IBM Personal Computer XT Manual To Operations page 293

Switch Setting Charts
System Board Switches
WARNING:
Before you change any switch settings, make a note
of how the switches are presently set.
Switch Block 1
~DDDDDDDD
Switch Function
1,7,8
Number of 5l,4 inch diskette drives installed
2 Coprocessor
3,4
System board memory switches
5,6 Type(s) of display(s) connected
Switch Block 2
Switch Function
1,2,3,4,5
Amount of memory options installed
6,7,8
Always in the Off position
April 1983
C0 Copyright IBM Corp. 1983
Switch Settings 29