Open Source MS-DOS Cross Compilers

ACME is a free cross assembler released under the GNU GPL. It can produce code for the following processors: 6502, 6510 (including illegal opcodes), 65c02 and 65816. ACME supports the standard assembler stuff like global/local/anonymous labels, offset assembly, conditional assembly and looping assembly. It can include other source files as well as binaries while assembling. Calculations can be done in integer or float mode. Oh, and it is fast.

JWasm is a Masm-compatible assembler. It supports 16-, 32- and 64-bit code, instructions up to AVX and various output formats. It's written in C.

Modern command-line cross-compiler of 8bit processor Z80(and R800) assembly language. Support many directives(even ZX-Spectrum specific as snapshot .SNA generation), has built-in Lua scripting engine, 3-pass design. Windows/DOS/FreeBSD.

CMake build script for a GNU/Linux to DJGPP cross-compiler with POSIX threads (and std::thread). Please see the README file in the 'Files' section for more details.

MinForth V3.4 is a classic Forth system with command-line interface. Development resource requirements are minimal. A source text editor and a C compiler are sufficient. By design no toolchain is required to adapt or rebuild MinForth. A complete rebuild takes only few seconds. Current sources are for Windows and Linux (32-bit or 64-bit). MinForth primitive definitions are written in mixed Forth and C language and are transpiled to pure C code. Main but not exclusive application for the transpiler is to build the MinForth V3.4 high-level Forth compiler. MinForth V3.4 is widely conformant to the Forth-2012 draft standard and passes the usual test suites. Feedback and bug reports are welcome per - Usenet forum https://groups.google.com/forum/#!forum/comp.lang.forth - email to minforth@gmx.net

Win32 hosted tools to cross compile to DJGPP v2 (CWSDPMI) for MS-DOS. The primary reason is to be able to cross compile Allegro 3.12 using GCC 2.7.2.3 & Binutils 2.8.1. Later versions of GCC / Binutils are unable to build Allegro which leads to people either compiling on DOSBox which is incredibly slow, or just giving up all together. So party like it's 1996!

John's Mutant contains several projects. The current project is an ECMA-55 Minimal BASIC compiler for Linux systems using AMD64 compatible CPUs. You can download the MinimalBASIC compiler source in the Files section.

NedoPC SDK was moved to https://gitlab.com/nedopc/sdk

Win32 hosted tools to cross compile to DJGPP v1 (go32) for MS-DOS. Now includes GCC 1.27 aka the first version available to support the i386 processor.

VolksForth is a 16bit Forth System with the goal to produce a manageable Forthsystem for computer systems with restricted system resources.

I'm taking various older versions of the OS/2 based EMX port of GCC and re-hosting them on Win32. This way I can use multiple core machines to build my OS/2 side projects.