BetaWiki:Featured article/2023-12
The Windows NT 3.1 April 1991 build is an otherwise unidentified early build of Windows NT 3.1, which is currently the earliest available build of Windows NT overall. Disk images labeled "WOW Reversi MIPS Demo" that contain ZIP archives with the build's files were added to the PCjs miscellaneous diskette repository on 4 November 2023 by Jeff Parsons, the developer of the PCjs website and a former Microsoft employee.
The available copy of this build is compiled for an early version of the Microsoft Jazz architecture that predates the launch of the MIPS R4000 processor. As such, it actually targets the earlier R3000 processor, which is not fully compatible with the R4000. The build was used for an internal demonstration of Reversi running under Windows on Windows and x86 emulation on a MIPS machine during a weekly "Thursday Beers" event, in which Reversi displayed square pieces rather than round due to the GDI's inability to draw circles or curves. The primitives supported by this build's GDI only include lines, rectangles and text. Furthermore, only solid color brushes are implemented in the build.