[comp.sys.ibm.pc.hardware] Needed: PAL chip for Compaq Portable 640K on motherboard

gwni@troi.cc.rochester.edu (G. Wayne Nichols) (06/18/91)

I still have one of the original Compaq Portables,
and would like to install 640K directly on the motherboard.
I bellieve that, in addition to replacing the 4164 memory chips with
41256s, I also need a different PAL chip to address the memory.

Anybody know exactly what I need/where to get it?
Thanks.