Continuing my adventures with old laptops I have got a PC4502 running. Now I'm interested in the possible upgrades for the 4500 family.
There's aCE-451R memory board.
And aCE-451A CRT adaptor.
Does anyone have details, photos, diagrams, schematics or even the real thing? I'm expecting them to be rare as hens teeth, so I'll not get my hands on them. But with enough details maybe I can reverse engineer a replacement. The CRT adaptor being an add-on gives the possibility of better than CGA output.