Fsb Speed Configuration Setting (J3); Clear Cmos (Jbat1) - Shuttle Spacewalker MK20 User Manual

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FSB Speed Configuration Setting (J3)

MK20 provides jumper J3 to set front side bus at 100MHz and 133MHz. Insert
mini-jumper caps on J3 to set FSB to 100MHz. Remove mini-jumper caps from
J3 to set FSB to 133MHz.
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Clear CMOS (JBAT1)

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JBAT1 is used to clear CMOS data. Clearing CMOS will result in the perma-
nent erasing of previous system configuration settings and the restoration of
original (factory-default) system settings.
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Step 1. Turn off the system power (PC-> Off).
Step 2. Remove ATX Power cable from ATX Power connector.
Step 3. Remove jumper cap from JBAT1 pins 1-2.
Step 4. Place the jumper cap on JBAT1 pin 2-3 for a few seconds.
Step 5. Return the jumper cap to pin 1-2.
Step 6. Plug ATX Power cable into ATX Power connector.
Step 7. Turn on the system power (PC-> On).
Set FSB hardware jumper
to 100MHz. (Default)
Set FSB hardware jumper
to 133MHz.
Pin 1-2 (Default)
Pin 2-3 (Clear CMOS)
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