What is this chip?

Weren't they those glue logic devices that combined EPROM, RAM and a PLD to save a few devices back in the days of standalone microprocessors? IIRC the development kit cost 1 arm, 1 leg and 1 nod of the head, and the devices a little more than the stuff they replaced, which rather restricted their spread.

Paul Burke

And here's a data sheet:

Thank you all for the assistance. I was planning on trying to use it but if the developers kit is so outdated (and expensive) then I will probably just go for something a little simpler.