Tales of C, the 6502 and the BBC (with added python)
summary
Build claim: a working C compiler in python that emits native 6502 assembly for the BBC Micro, limited to simple C (no structs/unions/array init) and 16‑bit integers. Tools: a Python lexer/parser producing a 670‑node AST, an IR and register/stack codegen. Surprises: the 6502 has ~53 opcodes and needs a custom stack for pointer‑relative addressing, plus a hand‑rolled 16‑bit multiply. Outcome: compiler compiles to disk and can just‑in‑time compile and run on a real BBC Micro via SSH; recursion and basic globals work.
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