Microsoft MS-DOS 3.20
Released in 1986 by Microsoft
For 100% IBM PC compatibles

Image quality: Unmodified

Microsoft DOS 3.2 is the first release offered as a "vanilla" boxed
set directly to consumers, instead of just OEMs.

This version adds mainstream support for 720K 3.5" floppy drives,
although some 2.x OEM versions also supported 720K disks.

A new RAMDRIVE.SYS supports creating a ram disk in conventional, EMS,
or XMS memory.

This is the "vanilla" Microsoft release, intended to run on IBM PCs
and 100% hardware compatible clones.

Reportedly, this specific release has a bug that prevents it from
running on a genuine IBM PC model 5150 if it happens to have the very
original Rev.1 BIOS 04/24/1981 or Rev.2 BIOS 10/19/1981.

Archive includes two 5.25" 360k floppy disk images.
