History of Windows 2.1

Furthermore, two new versions were released, namely Windows/286 Windows/386 2.1 and 2.1. As with previous versions of Windows, Windows/286 using real-mode memory model, but it was the first version to support the High Memory Area (HMA). Windows/386 2.1 have the kernel running in protected mode with emulation Expanded Memory Specification (EMS) standard Lotus-Intel-Microsoft (LIM), the predecessor specification Extended Memory Specification (XMS) which would finally change in the topology of IBM PC computing. All Windows and DOS-based application when it is running in real mode, running over the protected mode kernel using virtual 8086 mode, which is a new feature that is owned by Intel 80386. 2:03 version 3.0 and later versions getting demands from Apple because the 2.1 version has the appearance of windows in cascade mode (stacked), in addition to several features of the Apple Macintosh operating system is "emulated" by Windows, the main problem is the display / look and feel. Judge William Schwarzer ended up canceling all 189 charges, except 9 lawsuit filed by Apple against Microsoft on January 5, 1989