jonnystoten / negroni

Emulator for the mythical computer "MIX" from Knuth's The Art of Computer Programming

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.