d97315ac |
1 | #include "mapinc.h"\r |
2 | \r |
3 | static uint32 regchr[9];\r |
4 | \r |
5 | static DECLFW(Mapper27_write)\r |
6 | {\r |
7 | A&=0xF00F;\r |
8 | int regnum;\r |
9 | if((A>=0xB000) && (A<=0xE003)) {\r |
10 | regnum=((((A>>12)+1)&0x03)<<1)|((A&0x02)>>1);\r |
11 | if(A&1)\r |
12 | regchr[regnum]=(regchr[regnum]&0x0F)|(V<<4);\r |
13 | else\r |
14 | regchr[regnum]=(regchr[regnum]&0xFF0)|(V&0xF);\r |
15 | VROM_BANK1(regnum<<10,regchr[regnum]);\r |
16 | }\r |
17 | switch(A)\r |
18 | {\r |
19 | case 0x8000: if(regchr[8]&2)\r |
20 | ROM_BANK8(0xc000,V);\r |
21 | else\r |
22 | ROM_BANK8(0x8000,V);\r |
23 | break;\r |
24 | case 0xA000: ROM_BANK8(0xa000,V); break;\r |
25 | case 0x9000:\r |
26 | switch(V&3){\r |
27 | case 0:setmirror(MI_V);break;\r |
28 | case 1:setmirror(MI_H);break;\r |
29 | case 2:setmirror(MI_0);break;\r |
30 | case 3:setmirror(MI_1);break;\r |
31 | }\r |
32 | case 0x9002: regchr[8]=V; break;\r |
33 | case 0xF000: //X6502_IRQEnd(FCEU_IQEXT);\r |
34 | IRQLatch=(IRQLatch&0xF0)|(V&0x0F);\r |
35 | break;\r |
36 | case 0xF001: //X6502_IRQEnd(FCEU_IQEXT);\r |
37 | IRQLatch=(IRQLatch&0x0F)|((V&0xF)<<4);\r |
38 | break;\r |
39 | case 0xF003: IRQa=((IRQa&0x1)<<1)|(IRQa&0x1);\r |
40 | X6502_IRQEnd(FCEU_IQEXT);\r |
41 | break;\r |
42 | case 0xF002: IRQa=V&3;\r |
43 | if(IRQa&0x02) IRQCount=IRQLatch;\r |
44 | X6502_IRQEnd(FCEU_IQEXT);\r |
45 | break;\r |
46 | }\r |
47 | // if((A&0xF000)==0xF000) FCEU_printf("$%04x:$%02x, %d\n",A,V, scanline);\r |
48 | }\r |
49 | \r |
50 | static void Mapper27_hb(void)\r |
51 | {\r |
52 | // FCEU_printf("%02x-%d,%d,%d\n",scanline,IRQa,IRQCount,IRQLatch);\r |
53 | if(IRQa&0x2){\r |
54 | if(IRQCount==0xFF){\r |
55 | X6502_IRQBegin(FCEU_IQEXT);\r |
56 | IRQCount=IRQLatch+1;\r |
57 | } else {\r |
58 | IRQCount++;\r |
59 | }\r |
60 | }\r |
61 | }\r |
62 | \r |
63 | void Mapper27_init(void)\r |
64 | {\r |
65 | int i;\r |
66 | for (i=0; i<9; i++) {\r |
67 | regchr[i]=0;\r |
68 | }\r |
69 | IRQa=0;\r |
70 | IRQCount=IRQLatch=0;\r |
71 | SetWriteHandler(0x8000,0xffff,Mapper27_write);\r |
72 | GameHBIRQHook=Mapper27_hb;\r |
73 | }\r |
74 | \r |