public static konami_cpu_setlines_callbackPtr aliens_banking = new konami_cpu_setlines_callbackPtr() { public void handler(int lines)
        {
		UBytePtr RAM = memory_region(REGION_CPU1);
		int offs = 0x18000;
	
	
		if ((lines & 0x10)!=0) offs -= 0x8000;
		offs += (lines & 0x0f)*0x2000;
		cpu_setbank( 1, new UBytePtr(RAM,offs) );
	}}