J1

James Bowman The J1 is a 2010 unencoded hardwired instruction encoding
J1 instruction execution flow.

further

Many of the architectural features of the J1 processor design originate in Philip Koopman's Stack Computers: the new wave, which orients the design of the NOVIX NC4016, another 16-bit architecture significantly resembling the J1, within a broader taxonomy of stack machine processor designs.
References Philip Koopman — Stack Machines: the new wave (1989) 4.4 ARCHITECTURE OF THE NOVIX NC4016 (ece.cmu.edu) ,citation

references

James Bowman J1: a small Forth CPU Core for FPGAs excamera.com relative ease of implementation, and consequentially of adaptation and extension. https://github.com/jamesbowman/j1 P. J. Koopman, Jr., Stack computers: the new wave. New York, NY, USA: Halsted Press, 1989 variants include Richard James Howe, H2, rewritten in VHDL, a C emulator, cross-compile bootstrap with gforth github.com Steffen Reith J1Sc, rewritten in Scala/SpinalHDL, steffenreith.github.io https://github.com/stacksmith/cl-j1