We don't yet seem to have had a mention of these two:
- The J1 Forth CPU by James Bowman, which powers the gameduino. Just 200 lines of verilog.
http://www.excamera.com/sphinx/fpga-j1.html links to a PDF.
- The Kestrel-2 CPU and SBC by Samuel Falvo - a stack-based Minimal Instruction Set CPU with an as yet unconsolidated web presence. Try these:
http://www.forth.org/svfig/kk/11-2013-Falvo.txt
https://bitbucket.org/kc5tja/kestrel
https://github.com/sam-falvo/kestrel/tr ... S16X4A/doc
http://sam-falvo.github.io/kestrel/
I see more Forth cores are listed and linked at http://www.forth.org/cores.html