DOS 4
DOS 4 refers to several different versions of the Disk Operating System (DOS) that were released by various companies. These versions include MS-DOS 4.0, PC DOS 4.0, and DR DOS 4.0. Each of these versions introduced new features and improvements over their predecessors.
MS-DOS 4.0[edit | edit source]
MS-DOS 4.0 was released by Microsoft in July 1988. It was a significant update from MS-DOS 3.3 and included several new features:
- Support for hard disk partitions larger than 32 MB.
- Introduction of the DOS Shell, a graphical file management tool.
- Enhanced memory management capabilities.
- Improved support for internationalization and localization.
Features[edit | edit source]
- DOS Shell: A graphical interface for managing files and directories.
- Large Disk Support: Ability to handle partitions larger than 32 MB.
- Memory Management: Enhanced support for EMS and XMS.
PC DOS 4.0[edit | edit source]
PC DOS 4.0 was released by IBM in 1988, around the same time as MS-DOS 4.0. It shared many of the same features as MS-DOS 4.0 but was tailored specifically for IBM's line of personal computers.
Features[edit | edit source]
- DOS Shell: Similar to the one in MS-DOS 4.0.
- Large Disk Support: Support for larger hard disk partitions.
- Improved Memory Management: Enhanced support for EMS and XMS.
DR DOS 4.0[edit | edit source]
DR DOS 4.0 was released by Digital Research in 1989. It was designed to be compatible with MS-DOS and PC DOS but included several unique features:
- TaskMAX: A task-switching utility that allowed users to switch between multiple applications.
- ViewMAX: A graphical file manager similar to the DOS Shell.
- Improved Memory Management: Better utilization of available memory compared to MS-DOS and PC DOS.
Features[edit | edit source]
- TaskMAX: Task-switching utility.
- ViewMAX: Graphical file manager.
- Memory Management: Enhanced memory management capabilities.
Related Pages[edit | edit source]
See Also[edit | edit source]
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