Unusable might be a bit harsh, but I have to say that when I wrote my own BASIC interpreter last year I deliberately concentrated on the line-numbers and facili

Unusable might be a bit harsh, but I have to say that when I wrote my own BASIC interpreter last year I deliberately concentrated on the line-numbers and facilities of the ZX Spectrum I remembered: https://github.com/skx/gobasic https://github.com/skx/gobasic Being standalone it doesn't have the graphic support or the interactivity, but it was still a fun project to work upon.