IBM Personal Computer

Switch Block 2
Switch
Function
1,2,3,4,5
Amount of memory options installed
6,7,8
Always in the Off position
Note: The system board must
be fully populated,
256KB of memory, before a memory expansion
option can be installed.
Coprocessor
Switch 2 is set to indicate if the coprocessor is installed.
Switch Block 1 Switch Block 2
With Math Coprocessor
~DQDDDDDD ~DODDDQQQ ~
Without Math CII::;ucessor
~~DDDDDD ~ODDDQQQ
5-34 Switch Settings