help id a chip

[william degnan]

Can someone tell me what chip this is?

http://vintagecomputer.net/pictures/2017/Objects/P1010114.JPG
http://vintagecomputer.net/pictures/2017/Objects/P1010093.JPG
http://vintagecomputer.net/pictures/2017/Objects/P1010094.JPG

(note ..94/94 show the item in a sealed in storage material)

the underside consists of 4 sets of 12 pins plus the corner 3 pins, as
shown on the top of the chip.

thanks