The development of DOSBox began around the launch of Windows 2000-a Windows NT system -when its creators, Dutch programmers Peter Veenstra and Sjoerd van der Berg, discovered that the operating system had dropped much of its support for DOS software.
MS-DOS continued to receive support until the end of 2001, and all support for any DOS-based Windows operating system ended on July 11, 2006. Although Windows XP could emulate DOS, it could not run many of its applications, as those applications ran only in real mode to directly access the computer's hardware, and Windows XP's protected mode prevented such direct access for security reasons. A member of the series is Windows XP, which debuted on October 25, 2001, to become the first consumer-oriented version of Windows to not use DOS. Conversely, the Windows NT operating systems were not based on DOS.
These versions of Windows could run DOS applications. Windows 3.0 and its updates were operating environments that ran on top of MS-DOS, and the Windows 9x series consisted of operating systems that were still based on MS-DOS. Before Windows XP, consumer-oriented versions of Windows were based on MS-DOS.
