American Megatrends Excalibur PCI User Manual page 21

Step 1 Set Switches and Jumpers,
Switch SW1
SW1 is an eight-position DIP switch that controls CPU speed, the Pentium internal caching algorithm, flash ROM
programming, diagnostic testing, synchronous SCSI, and the SCSI mode. See the graphic on page 19 for the location of
SW1. Switch positions 7 and 8 are unused.
SW1 Switch 1 Pentium Frequency
SW1 switch 1 controls the Pentium CPU frequency.
SW1 Switch 2 Pentium Internal Caching Algorithm
Switch position 2 controls the type of caching algorithm used internally by the Pentium CPU.
SW1 Switch 3 Reprogram Flash ROM
Set SW1 switch 3 ON only when American Megatrends has sent you a floppy disk with a new ROM file to
reprogram the Flash EPROM.
Excalibur PCI Pentium ISA Motherboard User's Guide
Continued
Frequency
66 MHz
60 MHz (Factory setting)
Caching Algorithm
Write-back (factory setting)
Write-through
CPU
Reprogram the Flash ROM from floppy disk.
Normal operation (Factory setting)
Switch 1
ON
OFF
Switch 2
OFF
ON
SW1 Switch 3
ON
OFF
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