16C1050 UART with 256-byte Deep FIFO. Add RS422 and RS485 (2 or 4-wire) support to a Desktop, Server or Embedded system. Supports 2-wire and 4-wire RS485 modes. The 4-Port PCI Serial Adapter Card (RS422/RS485) with 161050 UART adds four DB9 RS422/RS485 serial ports.
eBay