MS-DOS 4.0 (multitasking)
Closed source | |
| Initial release | May 15, 1986 |
|---|---|
| Final release | 4.10.30 / May 10, 1988[1] |
| Update method | Re-installation |
| Package manager | None |
| Platforms | x86 |
| Kernel type | Monolithic |
| Default user interface | Command-line interface (COMMAND.COM) |
| License | Proprietary |
| Support status | |
| Unsupported | |
MS-DOS 4.0 was a
History
As a result, the project was scaled back, and only those features promised to particular OEMs were delivered. In September 1987, a version of multi-tasking MS-DOS 4.1 was reported to be developed for the
In July 1988, IBM announced "
Features
As well as minor improvements such as support for the
Other limitations of MS-DOS 3.0 remained, including the inability to use memory above 640 KB, and this contributed to the product's lack of adoption, particularly in light of the need to write programs specifically targeted at the new environment.
Microsoft president Jon Shirley described it as a "specialized version" and went as far as saying "maybe we shouldn't have called it DOS 4.0", although it is not clear whether this was always the intention, or if a more enthusiastic response from OEMs would have resulted in it being the true successor to DOS 3.x. The marketing positioned it as an additional option between DOS 3.x for workstations, and Xenix for higher-end servers and multiuser systems.
External commands
MS-DOS Version 4.10.20 supports the following external commands:[6]
See also
- Concurrent DOS 386- Concurrent CP/M-based multiuser multitasking OS with DOS emulator since 1983
- DOS Plus - Concurrent PC DOS-based multitasking OS with DOS emulator since 1985
- DoubleDOS - enabled limited multitasking by partitioning a PC into two simultaneous DOS sessions
- OpenDOS, DR-DOS- successors of DOS Plus with preemptive multitasking in VDMs since 1993
- FlexOS - successor of Concurrent DOS 286 since 1986
- 4690 OS- successors of FlexOS 286 and FlexOS 386 since 1986
- Multiuser DOS - successor of Concurrent DOS 386 since 1991
- REAL/32- successor of Multiuser DOS since 1995
- PC-MOS/386 - multiuser multitasking DOS clone since 1987
- VM/386 - multiuser multitasking DOS environment since 1987
- TopView- DOS-based multitasking environment since 1985
- DESQview/X- DOS-based multitasking environment since 1985
- Virtual DOS machine
- Datapac Australasia
References
- ^ "icl37". www.vintage-icl-computers.com. Retrieved 2023-10-07.
- ^ "MS-DOS 4.0 in U.K.; U.S. Waiting for 5.0". InfoWorld. 1986-03-24.
- ^ "ICL launches DRS 300 80286 Professional Workstation with multi tasking MS-DOS 4.1", Computer Business Review, 1987-09-20
- ^ "IBM DOS". InfoWorld: 77. 1988-07-18.
- Brown, Ralf D. (2002-12-29). "The x86 Interrupt List". Retrieved 2011-10-14.
- ^ MS-DOS Version 4.10 Fujitsu ICL OEM
Further reading
- "Microsoft to Make MS-DOS 4.0, MS-Net 2.0 Available in Fourth Quarter". InfoWorld. 1986-09-29.
- Osterman, Larry (2004-03-22). "Did you know that OS/2 wasn't Microsoft's first non Unix multi-tasking operating system?". MSDN Blogs.
- Brooks, Vernon C. "Information about the little known multitasking MS-DOS 4.0". PC DOS Retro. Archived from the original on 2020-02-18. Retrieved 2014-02-13.
- Necasek, Michal (2013-03-11). "Multitasking MS-DOS 4.0 Lives". OS/2 Museum. Archived from the original on 2018-01-07. Retrieved 2019-07-28.
External links
Operating systems by Microsoft | |
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Disk operating systems (DOS) | |||
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| MS-DOS, IBM PC DOS, compatible systems |
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| Other x86 | 4680 OS 4690 OS ADOS Concurrent CP/M-86 Concurrent DOS CP/K Datapac System Manager K8918-OS MP/M-86 NetWare PalmDOS Novell DOS OpenDOS REAL/32 SB-86 SCP1700 Towns OS | ||
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