DOS C Compilers

• DJGPP. A free 32-bit DOS compiler. Recommended. See also Brennan's DJGPP + Game Resources.
• Borland Turbo C 2.01. A free download.
• Open Watcom C/C++. See also Paul Hsieh's Home Page.

DOS Emulators

Can't run DOS programs? Check out these DOS emulators.

• DOSBox. Emulator for Windows, Mac, Linux, and more. Recommended.
• DOSEMU. Emulator for Linux.

Links

• PC-GPE online. DOS game programming reference.
• comp.os.msdos.programmer FAQ. General DOS programming reference.
• Ralf Brown's Interrupt List. A massive guide to DOS interrupts — A must-see for DOS programmers.
• Steel's Programming Resource Page. Tutorials on 3D, VESA SVGA, and fractals. Lots of links, too.
• Brennan's DJGPP + Game Resources. Great resource for game programming using DJGPP.
• Paul Hsieh's Home Page. Information on programming, graphics, games, optimizations, Watcom C/C++, etc.
• Programmers' Lair. Tutorials on graphics, sound and artificial intelligence. Also includes game source, links, and PDFs.
• Yahoo - Game Programming. Links to many DOS-related sites.
• x2ftp. Huge DOS game programming resource. Note, this link is a mirror — the original archive appears to be no longer be available.