Registered by Albert van der Horst

A factory for generating Forth implementations for Intel 86 architectures. It includes binary releases are i.a. for Linux 1.4 or later (32/64), MS-Windows XP or later (32/64) and Apple (32 bits). This is an indirect threaded Forth, with interpreting, scripting and compilation to native binary executables.

 Copyright (2017): Albert van der Horst (HCC FORTH The Netherlands) by GNU Public License.

This is a mirror of
That site contains more binary downloads and wiki pages.


``ciforth'' is a factory for making implementations of Forth.
Forth is a standardized (ANS 94) computer language which is primarily
interactive, but has facilities for scripting and stand alone

The name ciforth derives from computer intelligence Forth, because
the original goal was to make a stand alone artificial intelligence
machine. Now you may think of it as common Intel Forth.
As long as your target is i86 based, you can pick your target to be:

    -16 32 or 64 bit

    -interfacing through BIOS, MSDOS INT 21, MSDOS DPMI, WIN32 dll,
      unix systemcalls (OSX, and LINUX) or dynamic (.so) libraries

    -can be assembled using masm, nasm, gas or fasm.

Few people want to use such a complicated system, but they still want
strict control over their Forth. The solution is a two tier system.
What ciforth will do for you is generate three files:
  - an assembler file
  - a source library
  - a generic documentation file

Of course not all combinations have been tried out, let alone tested.
Released versions have a regression test and have been through a
(sometimes considerable) burn in period. They contain not much more
than the above three files.

By modifying the assembler file you have in principle unlimited
control over your Forth In practice few are capable of doing extensive
modifications, but simple modifications are easy. There is no separate
documentation about how to build from assembler. The one or two line
instructions are contained in the source file.

The source library is Forth source. It is a text file divided
in blocks of 16 lines of 63 chars each. A simple text editor
and care will allow modifications.

The generic documentation is texinfo. This can be morphed into
PostScript, Pdf and info. Part of it is separately available
as html. Texinfo is text, and can be modified by hand too.

Releases are available for the three main OS'es: Linux, including
Android, MSWindows and OSX.
A file like READMElina.txt is associated with a release.
All tags starting with "REL" mark a release. The most important of
those are in the directory release. A report of tests is in

There is no end to the auxiliary tools that are needed to build all
versions and all other paraphernalia. described the
generic system. howto.txt is a cookbook about things you may want
to do. A detailed history of ciforth since 2000 is contained in

You may want to read the other README's.

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trunk series is the current focus of development.

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