EightyOne – an emulator for the range of ZX home computers made by Sinclair Research (and their clones) in the 1980s, primarily the ZX80 and ZX81 but also includes the ZX Spectrum models. As well as emulating the machines themselves, various add-on interfaces are supported, including storage devices, hi-res graphics, custom character sets, sound and colour cards.
EightyOne was created by Michael D Wynne. Michael is no longer actively developing the emulator, but has made the code open source so that others can continue to extend it with new functionality. This archive collates as many of the original release versions of the emulator as possible, including the source code for them where available. Versions up to 1.0a were produced by Michael, with all later versions created by others.