IBM Personal Computer Manual To Operations page 249

Extender Card Switches
Set the switches on the Extender Card to reflect total
system memory.
Extender Card Switch Settings
1 2 3 4 1 2 3 4
16K to 64K 352K to 384K
~uuu~ ~u~~~
1 2 3 4 1 2 3 4
96K to 128K
416K to 448K
~~~~~ ~~~~~
1 2 3 4
1 2 3 4
160K to 192K
480K to 512K
~~~~~
~~uu~
1 2 3 4
1 2 3 4
224K to 256K
544K to 516K
~~~~~
~·~uu~
1 2 3 4
1 2 3 4
288K to 320K 608K to 640K
~~~~~
~~u~u
Switch
Settings
5-31