pacoblaze
Github mirror of the PacoBlaze, a synthesizable microprocessor clone of Xilinx' PicoBlaze/KCPSM3.
PacoBlaze and KCAsm are released under the modified BSD license for maximum flexibility and usefulness.
More details can be found at the original project home.
References:
Official PicoBlaze product page
Official PicoBlaze user guide
Opbasm PicoBlaze architecture reference
PicoBlaze on Wikipedia