
56 | {\r |
57 | if((A & 0x3000) == 0x2000)\r |
58 | {\r |
59 | ppulatch = (A>>8) & 3;\r |
60 | Sync();\r |
61 | }\r |
62 | }\r |
63 | \r |
64 | static void M96Power(void)\r |
65 | {\r |
66 | reg = ppulatch = 0;\r |
67 | Sync();\r |
68 | SetReadHandler(0x8000,0xffff,CartBR);\r |
69 | SetWriteHandler(0x8000,0xffff,M96Write);\r |
70 | }\r |
71 | \r |
72 | static void StateRestore(int version)\r |
73 | {\r |
74 | Sync();\r |
75 | }\r |
76 | \r |
77 | void Mapper96_Init(CartInfo *info)\r |
78 | {\r |
79 | info->Power=M96Power;\r |
80 | PPU_hook=M96Hook;\r |
81 | GameStateRestore=StateRestore;\r |
82 | AddExState(&StateRegs, ~0, 0, 0);\r |
83 | }\r |
84 | \r |