Open Source MS-DOS Compilers

A 32/64/16-bit Pascal compiler for Win32/64/CE, Linux, Mac OS X/iOS, Android, FreeBSD, OS/2, Game Boy Advance, Nintendo NDS and DOS; semantically compatible with Delphi, Borland Pascal and Mac Pascal (partially) with extra features, e.g. operator overloading.

Open-source, free, multi-platform BASIC compiler, with syntax similar MS-QuickBASIC (including the GFX statements), that adds new features such as pointers, unsigned data types, inline assembly, a pre-processor and many others.

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.

This project currently provides the GNAT Studio Ada development environment, packaged for macOS. For a source of the compiler and software packages, for various operating systems, see https://ada-lang.io and Alire. For up-to-date releases of the GNAT compiler packaged for macOS, see https://github.com/simonjwright/distributing-gcc/releases. Older releases are retained for historical reasons.

4tH is a Forth compiler with a little difference. Instead of the standard Forth engine it features a conventional compiler. 4tH is a very small compiler that can create bytecode, C-embeddable bytecode, standalone executables, but also works fine as a scripting language. It supports about 95% of the ANS Forth CORE wordset and features conditional compilation, pipes, files, assertions, forward declarations, enumerations, structures, suspended execution, recursion, include files, etc. It comes with an RPN calculator, BASIC interpreter, line editor, preprocessor, compiler, decompiler, C-source generator, a virtual machine, and a multitasking environment.

DOS/32 Advanced DOS Extender is a drop-in replacement for the DOS/4GW DOS Extender and compatibles. Being fast, small and flexible DOS/32A can be used in many environments, from embedded systems to DOS emulators, by both developers and end users alike.

helpdeco dissects HLP help files (WinHelp) of Windows 3.0, 3.1, 3.11, and '95 and many MVB multi media viewer titles into all files required for a rebuild using the appropriate help compiler HC30, HC31, HCP, HCW, HCRTF, WMVC, MMVC or MVC.

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.

FOML is an expressive logic rule language that supports object modeling, analysis, and inference. It naturally supports model-level activities, such as constraints (extending UML diagrams), dynamic compositional modeling, analysis and reasoning about models, model testing, design pattern modeling, specification of Domain Specific Modeling Languages, and meta-modeling. FOML can reason about: 1. The model meta-data (meta-model level reasoning, or syntax reasoning) 2. Data level: reason about a model and its data (instance model, i.e., diagram) FOML is built as a semantic layer on top of PathLP - a compact logic rule language of guarded path expressions, an adaptation of a subset of F-logic.

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

Fast and efficient self-assembling 80x86 assembler for DOS/Win32/Linux; with 8086-80486/Pentium/MMX/SSE/AVX/XOP instructions support, 16-bit/32-bit/64-bit code, binary/MZ/PE/COFF/ELF output formats.

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.

Compiler for high level language for Microchip PIC microcontrollers

A full development kit, based on XSCompiler. Multi-platform compiler and IDE, many libraries and examples. Uses an innovative programming language, an improved version of the standard and well-known C/C++.

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

Tiny (less then 1000 lines of code) education compiler that can compile itself. Implements small subset of C language without pointers, structures etc. Parameters and local variables also not implemented. To interface with OS Borland-style inline assembler are used (db directive only). Based on initial version of Tiny Context compiler (http://avhohlov.narod.ru/p1805en.htm). In order to simplicity compiler uses fixed source and target file names (C.C and C.COM). On Linux and any 64-bit operating systems MS DOS emulator such as DOSBox are required.

Adventure Definition Langage (ADL) - a language used to create text adventures similar to Zork and other Infocom games.

Provides, maintains, and improves the GNU development tools on Hitachi H8 series.

Forth compiler for the Compiled Virtual Machine

David Ashley's C compiler has now been GPL'd. This includes the full source, some demo programs, along with some minor changes... ACC builds 32bit exe's using TRAN's PMODE dos extender for MS-DOS.

Draak is a multi-language, macro compiler, meaning all syntax and code generation is defined in a single file. Draak is a single binary that is able to compile any context free language (like C, Pascal, Java) for any platform with only 1 file.

Open SPHiNX C-- Compiler is a set of compiler and libraries based on the "SPHiNX C--" programming language created by Peter Cellik.

Steini\\\'s Mini Compiler is a fast DOS 16 bit compiler. Please help to improve the programming language writing new commands. The compiler uses a set of assembly files for the compilation process.

Tyro is a very high level programming language designed mainly for the beginners of the programming. It makes life easier for the programming newbies.

UltraBasic is a QBasic compatible compiler, written originally by Gabriel Fernandez, and continued until 2004 by Angelo Rosina. It was hosted on Geocities, and has been moved here because of Geocities shutdown. Source code is in QB PDS 7.