MS-DOS 4.0 was a multitasking release of MS-DOS developed by Microsoft based on MS-DOS 2.0. Lack of interest from OEMs, particularly IBM (who previously...
10 KB (974 words) - 16:32, 23 January 2025
Microsoft MS-DOS family: MS-DOS 4.0 (multitasking), a multitasking version in 1986/1987 by Microsoft MS-DOS 4.1 (multitasking), a multitasking version for...
974 bytes (211 words) - 17:47, 24 May 2020
Release date: November 1989 MS-DOS 4.0 (multitasking) and MS-DOS 4.1 – A separate branch of development with additional multitasking features, released between...
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windows (for its development of Windows 2.0) and multitasking. Microsoft first licensed, then purchased 86-DOS from Seattle Computer Products (SCP), which...
37 KB (3,705 words) - 01:09, 30 April 2025
graphical programs designed for Windows, as well as existing MS-DOS software. It included multitasking and the use of the mouse, and various built-in programs...
41 KB (3,851 words) - 14:29, 6 May 2025
Preemption (computing) (redirect from Pre-emptive multitasking)
provided preemptive multitasking on 1980s-era personal computers. Later MS-DOS compatible systems natively supporting preemptive multitasking/multithreading...
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IBM TopView (category DOS software)
(overlapping and side-by-side) in a multitasking fashion. Microsoft later released a multitasking version of MS-DOS 4.0 (multitasking) from what it learned from...
16 KB (1,849 words) - 21:46, 19 January 2025
SCO in 1987) MS-DOS (developed jointly with IBM, versions 1.0–6.22) Z-DOS MS-Net MS-DOS 4.0 (multitasking) MS-DOS 7 MSX-DOS (developed by MS Japan for the...
73 KB (8,398 words) - 18:15, 24 April 2025
Concurrent DOS V60 FlexOS DR DOS PC DOS – IBM's OEM version of (single-user) MS-DOS MS-DOS 4.0 (multitasking) PC-MOS/386 – unrelated multitasking DOS clone...
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"Q100021: Unable to Access Compressed Drives Using DBLBOOT.BAT Disk". Multitasking MS-DOS 4.0, Goupil OEM "expand - Windows CMD". SS64.com. Retrieved 2022-08-27...
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advantage. In late 1987, Windows/386 2.0 introduced a protected mode kernel that can multitask several MS-DOS applications using virtual 8086 mode, but...
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MS-DOS 6, Microsoft preannounced in 1994 that MS-DOS 7 would incorporate multitasking and a few other new features planned for the upcoming Windows 4.0,...
10 KB (1,140 words) - 03:14, 27 August 2024
Edition since J2SE 5.0 has included a metadata facility to allow additional annotations that are used by development tools. In DOS, the COM file format...
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in 1987 MS-DOS 4.0 (multitasking), a multitasking operating system Multitasking DOS sub-system in IBM OS/2, e.g. C:\OS2\MDOS\ Multiuser DOS (aka DR MDOS)...
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compatible with IBM PC DOS and MS-DOS. Its first release was version 3.31, named so that it would match MS-DOS's then-current version. DR DOS 5.0 was released in...
121 KB (12,096 words) - 22:17, 9 May 2025
DOS Shell is a file manager that debuted in MS-DOS and PC DOS version 4.0, released in June 1988. It was no longer included in MS-DOS version 6, but remained...
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8086 mode task.: p.2 The variant had fully preemptive multitasking,: p.2 and allowed several MS-DOS programs to run in parallel in "virtual 8086" CPU mode...
30 KB (2,604 words) - 13:38, 26 April 2025
multiuser multitasking protected mode operating systems was not DOS-based by themselves. Concurrent DOS 386 was later developed to become Multiuser DOS (since...
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retail version of MS-DOS, starting with MS-DOS 5.0. In the mid-1980s, Microsoft developed a multitasking version of DOS. This version of DOS is generally referred...
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Windows 95 (redirect from Windows 4.0)
retail on August 24, 1995. Windows 95 merged Microsoft's formerly separate MS-DOS and Microsoft Windows products into a single product and featured significant...
71 KB (7,074 words) - 10:18, 9 May 2025
first non Unix multitasking operating system? MSDN Blogs Brooks, Vernon C. "Information about the little known multitasking MS-DOS 4.0". PC DOS Retro. Archived...
235 KB (7,271 words) - 21:36, 24 April 2025
Windows 9x (redirect from MS Windows 9x)
versions of Windows 9x is 4.x. The internal versions for Windows 95, 98, and Me are 4.0, 4.1, and 4.9, respectively. Previous MS-DOS-based versions of Windows...
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allows DOS-extended programs to run either in a multitasking OS that provides its own DPMI kernel, or directly under bare-metal DOS, in which case DOS extender...
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(pre-emptive multitasking), or the running program may be coded to signal to the supervisory software when it can be interrupted (cooperative multitasking). Multitasking...
18 KB (2,082 words) - 12:36, 28 March 2025
CP/M-86 (redirect from CP/M-86 1.0)
CP/M-86 having better memory management but DOS being faster. BYTE speculated that Microsoft reserving multitasking for Xenix "appears to leave a big opening"...
31 KB (2,534 words) - 04:34, 15 February 2025
Concurrent DOS (a.k.a. CDOS, Concurrent PC DOS and CPCDOS) (since 1983), a CP/M-86 and MS-DOS 2.11 compatible multiuser, multitasking DOS, based on Concurrent...
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multitasked, but only one DOS program can be run at a time. DOS Plus attempts to present the same command-line interface as MS-DOS. Like MS-DOS, it has a command-line...
22 KB (2,049 words) - 09:22, 17 May 2024
Extended memory (redirect from Extended Memory Specification 2.0)
them. The DOS Protected Mode Interface (DPMI) is Microsoft's prescribed method for a DOS program to access extended memory under a multitasking environment...
9 KB (1,148 words) - 06:34, 2 May 2025
NetWare (redirect from NetWare 4.0)
operating system developed by Novell, Inc. It initially used cooperative multitasking to run various services on a personal computer, using the IPX network...
58 KB (7,000 words) - 11:23, 9 May 2025
Environment variable (redirect from MS-DOS environment)
%$SLICE% Used by DOS Plus accepting a numerical value to control the foreground/background time slicing of multitasking programs. See also the DOS Plus command...
102 KB (10,335 words) - 00:15, 3 April 2025