One nice implementation of a Forth on the 6502 is Tali Forth. The documentation is wonderful too. And it's easy to extend. One thing to keep in mind when adding

One nice implementation of a Forth on the 6502 is Tali Forth. The documentation is wonderful too. And it's easy to extend. One thing to keep in mind when adding any assembly code of your own is that it uses part of the zero page and the X register to implement the data stack and pointer, so the X register always needs to be saved. https://github.com/SamCoVT/TaliForth2 https://github.com/SamCoVT/TaliForth2