assembler/

p32asm.py — the P32W two-pass assembler (ISA v0, ../docs/isa-v0.md).

Mnemonics, opcodes and formats come from ../microcode/p32isa.py, so the assembler and the emulator cannot disagree about an encoding. Edit the instruction set there, not here.

python3 p32asm.py src.asm [-o out.bin] [-l listing.txt]

Output is a flat little-endian image starting at address 0 (the ROM). The syntax, directives and pseudo-instructions (LI, LA, MOV, NOT, PUSH/POP, BGT/BLE, BEQZ/BNEZ, …) are listed in the module docstring. .include "file" splices in another source file (path relative to the including file); MFCR/MTCR take control-register names (STATUS, EPC, CAUSE, BADADDR, VBR, USP).