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The category OS/2 commands deals with articles related to internal and external commands supported by members of the OS/2 family of operating systems including ArcaOS. Commands which are specific to DOS should be listed in Category:DOS commands (or its sub-categories); commands which exist in both environments should be listed in both Category ...
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PC DOS 2.0 Microsoft: Hard disk drive, subdirectories, device drivers: IBM Personal Computer XT: November 1983: PC DOS 2.1 Microsoft: Half-height disk drives, ROM cartridges: IBM PCjr: August 1984: PC DOS 3.0 Microsoft: Support for larger disks IBM Personal Computer/AT: April 1985: PC DOS 3.1 Microsoft: Local area networking support IBM PC ...
PC DOS 3.3, released with the PS/2 line, added support for high density 3 + 1 ⁄ 2-inch 1.44 MB floppy disk drives, which IBM introduced in its 80286-based and higher PS/2 models. The upgrade from DOS 3.2 to 3.3 was completely written by IBM, with no development effort on the part of Microsoft, who were working on "Advanced DOS 1.0".
OS/2 allows for 'DOS from Drive A:', (VMDISK). This is a real DOS, like MS-DOS 6.22 or PC DOS 5.00. One makes a bootable floppy disk of the DOS, adds a number of drivers from OS/2, and then creates a special image. The DOS booted this way has full access to the system, but provides its own drivers for hardware.
Originally MS-DOS was designed to be an operating system that could run on any computer with a 8086-family microprocessor.It competed with other operating systems written for such computers, such as CP/M-86 and UCSD Pascal.
MS-DOS / PC DOS and some related disk operating systems use the files mentioned here. System Files: [1] IO.SYS (or IBMBIO.COM): This contains the system initialization code and builtin device drivers; MSDOS.SYS (or IBMDOS.COM): This contains the DOS kernel. Command-line interpreter (Shell): COMMAND.COM: This is the command interpreter.
Its first release was version 3.31, named so that it would match MS-DOS's then-current version. [2] DR DOS 5.0 was released in 1990 as the first to be sold in retail; it was critically acclaimed [3] and led to DR DOS becoming the main rival to Microsoft's MS-DOS, [4] who quickly responded with its own MS-DOS 5.0 but releasing over a year later. [5]