I'd not heard of this before.
http://www.gr8bit.ru/what_is_gr8bit.html
The website is a little messy but the machine does seem to be
comprehensively documented.
It is a nice machine!!! But too expensive for me :o( Do you know you can
build it for a lot less at home? :o)
I'd be more interested if it was
Spectrum-compatible, myself. ;-)
There are all-ttl-spectrum-compatibles to be built :o)