Support for 16-color VGA graphics, EMS memory, and new capabilities of the i386 CPU in some versions were also added.
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It has also introduced desktop icons, keyboard shortcuts, and the terminology "minimize" and "maximize", as opposed to "iconize" and "zoom" which was used in Windows 1.0. Unlike its predecessor, Windows 2.0 allows user to overlap and resize application windows. Microsoft ended its support for Windows 2.0 on December 31, 2001. This was remedied in version 3.0, which is compatible with Virtual Control Program Interface (VCPI) in "standard mode" and with DOS Protected Mode Interface (DPMI) in "386 enhanced" mode. Neither of these versions worked with DOS memory managers like CEMM or QEMM or with DOS extenders, which have their own extended memory management and run in protected mode as well.
There was no support for disk-based virtual memory, so multiple DOS programs had to fit inside the available physical memory therefore, Microsoft suggested buying additional memory and cards if necessary. Windows/386 also provided EMS emulation, using the memory management features of the i386 to make RAM beyond 640k behave like the banked memory previously only supplied by add-in cards and used by popular DOS applications. Windows/386 ran Windows applications in a single Virtual 8086 box, with EMS emulation. With the exception of a few kilobytes of overhead, each DOS application could use any available low memory before Windows was started. The variant had fully preemptive multitasking, : p.2 and allowed several MS-DOS programs to run in parallel in "virtual 8086" CPU mode, rather than always suspending background applications. It introduced a protected mode kernel, above which the GUI and applications run as a virtual 8086 mode task. It was much more advanced than its other sibling. The other variant, Windows/386 was available as early as September 1987, pre-dating the release of Windows 2.0 in December 1987.
IBM's PS/2 Model 25, which had an option to ship with a "DOS 4.00 and Windows kit" for educational markets, shipped Windows with 8086 hardware. Despite its name, the variant was fully operational on an 8088 or 8086 processor, although the high memory area would not be available on an 8086-class processor however, expanded memory could still be used. It would be later renamed to Windows/286 with the release of Windows 2.1 in 1988. The basic edition supported the 8086 mode of the 80386 microprocessor. The operating environment, codenamed Nixa, came in two different variants with different names and CPU support. The operating environment was succeeded by Windows 2.1 in May 1988, while Microsoft ended its support on December 31, 2001. had filed a lawsuit against Microsoft in March 1988 after accusing them of violating copyrights Apple held, although in the end, the judge ruled in favor of Microsoft.
Due to the introduction of overlapping windows, Apple Inc. Noted as an improvement of its predecessor, Microsoft Windows gained more sales and popularity after its release, although it is also considered to be the incarnation that remained a work in progress. It also introduced Microsoft Word and Excel, and integrated the Control Panel, while the developer support increased substantially. Windows 2.0 differs from its predecessor by allowing users to overlap and resize application windows, and the operating environment also introduced desktop icons, keyboard shortcuts, and support for 16-color VGA graphics. It was released to manufacturing on December 9, 1987, as a successor to Windows 1.0.Ĭodenamed Nixa, the product includes two different variants, a base edition for 8086 real mode, and Windows/386, an enhanced edition for i386 protected mode. Windows 2.0 is a major release of Microsoft Windows, a family of graphical operating systems for personal computers developed by Microsoft.