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25 lines
1.0 KiB
Markdown
# foci
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`foci` is a small Forth implementation that prioritizes performance and portability. This threaded Forth implementation uses CPU registers and native execution to maximize efficiency.
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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.
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`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.
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## Available words
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```
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dup drop swap rot -rot over tuck @ ! c@ c! + +! - * / mod and or xor _c [ ]
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, cell cell+ cells _d base here allot latest negate invert 1- 1+ aligned align
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: ; literal _b _bz if then else \' [\'] execute decimal hex . emit
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```
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## Build instructions
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Run `make` with a supported architecture target:
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* `make x86-64`: x86\_64 processors (i386 is *not* supported)
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* `make arm-cm4`: ARM Cortex-M4 microcontrollers
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* `make msp430`: TI MSP430 microcontrollers
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