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.