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ZXDOS
This was a continuation of the ZX Uno project, with a bigger FPGA. It was developed by Antonio Villena, in 1028. Some of the cores were ported from the ZX Uno to the ZXDOS, and now it is also possible to run Spectrum Next’s core.
http://forofpga.es/viewforum.php?f=4
www.antoniovillena.es