Add a parallel port and two rs 232 serial ports to your pc through a pci expansion slot the pci2s1p pci serialparallel combo card turns a pci slot into two external 16c550 serial ports and one external eppecp parallel port an all in one solution that gives you both parallel and serial connections while taking up only one pci slot suitable for installation in a small form factor computer the pci serialparallel card includes an optional low profilehalf height mounting bracket that make