Memory Expansion Board - NCR PC4i Owner's Manual

OPTIONS INSTALLATION
If you are installing the additional memory to the MPB, you may need
to remove boards to get to the chip sockets and switches. Refer to the
cabinet removal section for instructions to remove the card rack
assembly.

Memory Expansion Board

If you are adding the memory chips to the expansion board, you need
to set the switches on that board (see Figure 3-22). The settings shown
assume that the MPB memory totals 256 KB and the additional
memory chips have been installed on an expansion board. The chip
socket locations are shown in Figure 3-23.
3-20
OWNER'S MANUAL