An operating system from Microsoft that runs on early x86 era PCs. There were multiple flavors of DOS, but MS-DOS was the big one.


Build a DOS program with a protected mode wrapper using Open Watcom 2.0

Compile with wcl386.exe to use the protected mode wrapper and skip all the DOS memory model junk.

Mount difficult floppy images in DOSBox-X

If you can't mount a floppy image, try setting Option: mount images read-only

Change the text mode in DOSBox-X

In Z:TEXTUTIL there are COM files you can run to change the text size.


Open Watcom v2

This is the C/C++ compiler I've been using the most lately. It installs pretty cleanly into a virtual directory using DosBox-X.


An SDK for DOS programs that lets you skip low level programming.