case 0x4502:IRQCount&=0xFF00;IRQCount|=V;break;
case 0x4503:IRQCount&=0x00FF;IRQCount|=V<<8;IRQa=1;break;
case 0x4504: ROM_BANK8(0x8000,V);break;
case 0x4502:IRQCount&=0xFF00;IRQCount|=V;break;
case 0x4503:IRQCount&=0x00FF;IRQCount|=V<<8;IRQa=1;break;
case 0x4504: ROM_BANK8(0x8000,V);break;