A small and efficient Forth implementation

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README.md

foci

foci is a small Forth implementation that prioritizes performance and portability. This threaded Forth implementation uses CPU registers and native execution to maximize efficiency.

Register usage is the only platform-specific requirement; otherwise, foci is written in 100% portable C. There is active support for x86_64, ARM Cortex-M, and MSP430 architectures.

foci compiles to a binary object that can easily be linked into another application. Code size is generally a few kilobytes, while RAM usage is primarily set by the size of foci's two stacks and dictionary.

Available words

dup drop swap rot -rot over tuck @ ! c@ c! + +! - * / mod and or xor = < [ ] ,
cell cell+ cells base here allot latest negate invert 1- 1+ aligned align : ;
literal if then else ' ['] execute decimal hex . emit begin until again while
repeat

Build instructions

Run make with a supported architecture target:

make x86-64: x86_64 processors (i386 is not supported)
make arm-cm4: ARM Cortex-M4 microcontrollers
make msp430: TI MSP430 microcontrollers