After my father died last year I was able to use the inheritance to upgrade my gaming rig. By which I mean just switching the batteries in his portable Cambridge Z88 computer from 1988 worked and it just turned on. I’m gonna see if I can convince it that the 80s are over and then see what kind of games I can run on it!
It does indeed have three slots for memory expansion at the front. Two of them are in use on this one, one 128k RAM and one 32k EPROM. If there is a UV light to erase them it has been lost.
The UV light box was a separate device and not part of the Z88 itself.
you'd put the EPROM devices in it and let them cook for 20 minutes or so to clean them of previous data written to them.