I used KM41464AP-12, but there are other chips of the same kind that should work.
[[File:Ram-cpc-plus-KM41464AP-12.png|thumbnailframed|center]]
'''2) Solder them both piggy back on the existing ram chips, except for the NCAS signal (pin 16)'''
[[File:Piggy-backing-ram-pin16.png|thumbnailframed|center]]