IBM 3270 Hardware User's Manual page 77

Setting Switches for the Memory Cards
If You
Add:
64KB*
128KB*
192KB*
256KB*
320KB*
In any of these booklets, ignore any instructions
for setting switches on your system board. These
switch settings for your 3270 PC are set correctly (
by IBM. You must set the switch on the memory
~
card to match the settings in this table:
Set the Switches
By Installing These
on the Cards to:
Memory Cards: 12345678
64/256KB Option with 64KB 10111000
installed
64/256KB Option with 128KB 10110100
installed
128KB Memory-Printer Adapter 0101
64/256KB Option with 192KB 10110010
installed
128KB Memory-Printer Adapter 0101
+
64/256KB Option with 64KB
installed 10011000
64/256KB Option with 256KB 10110001
installed
128KB Memory-Printer Adapter 0101
+
64/256KB Adapter with 128KB
installed 10010100
128KB Memory-Printer Adapter
0101
+
64/256KB Option with 192KB
installed 10010010
64/256KB Option with 256KB
10110001
installed
+
64/256KB Option with 64KB 01111000
installed
2-60 Book 1 - 3270 PC Work Station User's Guide