Not to be confused with Multitasking MS-DOS 4.
|Version of MS-DOS|
|Preliminary name||MS-DOS 3.40|
MS-DOS 4 is a family of versions of MS-DOS, initially released in July 1988.
New features and changes[edit | edit source]
- Support for EGA and VGA display adapters.
- Support for FAT16 partitions larger than 32 MB.
- Support for the LIM / EMS standard (driver
EMM386.SYS, access to additional memory on 386-based systems and higher), which allowed individual parts of the operating system to load into additional memory.
- Drastic improvements in functionality with the Select installation program. It now automatically creates the appropriate
- The introduction of a new
MEMcommand, which allows users to analyze the current memory configuration.
- Four countries were added in the list of supported regions.
- Graphic printing was added.
- Various new features in existing commands, which includes:
- Improved system drivers, including:
- MS-DOS shell was added.
SELECTprogram for setting up DOS on a hard disk has been transformed into a full-fledged setup wizard. Keyboard layout and install directory are now specified inside of the wizard rather than as parameters specified for
History[edit | edit source]
Initially, the project was named "MS-DOS 3.40", and under this name was mentioned in the 1988-09 issue of Serbian computer magazine "Svet Kompjutera", as well as in a contract between Microsoft and Zenith Data Systems from August 1987.
MS-DOS 4.00 was released in July 1988, only to be replaced by MS-DOS 4.01 in November 1988 due to major bugs in the shell and in the memory management system. MS-DOS 4.02 was also mentioned in an antitrust document called PX05132, however, if existing, it is yet to be found.
List of known OEM releases[edit | edit source]
MS-DOS 4.00[edit | edit source]
- RM Nimbus
MS-DOS 4.01[edit | edit source]
- Packard Bell
- RM Nimbus
MS-DOS 4.01a[edit | edit source]
MS-DOS 4.01d[edit | edit source]