Может и баян...
http://mirrow.com/FPGApple/DE1_ZX исходники
Цитата...
New soft ZX Spectrum.
The ZX directory on my MMC card is for running on my DE1 version of a Sinclair Spectrum.I am probably not going to develop it any further but the source is available here( тут ссылко).It is a full Spectrum 128 including the sound and capable of loading "snapshot" files available on the web.
Оригинальный урл
http://mirrow.com/FPGApple/revisited.html