Seems you can start with way less than 30 instructions. A 3-INSTRUCTION FORTH FOR EMBEDDED SYSTEMS WORK Illustrated on the Motorola MC68HC11 by Frank Sergeant

Seems you can start with way less than 30 instructions. A 3-INSTRUCTION FORTH FOR EMBEDDED SYSTEMS WORK Illustrated on the Motorola MC68HC11 by Frank Sergeant https://pages.cs.wisc.edu/~bolo/shipyard/3ins4th.html#:~:text=A%203%2D%20instruction%20Forth%20makes,bytes%20for%20the%20Motorola%20MC68HC11 https://pages.cs.wisc.edu/~bolo/shipyard/3ins4th.html#:~:tex....