A quick VGA-only test:
Sharp MZ-80A and MZ-80K: Screen looks good. The keyboard reacts to a few keys, but not as it should (it results in different characters on the screen than those you pressed).
Robotron KC 87 (Z 9001): interestingly, on my old CRT screen there is some graphic problem on the top that Gábor's screen does not show.
After resetting, the screen correctly scrolls upwards into position, just like on the real machine.
@Gehstock: sorry that I completely missed the last PM you sent me (I was busy with other stuff), but fortunately other members were able to fill in.
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