IBM Personal Computer XT Manual To Operations page 241

Switch Setting Charts
System Board Switch Settings
The switches on the system board are set as shown in
the following figure. These settings are necessary for the
system to address the attached components, and to
specify the amount of memory installed on the system
board.
WARNING: Before you change any switch settings,
make a note of how the switches are
presently set.
I
Switch
Block
Switch Function
1 Normal operation must be Off
2 Coprocessor.
3-4 Amount of memory on the system board.
5-6 Type of display you are using.
7-8 Number of 5
i,4
inch diskette drives installed.
System Board Memory Switch Settings
The following figure shows the settings for switches 3
and 4 for the amount of memory on the system board.
128K
IDO~~DODD
192K
tDO~QD
DOD
256K
tDO~QDDOD
April 1983
©
Copyright IBM Corp. 1983
Switch Settings 4-5