There are literally dozens of 8-bit microcontroller architectures and instruction sets.Modern FPGAs can efficiently implement practically any 8-bit microcontroller, and available FPGA soft cores support popular instruction sets such as

This the default CPLD design shipped with the board. The CPLD helps reduce the number of jumpers on the board and simplifies the interaction of all the possible FPGA configuration memory sources-This is the default CPLD design shipped with the board.