IBM PC/XT Motherboard Switch Settings: Display Adapter PSS ID Number: Q34192 Article last modified on 09-23-1991 PSS database name: PSS
Summary:
The IBM PC/XT series of computers have switches on the motherboard to determine the system configuration. If these switches are set incorrectly, erratic errors can result.
More Information:
The display adapter installed in the system is indicated by the setting of switches 5 and 6 on Switch Block 1 as follows:
Display Adapter Switch Block 1
-------------------
: 1 2 3 4 5 6 7 8 :
: : on
IBM Monochrome/Hercules : :
: :
: x x : off
-------------------
-------------------
: 1 2 3 4 5 6 7 8 :
: x : on
CGA (40 Column) : :
: :
: x : off
-------------------
-------------------
: 1 2 3 4 5 6 7 8 :
: x : on
CGA (80 Column) : :
: :
: x : off
-------------------
-------------------
: 1 2 3 4 5 6 7 8 :
: x x : on
EGA/VGA : :
: :
: : off
-------------------
Copyright Microsoft Corporation 1991.
