asm198x

Assemblers and disassemblers for retro CPUs. One binary, no runtime dependencies, the same interface on macOS, Linux and Windows.

asm198x prog.asm -o prog.bin           # assemble
asm198x disasm prog.bin                # disassemble to stdout
asm198x fmt prog.asm                   # reformat, to stdout

Where to start

If you are	Start at
Deciding whether this is worth your time	Why asm198x
Ready to run something	Quickstart
Carrying a project that already builds	Moving a project across
Looking for a flag or an opcode	The command line, Dialects, Instructions

What this book is

Generated wherever it can be. The instruction reference comes from the instruction-set crate, the dialect table from the assembler itself, and the figures on Why asm198x from the recorded verdicts they describe. The build fails if any of them falls behind what it describes.

So a number on a page is a number something counted. Where we knowingly differ from a reference assembler, Where we differ says so.