Unix (Linux & MacOS X) port of itsy Forth by John Metcalf
John Metcalf (http://www.retroprogramming.com/) implemented minimal forth system:
- http://www.retroprogramming.com/2012/03/itsy-forth-1k-tiny-compiler.html
- http://www.retroprogramming.com/2012/04/itsy-forth-dictionary-and-inner.html
- http://www.retroprogramming.com/2012/04/itsy-forth-primitives.html
- http://www.retroprogramming.com/2012/06/itsy-forth-compiler.html
- http://www.retroprogramming.com/2012/09/itsy-documenting-bit-twiddling-voodoo.html
Original itsy code is producing .com files and can be found in "msdos" directory of this repository.
kt97679 ported it to 32-bit linux code. DylanMc ported it to MacOS (also 32 bit). Should move to any BSD pretty easily.
Sample session:
$ make nasm itsy-linux.asm -fbin -l itsy-linux.lst -o itsy-linux chmod x itsy-linux $ ./itsy-linux : say_hi 72 emit 105 emit 33 emit 10 emit ; say_hi Hi! ^C $
TODO:
- get string literals going
- implement string operations, like ."
- implement number->string
- implement .
- if then
- do .. loop