# MS-DOS

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.

## How-Tos

### 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.

## Reference

### 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.

https://open-watcom.github.io/

* Clib: https://open-watcom.github.io/open-watcom-v2-wikidocs/clib.html

### DOS SDK

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

* https://github.com/Scalibq/DOS_SDK