MCS9904 Mini PCIe 4-Port RS232 Serial Controller — Mini PCI Express to 4× DB9 COM Adapter

MCS9904 mini PCI-E COM card that converts a Mini PCI Express slot into 4 RS232 serial ports. This compact controller card provides four DB9 connectors for legacy serial devices, offering a straightforward mini PCI express to DB9 adapter solution. Designed to expand serial connectivity in systems with a mini PCIe slot, the MCS9904 delivers 4 RS232 COM interfaces in a single card.