The original version of MS-DOS. This was a renamed version of QDOS which had been purchased by an upstart company called Microsoft.
MS-DOS 1.0
released
floppy
HDD
august 1981
5 1/4 Zoll
one-sided: 160 KB
none
Just before releasing version 1.25…
MS-DOS 1.25 added support for double-sided disks. Previously the disk had to be turned over to use the other side.
MS-DOS 1.25
released
floppy
HDD
August 1982
5 1/4 inch
double-sided: 320 KB
none
MS-DOS 2.0 added support for IBM's 10 MB hard disk, directories and double-density 5.25" floppy disks with capacities of 360 KB
MS-DOS 2.0
released
floppy
HDD
march 1983
5 1/4 inch
double-sided: 320 KB
FAT ?
10 MB HDD supported
Support for foreign and extended characters was added.
On the featured image on the top you see Toshiba DOS 2.11 (1987) - it supported floppies from 720kB :) (sorry for the bad quality pictures).
MS-DOS 2.1
released
floppy
HDD
October 1983
5 1/4…
Support for high-density (1.2 MB) floppy disks and 32 MB hard disks was added.
MS-DOS 3.0
released
floppy
HDD
august 1984
5 1/4 inch
double-sided: 1,2 MB
FAT ?
20 MB HDD supported
This version now supported network and memory above 640 kB !!!
MS-DOS 3.1
released
floppy
HDD
march 1985
5 1/4 inch
double-sided: 1,2 MB
FAT ?
20 MB HDD supported
3,5 inch 720 KB floppy support was introduced.
MS-DOS 3.2
released
floppy
HDD
December 1985
5 1/4 inch
double-sided: 1,2 MB
3 1/2 inch
low density: 720 kB
FAT ?
32 MB HDD supported
This release was written to take advantage of IBM's PS/2 computer range. It added support for high density 3.5" floppy disks, more than one partition on hard disks (allowing use of disks bigger than 32 MB) and code pages.
MS-DOS 3.3
released
floppy…
This version provided XMS support, support for partitions on hard disks up to 2 GB and a graphical shell. It also contained a large number of bugs and many programs refused to run on it.
Very soon version 4.01 was released with bug fixes.
MS-DOS 4.0…
This was a major upgrade. It allowed parts of DOS to load itself in the high memory area and certain device drivers and TSRs to run in the unused parts of the upper memory area between 640K and 1024K. This version also added support for IBM's new 2.88 MB…
This was a catch-up with Novell's DR-DOS 6. It added a disk-compression utility called DoubleSpace, a basic anti-virus program and a disk defragmenter. It also finally included a MOVE command, an improved backup program, MSBACKUP and multiple boot…
Extra security was built into DoubleSpace following complaints of data loss. A new disk checker, SCANDISK, was also introduced, as well as improvements to DISKCOPY and SmartDrive.
MS-DOS 6.2x
released
floppy
HDD
6.20 - 09.1993
6.21 - 03.1994
6.22 -…
These versions are versions which were shipped with Windows. Version 7.0 was shipped with Windows 95 and supported only 2GB HDD (FAT 16) only the Windows 95 version B supported FAT 32 and HDD above 2GB (DOS 7.1). DOS 8.0 is shipped with Windows ME - the…
