- Pin 11 of the socket must be connected high (or to pin 12, or to a soft switch to enable video scanning on row E of RAM).
- Pin 11 of IC F2 must be disconnected and that line (not the IC pin) must be connected to ground instead (See my hand-drawn schematic).
It seems to have worked! The computer shows the APPLE ][ greeting just as expected. I need to connect a keyboard and a disk controller card to test it all out and verify that all 48K is being accessed.
So, I now have an Apple II with 48K of 4164 DRAM in just one bank of RAM. Now for 64K. Or 128K...
|2 banks of RAM installed for future 128K modifications|