[dexter1]

Hey Jan-Jaap,

I believe we have had this topic on Nekochan forum a while ago. But if the GT boardset is generally okay, we need to find an IP4.
From Alex Corda's FAQ you need a 12.5 MHz R2000. But i guess you aren't picky and would be happy with anything.

I remember several years ago the shop VT100 in The Hague, who had a blue-hat twin-tower in the window of the store. No idea where that critter went. Also, no idea where that shop went as well They had some groovy vintage stuff.

From Gerhard's site this snippet is interesting: "Apparently Clover 1 graphics subsystems were common on 4D/50, 4D/60 and 4D/70 systems while Clover 2 was usually found in the newer 4D/70, 4D/80 and 4D/85."
So this seems to indicate that the GT was delivered with newer 4D/70 systems, and therefore your assesment of a PROM version difference seems plausible.

Any luck with memory tests on the GT diagnostics port?