MS-DOS 4.0x

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.


Release notes

MS-DOS 4 added support for hard drive partitions up to 2GB. It used much more of the base 640K, and was somewhat buggy.

Microsoft had long planned that MS-DOS "4" would be a multitasking-capable operating system, but IBM had insisted on creating a new version of regular DOS for use with their PS/2 computers. The below versions, as released to the consumer market, are based on DOS 3.3x and IBM's PC-DOS 4.0 enhancements. Although essentially scrapped, some narrow European markets did receive Microsoft's Multitasking MS-DOS 4.0

Microsoft's initial 4.00 release (File dates 10/6/1988) was quickly followed up by 4.01, making this an uncommon version. To add to the confusion, most OEMS badged their 4.01 disks as "4" or "4.0".

Product type
OS
Vendor
Microsoft
Release date
1988
Minimum CPU
8088
User interface
Text
Platform
DOS
Download count
1679 (101 for release)

Downloads

Download name Version Language Architecture File size Downloads
Microsoft MS-DOS 4.00 (10-6-1988) (5.25-360k) 4.00 (10-6-1988) English 747.58KB 6
Microsoft MS-DOS 4.00 (RM Nimbus OEM) (3.5-1.44mb) 4.00 (RM Nimbus OEM) English 472.05KB 2
Microsoft MS-DOS 4.01 (4-7-1989) (3.5-720k) 4.01 (4-7-1989) English 529.27KB 24
Microsoft MS-DOS 4.01 (4-7-1989) (5.25-360k) 4.01 (4-7-1989) English 3.34MB 5
Microsoft MS-DOS 4.01 (4-7-1989) (5.25-360k) (alt) 4.01 (4-7-1989) English 105.63MB 10
Microsoft MS-DOS 4.01 (Commodore OEM) (3.5-720k) 4.01 (Commodore OEM) English 1.22MB 3
Microsoft MS-DOS 4.01 (Compaq OEM (rev.D)) (5.25-360k) 4.01 (Compaq OEM (rev.D)) English 3.95MB 3
Microsoft MS-DOS 4.01 (Emerson OEM) (5.25-360k) 4.01 (Emerson OEM) English 516.33KB 2
Microsoft MS-DOS 4.01 (HP Vectra OEM) (5.25-360k) 4.01 (HP Vectra OEM) English 532.88KB 2
Microsoft MS-DOS 4.01 (Packard Bell OEM) (5.25-360k) 4.01 (Packard Bell OEM) English 604.36KB 2
Microsoft MS-DOS 4.01 (Philips OEM) (3.5-720k) 4.01 (Philips OEM) English 544.44KB 1
Microsoft MS-DOS 4.01 (Toshiba OEM) (3.5-720k) 4.01 (Toshiba OEM) English 643.43KB 2
Microsoft MS-DOS 4.01 (Zenith OEM) (3.5-720k) 4.01 (Zenith OEM) English 546.88KB 0
Microsoft MS-DOS 4.01 [Danish] (Olivetti OEM) (3.5-720k) 4.01 (Olivetti OEM) Danish 1.6MB 1
Microsoft MS-DOS 4.01 [Dutch] (Phillips OEM) (3.5-720k) 4.01 (Phillips OEM) Dutch 541.04KB 2
Microsoft MS-DOS 4.01 [Dutch] (Tulip OEM) (3.5-720k) 4.01 (Tulip OEM) Dutch 946.24KB 2
Microsoft MS-DOS 4.01 [French] (5.25-360k) 4.01 French 513.64KB 3
Microsoft MS-DOS 4.01 [French] (Amstrad OEM) (3.5-720k) 4.01 (Amstrad OEM) French 446.35KB 0
Microsoft MS-DOS 4.01 [French] (Commodore OEM) (5.25-360k).7z 4.01 (Commodore OEM) French 533.38KB 3
Microsoft MS-DOS 4.01 [German] (3.5-720k) 4.01 German 532.14KB 6
Microsoft MS-DOS 4.01 [German] (5.25-360k) 4.01 German 506.5KB 2
Microsoft MS-DOS 4.01 [German] (Amstrad OEM) (3.5-720k) 4.01 German 727.13KB 2
Microsoft MS-DOS 4.01 [German] (Commodore OEM) (3.5-720k) 4.01 (Commodore OEM) German 1.01MB 2
Microsoft MS-DOS 4.01 [German] (Commodore OEM) (3.5-720k) (alt) 4.01 (Commodore OEM) German 1.16MB 2
Microsoft MS-DOS 4.01 [German] (HP Vectra OEM) (3.5-720k) 4.01 (HP Vectra OEM) German 1.13MB 2
Microsoft MS-DOS 4.01 [Italian] (3.5-720k) 4.01 Italian 598.9KB 10
Microsoft MS-DOS 4.0X Patch Disk PD0255 4.0X Patch Disk PD0255 Upgrade English 68.91KB 1
Microsoft MS-DOS 4.0x Manual 4.0x English 3.58MB 1

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