I am running LOGic 5.3, a Rigblaster and hopefully a Kantronics KPC-3 on my PC. Yesterday I added an extra serial card (COM ports 3 & 4). When all was said and done I had to disable LPT1 to avoid IRQ conflicts. I have noticed some IRQs can be shared but I seem to have run out. Any suggestions would be most welcome. Harris VK6AV