Excalibur PCI Pentium ISA Motherboard User's Guide
21
Step 1 Set Switches and Jumpers,
Continued
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.
Frequency
Switch 1
66 MHz
ON
60 MHz (Factory setting)
OFF
SW1 Switch 2 Pentium Internal Caching Algorithm
Switch position 2 controls the type of caching algorithm used internally by the Pentium CPU.
Caching Algorithm
Switch 2
Write-back (factory setting)
OFF
Write-through
ON
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.
CPU
SW1 Switch 3
Reprogram the Flash ROM from floppy disk.
ON
Normal operation (Factory setting)
OFF
Summary of Contents for Excalibur PCI
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Page 52: ...Chapter 5 AMIBIOS POST 48 ...
Page 60: ...Chapter 5 AMIBIOS POST 56 ...
Page 64: ...Chapter 6 WinBIOS Setup 60 ...
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