3 static uint32 regchr[9];
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5 static DECLFW(Mapper27_write)
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9 if((A>=0xB000) && (A<=0xE003)) {
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10 regnum=((((A>>12)+1)&0x03)<<1)|((A&0x02)>>1);
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12 regchr[regnum]=(regchr[regnum]&0x0F)|(V<<4);
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14 regchr[regnum]=(regchr[regnum]&0xFF0)|(V&0xF);
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15 VROM_BANK1(regnum<<10,regchr[regnum]);
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19 case 0x8000: if(regchr[8]&2)
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20 ROM_BANK8(0xc000,V);
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22 ROM_BANK8(0x8000,V);
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24 case 0xA000: ROM_BANK8(0xa000,V); break;
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27 case 0:setmirror(MI_V);break;
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28 case 1:setmirror(MI_H);break;
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29 case 2:setmirror(MI_0);break;
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30 case 3:setmirror(MI_1);break;
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32 case 0x9002: regchr[8]=V; break;
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33 case 0xF000: //X6502_IRQEnd(FCEU_IQEXT);
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34 IRQLatch=(IRQLatch&0xF0)|(V&0x0F);
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36 case 0xF001: //X6502_IRQEnd(FCEU_IQEXT);
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37 IRQLatch=(IRQLatch&0x0F)|((V&0xF)<<4);
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39 case 0xF003: IRQa=((IRQa&0x1)<<1)|(IRQa&0x1);
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40 X6502_IRQEnd(FCEU_IQEXT);
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42 case 0xF002: IRQa=V&3;
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43 if(IRQa&0x02) IRQCount=IRQLatch;
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44 X6502_IRQEnd(FCEU_IQEXT);
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47 // if((A&0xF000)==0xF000) FCEU_printf("$%04x:$%02x, %d\n",A,V, scanline);
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50 static void Mapper27_hb(void)
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52 // FCEU_printf("%02x-%d,%d,%d\n",scanline,IRQa,IRQCount,IRQLatch);
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55 X6502_IRQBegin(FCEU_IQEXT);
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56 IRQCount=IRQLatch+1;
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63 void Mapper27_init(void)
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66 for (i=0; i<9; i++) {
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70 IRQCount=IRQLatch=0;
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71 SetWriteHandler(0x8000,0xffff,Mapper27_write);
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72 GameHBIRQHook=Mapper27_hb;
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