I've been playing with the code examples he gives. It's a little tricky because (a) he uses Pascal, which I don't, and (b) he builds for a 68000 while my eventual target will be a 65c02.

Nonetheless, my C version can so far correctly identify all that needs to be done for (one-digit number only!) basic arithmetic:


Next steps: skip spaces, multi-digit numbers, and variables. In the first instance I'm aiming at a Tiny Basic.

Neil

p.s. note that those '=' are assignments, not comparison tests.

Seems like a good start! (Hope you don't mind, I thought it worth posting an index thread nearby)

A good thought, thanks.

Of course, the translation of these text instructions to actual 65c02 code is another question. At the moment, the basic takes a mere 86k of x86 code from C. I think it can be improved, as all it does is correctly insert text into the memory (and this).

Neil