43725da7 |
1 | /* FCE Ultra - NES/Famicom Emulator\r |
2 | *\r |
3 | * Copyright notice for this file:\r |
4 | * Copyright (C) 2009 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 | * YOKO Mortal Kombat V Pro, VRC7 pirate clone\r |
21 | */\r |
22 | \r |
23 | #include "mapinc.h"\r |
24 | \r |
25 | static uint8 prg[3], chr[8], mirr;\r |
26 | static uint8 IRQLatch, IRQa, IRQd;\r |
27 | static uint32 IRQCount, CycleCount;\r |
28 | \r |
29 | static SFORMAT StateRegs[]=\r |
30 | {\r |
31 | {prg, 3, "PRG"},\r |
32 | {chr, 8, "CHR"},\r |
33 | {&mirr, 1, "MIRR"},\r |
34 | {&IRQa, 1, "IRQA"},\r |
35 | {&IRQd, 1, "IRQD"},\r |
36 | {&IRQLatch, 1, "IRQC"},\r |
37 | {&IRQCount, 4, "IRQC"},\r |
38 | {&CycleCount, 4, "CYCC"},\r |
39 | {0}\r |
40 | };\r |
41 | \r |
42 | static void Sync(void)\r |
43 | {\r |
44 | uint8 i;\r |
45 | setprg8(0x8000,prg[0]);\r |
46 | setprg8(0xa000,prg[1]);\r |
47 | setprg8(0xc000,prg[2]);\r |
48 | setprg8(0xe000,~0);\r |
49 | for(i=0; i<8; i++)\r |
50 | setchr1(i<<10,chr[i]);\r |
51 | switch(mirr&3)\r |
52 | {\r |
53 | case 0: setmirror(MI_V); break;\r |
54 | case 1: setmirror(MI_H); break;\r |
55 | case 2: setmirror(MI_0); break;\r |
56 | case 3: setmirror(MI_1); break;\r |
57 | }\r |
58 | }\r |
59 | \r |
60 | static DECLFW(UNLVRC7Write)\r |
61 | {\r |
62 | switch(A&0xF008)\r |
63 | {\r |
64 | case 0x8000: prg[0]=V; Sync(); break;\r |
65 | case 0x8008: prg[1]=V; Sync(); break;\r |
66 | case 0x9000: prg[2]=V; Sync(); break;\r |
67 | case 0xa000: chr[0]=V; Sync(); break;\r |
68 | case 0xa008: chr[1]=V; Sync(); break;\r |
69 | case 0xb000: chr[2]=V; Sync(); break;\r |
70 | case 0xb008: chr[3]=V; Sync(); break;\r |
71 | case 0xc000: chr[4]=V; Sync(); break;\r |
72 | case 0xc008: chr[5]=V; Sync(); break;\r |
73 | case 0xd000: chr[6]=V; Sync(); break;\r |
74 | case 0xd008: chr[7]=V; Sync(); break;\r |
75 | case 0xe000: mirr=V; Sync(); break;\r |
76 | case 0xe008:\r |
77 | IRQLatch=V;\r |
78 | X6502_IRQEnd(FCEU_IQEXT);\r |
79 | break;\r |
80 | case 0xf000:\r |
81 | IRQa=V&2;\r |
82 | IRQd=V&1;\r |
83 | if(V&2)\r |
84 | IRQCount=IRQLatch;\r |
85 | CycleCount=0;\r |
86 | X6502_IRQEnd(FCEU_IQEXT);\r |
87 | break;\r |
88 | case 0xf008:\r |
89 | if(IRQd)\r |
90 | IRQa=1;\r |
91 | else\r |
92 | IRQa=0;\r |
93 | X6502_IRQEnd(FCEU_IQEXT);\r |
94 | break;\r |
95 | } \r |
96 | }\r |
97 | \r |
98 | static void UNLVRC7Power(void)\r |
99 | {\r |
100 | Sync();\r |
101 | SetReadHandler(0x8000,0xFFFF,CartBR);\r |
102 | SetWriteHandler(0x8000,0xFFFF,UNLVRC7Write);\r |
103 | }\r |
104 | \r |
105 | static void UNLVRC7IRQHook(int a)\r |
106 | {\r |
107 | if(IRQa)\r |
108 | {\r |
109 | CycleCount+=a*3;\r |
110 | while(CycleCount>=341)\r |
111 | {\r |
112 | CycleCount-=341;\r |
113 | IRQCount++;\r |
114 | if(IRQCount==248)\r |
115 | {\r |
116 | X6502_IRQBegin(FCEU_IQEXT);\r |
117 | IRQCount=IRQLatch;\r |
118 | }\r |
119 | }\r |
120 | }\r |
121 | }\r |
122 | \r |
123 | static void StateRestore(int version)\r |
124 | {\r |
125 | Sync();\r |
126 | }\r |
127 | \r |
128 | void UNLVRC7_Init(CartInfo *info)\r |
129 | {\r |
130 | info->Power=UNLVRC7Power;\r |
131 | MapIRQHook=UNLVRC7IRQHook;\r |
132 | GameStateRestore=StateRestore;\r |
133 | AddExState(&StateRegs, ~0, 0, 0);\r |
134 | }\r |