MS-DOS 3.20

Originally 86-DOS, written by Tim Paterson of Seattle Computer Products, DOS was a rough clone of CP/M for 8086 based hardware. Microsoft purchased it and licensed it to IBM for use with Microsoft's IBM PC language products. In 1982, Microsoft began licensing DOS to other OEMs that ported it to their custom x86 hardware and IBM PC clones.

For IBM-specific releases, please see the IBM PC-DOS product page.

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

This version adds mainstrem 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.

Product type
OS
Vendor
Microsoft
Release date
1986
Minimum CPU
8088
User interface
Text
Platform
DOS

Downloads

Download Name Version Language CPU File type File size
Microsoft MS-DOS 3.20 (1986) [Seiko Epson OEM] (5.25-360k) 3.20 (1986) [Seiko Epson OEM] English x86 5¼ Floppy 511.61KB
Microsoft MS-DOS 3.20 (1987) [Seiko Epson OEM] (5.25-360k) 3.20 (1987) [Seiko Epson OEM] English x86 5¼ Floppy 342.74KB
Microsoft MS-DOS 3.20 (6-2-1987) [HP OEM] (5.25-360k) 3.20 [HP OEM] English x86 5¼ Floppy 234.66KB
Microsoft MS-DOS 3.20 (8-14-1987) [HP OEM] (5.25-360k) 3.20 (8-14-1987) [HP OEM] English x86 5¼ Floppy 271.28KB
Microsoft MS-DOS 3.20 [ATT OEM r2.02] (5.25-360k) 3.20 [ATT OEM r2.02] English x86 5¼ Floppy 435.18KB
Microsoft MS-DOS 3.20 [Acer OEM] (5.25-360kb) 3.20 [Acer OEM] English x86 5¼ Floppy 598.6KB
Microsoft MS-DOS 3.20 [Amstrad OEM] (5.25-360k) 3.20 [Amstrad OEM] (5.25-360k) English x86 5¼ Floppy 139.6KB
Microsoft MS-DOS 3.20 [Amstrad OEM] [PC-1512] (with GEM Desktop 3.0) (5.25-360k) 3.20 [Amstrad OEM] [PC-1512] English x86 5¼ Floppy 524.94KB
Microsoft MS-DOS 3.20 [Amstrad OEM] [PC-1512] (with GEM Desktop 3.0) [French] (5.25-360k) 3.20 [Amstrad OEM] [PC-1512] French x86 5¼ Floppy 524.66KB
Microsoft MS-DOS 3.20 [Amstrad OEM] [PC-1512] (with GEM Desktop 3.0) [German] (5.25-360k) 3.20 [Amstrad OEM] [PC-1512] German x86 5¼ Floppy 526.35KB
Microsoft MS-DOS 3.20 [BULL Micral OEM] [French] (3.5-720k) 3.20 [BULL Micral OEM] French x86 3½ Floppy 241.79KB
Microsoft MS-DOS 3.20 [Commodore PC 40 OEM] (5.25-360k) 3.20 [Commodore PC 40 OEM] English x86 5¼ Floppy 248.14KB
Microsoft MS-DOS 3.20 [Data General OEM r4.00] (3.5-720k) 3.20 [Data General OEM r4.00] English x86 3½ Floppy 308.28KB
Microsoft MS-DOS 3.20 [Epson APEX OEM] (5.25-360K) 3.20 [Epson APEX OEM] English x86 5¼ Floppy 252.07KB
Microsoft MS-DOS 3.20 [Olivetti OEM] (3.5-720k) 3.20 [Olivetti OEM] English x86 Archive 229.17KB
Microsoft MS-DOS 3.20 [Olivetti Prodest PC1] [Italian] (3.5-720k) 3.20 [Olivetti Prodest PC1] Italian x86 3½ Floppy 1.67MB
Microsoft MS-DOS 3.20 [Phoenix Technologies OEM] (5.25-360k) 3.20 [Phoenix Technologies OEM] English x86 5¼ Floppy 157.51KB
Microsoft MS-DOS 3.20 [Zenith PC OEM] (5.25-360k) 3.20 [Zenith PC OEM] English x86 5¼ Floppy 218.51KB

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