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Side-by-side, CP/M cost US$200 more than PC DOS, and sales were low. CP/M faded, with MS-DOS and PC DOS becoming the marketed operating system for PCs and PC compatibles. [4] Microsoft originally sold MS-DOS only to original equipment manufacturers (OEMs). One major reason for this was that not all early PCs were 100% IBM PC compatible.
The version included with PC DOS 3.0 and 3.1 is hard-coded to transfer the operating system from A: to B:, while from PC DOS 3.2 onward you can specify the source and destination, and can be used to install DOS to the harddisk. The version included with MS-DOS 4 and PC DOS 4 is no longer a simple command-line utility, but a full-fledged installer.
Earlier versions of 4OS2 can be run under Windows NT, and OS/2 can run the two DOS and Windows NT shells, all three can be used on Windows NT-type machines and OS/2 multiple boot machines. Among the many commands, statements and functions in 4DOS and lacking in DOS/Windows 95–98 COMMAND.COM are reading keyboard input and a simpler method of ...
IBM DOS 4.0 supports Lotus-Intel-Microsoft EMS 4.0 on IBM's Expanded Memory Adapter, and is the first MS-DOS/PC DOS version that is "EMS-aware" and can use the EMS memory when it is available. [115] DOS 4 supports hard disk partitions over 32 MB, up to 1024 MB. [355]
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.
Negotiations to make PC/GEOS an integral part of PC DOS 7.0 failed. GeoWorks attempted to get third-party developers but was unable to get much support due to expense of the developer kit, which cost $1,000 for the manuals only, and the difficult programming environment, which required a second PC networked via serial port to run the debugger.
Concerns were shown by advocates and other critics for Windows 10's privacy policies and its collection and use of customer data. [44] Under the default "Express" settings, Windows 10 is configured to send various information to Microsoft and other parties, including the collection of user contacts, calendar data, computer's appearance including color of the chassis and "associated input data ...
Virtual DOS machines can operate either exclusively through typical software emulation methods (e.g. dynamic recompilation) or can rely on the virtual 8086 mode of the Intel 80386 processor, which allows real mode 8086 software to run in a controlled environment by catching all operations which involve accessing protected hardware and forwarding them to the normal operating system (as exceptions).