386f5371 |
1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2007 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 |
43725da7 |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\r |
19 | *\r |
20 | * FDS Conversions\r |
21 | *\r |
386f5371 |
22 | * Super Mario Bros 2 J alt version\r |
23 | * as well as "Voleyball" FDS conversion, bank layot is similar but no bankswitching and CHR ROM present\r |
43725da7 |
24 | *\r |
25 | * mapper seems wrong researched by me ;( it should be mapper 43 modification\r |
386f5371 |
26 | */\r |
27 | \r |
28 | #include "mapinc.h"\r |
29 | \r |
30 | static uint8 prg, IRQa;\r |
31 | static uint16 IRQCount;\r |
32 | \r |
33 | static SFORMAT StateRegs[]=\r |
34 | {\r |
35 | {&prg, 1, "PRG"},\r |
36 | {&IRQa, 1, "IRQA"},\r |
37 | {&IRQCount, 2, "IRQC"},\r |
38 | {0}\r |
39 | };\r |
40 | \r |
41 | static void Sync(void)\r |
42 | {\r |
43 | setprg4r(1,0x5000,1);\r |
44 | setprg8r(1,0x6000,1);\r |
45 | setprg32(0x8000,prg);\r |
46 | setchr8(0);\r |
47 | }\r |
48 | \r |
49 | static DECLFW(UNLSMB2JWrite)\r |
50 | {\r |
51 | if(A==0x4022)\r |
52 | {\r |
53 | prg=V&1;\r |
54 | Sync();\r |
55 | }\r |
56 | if(A==0x4122)\r |
57 | {\r |
58 | IRQa=V;\r |
59 | IRQCount=0;\r |
60 | X6502_IRQEnd(FCEU_IQEXT);\r |
61 | }\r |
62 | }\r |
63 | \r |
64 | static void UNLSMB2JPower(void)\r |
65 | {\r |
66 | prg=~0;\r |
67 | Sync();\r |
68 | SetReadHandler(0x5000,0x7FFF,CartBR);\r |
69 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
70 | SetWriteHandler(0x4020,0xffff,UNLSMB2JWrite);\r |
71 | }\r |
72 | \r |
73 | static void UNLSMB2JReset(void)\r |
74 | { \r |
75 | prg=~0;\r |
76 | Sync();\r |
77 | }\r |
78 | \r |
43725da7 |
79 | static void FP_FASTAPASS(1) UNLSMB2JIRQHook(int a)\r |
386f5371 |
80 | {\r |
81 | if(IRQa)\r |
82 | {\r |
83 | IRQCount+=a*3;\r |
84 | if((IRQCount>>12)==IRQa)\r |
85 | X6502_IRQBegin(FCEU_IQEXT);\r |
86 | }\r |
87 | }\r |
88 | \r |
89 | static void StateRestore(int version)\r |
90 | {\r |
91 | Sync();\r |
92 | }\r |
93 | \r |
94 | void UNLSMB2J_Init(CartInfo *info)\r |
95 | {\r |
96 | info->Reset=UNLSMB2JReset;\r |
97 | info->Power=UNLSMB2JPower;\r |
98 | MapIRQHook=UNLSMB2JIRQHook;\r |
99 | GameStateRestore=StateRestore;\r |
100 | AddExState(&StateRegs, ~0, 0, 0);\r |
101 | }\r |