If you're looking to start playing around with a RISC-V that fits on a small FPGA, PicoRV32 [1] is a good option. It's written/maintained by Claire Wolf, who al

If you're looking to start playing around with a RISC-V that fits on a small FPGA, PicoRV32 [1] is a good option. It's written/maintained by Claire Wolf, who also started the yosys and icestorm open source synthesis projects. PicoRV32 is particularly neat because it includes an SoC wrapper [2] that allows you to place other hardware / co-processors / peripherals on the same FPGA and talk to them from the CPU via a memory mapped interface. [1] https://github.com/cliffordwolf/picorv32 https://github.com/cliffordwolf/picorv32 [2] https://github.com/cliffordwolf/picorv32/tree/master/picosoc https://github.com/cliffordwolf/picorv32/tree/master/picosoc