The MESA 7I80HDT is a low cost, general purpose, FPGA based programmable I/O card with 100 BaseT Ethernet host connection. The 7I80HDT has a simplified UDP host data transfer system that allows operation in real time if required and compability with standard networks for non-real time applications. Dual FPGA configuration EEPROMs allow simple recovery from programming mistakes. Firmware modules are provided for hardware step generation, quadrature encoder counting,  PWM generation, digital I/O,  Smart Serial remote I/O, BISS, SSI, SPI, UART interfaces and more.  All motion control firmware is open source and easily modified to support new functions or different mixes of functions. All I/O bits are 5V tolerant and can sink 24 mA. Pullup resistors are provided for all pins so that they may be connected directly to opto-isolators, contacts etc.   The 7I80HDT has 72 I/O bits available on three 50 pin connectors, all connectors use I/O module rack compatible pinouts and are compatible with all Mesa 50 pin FPGA daughtercards.