https://github.com/Mikey351AU/mega65-sd-commander

MyLISP65 1.1 — the LISP interpreter for the MEGA65 is updated.

A refreshed colour scheme shared with the QL and ZX Spectrum Next versions, a new HELP command with its text editable on the disk, the CPU speed shown at start-up, and a crash fix. The .d81 ships with the interpreter and seven example programs, including the computer algebra system that runs unchanged across all three machines.

Details and download in the thread: https://discord.com/channels/719326990221574164/1531379048557576222/threads/1546473465891258428

A small function that returns the factorial of a number