Table A-36 Configuration Jumper Settings; Table A-37 Configuration Of Jumpers - Silicon Graphics 1450 Maintenance Manual

A: Technical Reference
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Table A-36 identifies jumpers JP1, JP2, JP3, and JP4.
Table A-36 Configuration Jumper Settings
Callout Name
JP1 BMC boot block write
Enable
JP2 BIOS recovery boot
JP3 Password clear
JP4 CMOS clear
Table A-37 describes the jumper settings for jumpers JP2, JP3, and JP4.
Table A-37 Configuration of Jumpers
Option Description
CMOS 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 at the same time 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.
Password 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
recovery flash 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 in the floppy drive.
State Location
Disable 13 - 14
Enable 14 - 15
Disable 9 - 10
Enable 10 - 11
Protect 5 - 6
Erase 6 - 7
BMC control 1 - 2
Force erase 2 - 3
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