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Table 67. Configuration of Jumpers
Option
CMOS
Password
Description
If pins 1 and 2 of J9F2 are jumpered (default), NVRAM contents are preserved through system reset unless the user clears them through the front panel (by pressing the Power and Reset buttons together for four seconds). If pins 2 and 3 of J9F2 are jumpered, NVRAM contents are set to manufacturing default during system reset. If the jumper is removed, NVRAM contents are preserved through system reset.
If pins 5 and 6 of J9F2 are jumpered (default), the current system password is maintained during system reset. If pins 6 and 7 are jumpered, the password is cleared on reset.
BIOS | If pins 9 and 10 of J9F2 are jumpered (default), BIOS jumps to a protected area of the flash |
Recovery | part containing the "Recovery BIOS." If the normal BIOS gets corrupted, and you are unable |
| to reload a fresh copy from the floppy disk, install the jumper between pins 10 and 11 of J9F2, |
| which enables the system to boot from the Recovery BIOS. This code expects a fresh copy of |
| the normal BIOS to be located on a floppy disk present in the floppy drive. |
Changing Jumper Settings
CAUTIONS
Electrostatic discharge (ESD) and ESD protection: ESD can damage disk drives, boards, and other parts. We recommend that you do all procedures in this chapter only at an
ESD and handling boards: Always handle boards carefully. They can be extremely sensitive to ESD. Hold boards only by their edges. After removing a board from its protective wrapper or from the system, place it
Installing or removing jumpers: A jumper is a small,
108 | SKA4 Baseboard Product Guide |