SixtyPical

SixtyPical is a very low-level programming language, similar to 6502 assembly, with static analysis through abstract interpretation.

In practice, this means it catches things like

• you forgot to clear carry before adding something to the accumulator
• a subroutine that you call trashes a register you thought was preserved

and suchlike.

It is a work in progress, currently at the proof-of-concept stage.

The current released version of SixtyPical is 0.3.

Documentation

• Design Goals — coming soon.
• SixtyPical specification
• [Literate test suite for SixtyPical execution](tests/SixtyPical Execution.md)
• [Literate test suite for SixtyPical analysis](tests/SixtyPical Analysis.md)
• [6502 Opcodes used/not used in SixtyPical](doc/6502 Opcodes.md)

TODO

For 0.4:

• while loops.
• repeat loops.
• explicitly-addressed memory locations

For 0.5:

• add line number (or at least routine name) to error messages.
• hexadecimal literals.
• if not.
• 6502-mnemonic aliases (sec, clc)
• other handy aliases (eq for z, etc.)
• source code comments.

For 0.6:

• word type.
• table type constructor and indirect addressing.