Negroni

An emulator for the mythical computer “MIX” from Donald Knuth’s The Art of Computer Programming.

There are two components to negroni:

stir: The MIX emulator
shake: The MIXAL assembler

`stir`

This MIX emulator is fairly fully-featured, and almost all operations are implemented, but there are a few exceptions and limitations:

Limitations

Writing to memory being accessed by an OUT operation, or reading memory being accessed by an IN operation will cause a panic.

Missing features

Floating point operations (FADD, FSUB, FMUL, FDIV, FCMP) are not implemented.
Only a binary version of MIX is emulated.
No timing information is captured.
Typewriter and paper tape I/O is not supported.

`shake`

Limitations

String literals (for ALF operations) must be wrapped in double quotes.
Remarks at the end of a line must begin with a #.

Missing features

W-values are not supported beyond a single expression.
Invalid usage of future values do not cause errors, and produce invalid programs.

Note

Please don’t actually shake a negroni; it bruises the gin.