3 static uint32 regchr[9];
5 static DECLFW(Mapper27_write)
9 if((A>=0xB000) && (A<=0xE003)) {
10 regnum=((((A>>12)+1)&0x03)<<1)|((A&0x02)>>1);
12 regchr[regnum]=(regchr[regnum]&0x0F)|(V<<4);
14 regchr[regnum]=(regchr[regnum]&0xFF0)|(V&0xF);
15 VROM_BANK1(regnum<<10,regchr[regnum]);
19 case 0x8000: if(regchr[8]&2)
24 case 0xA000: ROM_BANK8(0xa000,V); break;
27 case 0:setmirror(MI_V);break;
28 case 1:setmirror(MI_H);break;
29 case 2:setmirror(MI_0);break;
30 case 3:setmirror(MI_1);break;
32 case 0x9002: regchr[8]=V; break;
33 case 0xF000: //X6502_IRQEnd(FCEU_IQEXT);
34 IRQLatch=(IRQLatch&0xF0)|(V&0x0F);
36 case 0xF001: //X6502_IRQEnd(FCEU_IQEXT);
37 IRQLatch=(IRQLatch&0x0F)|((V&0xF)<<4);
39 case 0xF003: IRQa=((IRQa&0x1)<<1)|(IRQa&0x1);
40 X6502_IRQEnd(FCEU_IQEXT);
42 case 0xF002: IRQa=V&3;
43 if(IRQa&0x02) IRQCount=IRQLatch;
44 X6502_IRQEnd(FCEU_IQEXT);
47 // if((A&0xF000)==0xF000) FCEU_printf("$%04x:$%02x, %d\n",A,V, scanline);
50 static void Mapper27_hb(void)
52 // FCEU_printf("%02x-%d,%d,%d\n",scanline,IRQa,IRQCount,IRQLatch);
55 X6502_IRQBegin(FCEU_IQEXT);
63 void Mapper27_init(void)
71 SetWriteHandler(0x8000,0xffff,Mapper27_write);
72 GameHBIRQHook=Mapper27_hb;