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The DOS system initialization code will initialize its built-in device drivers and then load the DOS kernel, located in MSDOS.SYS on MS-DOS systems, into memory as well. In Windows 9x, the DOS system initialization code and built-in device drivers and the DOS kernel are combined into a single IO.SYS file while MSDOS.SYS is used as a text ...
MS-DOS 5.0 came in April 1991, and DR DOS 6.0 was released the following June. [90] These products are collectively referred to as "DOS", even though "Disk Operating System" is a generic term used on other systems unrelated to the x86 and IBM PC. "MS-DOS" can also be a generic reference to DOS on IBM PC compatible computers.
PC—Personal Computer; PCB—Printed Circuit Board; PCB—Process Control Block; PC DOS—Personal Computer Disc Operating System; PCI—Peripheral Component Interconnect; PCIe—PCI Express; PCI-X—PCI Extended; PCL—Printer Command Language; PCMCIA—Personal Computer Memory Card International Association; PCM—Pulse-Code Modulation
Commodore DOS, for Commodore's 8-bit computers; Cromemco DOS (CDOS), a CP/M-like operating system; CSI-DOS, for the Soviet Elektronika BK computers; DOS (Diskette Operating System), a small OS for 16-bit Data General Nova computers, a cut-down version of their RDOS. DEC BATCH-11/DOS-11, the first operating system to run on the PDP-11 minicomputer
The following description applies to DOS/360 except as otherwise noted. Later versions offer additional functionality. Because DOS/360 was designed to run on low-end models of System/360 memory usage was a concern. It was possible to generate a DOS supervisor, the resident portion of the operating system, as small as 5902 bytes.
Each computer would have its own distinct hardware and its own version of MS-DOS, a situation similar to the one that existed for CP/M, with MS-DOS emulating the same solution as CP/M to adapt for different hardware platforms. So there were many different original equipment manufacturer (OEM) versions of MS-DOS for different hardware. But the ...
IBM PC DOS (an acronym for IBM Personal Computer Disk Operating System), [nb 1] also known as PC DOS or IBM DOS, is a discontinued disk operating system for the IBM Personal Computer, its successors, and IBM PC compatibles. It was sold by IBM from the early 1980s into the 2000s.
IBM Personal Computer: May 1982: PC DOS 1.1 Microsoft: Double-sided disks: Upgraded IBM Personal Computer: March 1983: 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 ...