StarTech.com 2S1P PCI Serial Parallel Combo Card with 16550 UART - IEEE 1284 Card - Serial Parallel PCI - PCI Serial Adapter Add a parallel port and two RS-232 serial ports to your PC through a PCI expansion slot 2S1P PCI Serial Parallel Combo Card with 16550 UART PCI RS232 Serial Card plus Parallel Port 2x Serial and 1x Parallel Adapter Card / PCI Serial/Parallel Card Adapter / Serial RS232 Adapter Card with Parallel Port All three ports share only one IRQ which minimizes the system resources required to operate the card