The MESA 4I39 is a general purpose programmable I/O card for the PC/104 bus. The 4I39 uses a 200K gate Xilinx FPGA for all logic, so it is truly an Anything I/O card.  The 4I39 is designed for RS-422 applications and provides 8 full duplex isolated RS-422 interfaces.  Each interface is capable of 10 Mb per second communication.  The FPGA configuration is downloaded from the PC/104 bus interface. In addition to the RS-422 I/O, 24 5V tolerant TTL I/O lines are provided via a 50 pin connector with I/O module rack compatible pinout. The 4I39 is useful for motion control systems, interfacing SSI type encoders, as a general purpose high speed serial interface card, interfacing legacy hardware and devices with proprietary protocols.