Sun Microsystems Sun Fire V480, Administration Manual

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42 Sun Fire V480 Server Administration Guide • February 2002
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J1102 – Labeled “CS” on the PCI riser board, this jumper is used to select the boot
PROM device. In the default position with the shunt covering pins 1 and 2, the
system boots the OpenBoot flash PROM on the centerplane. In the other position,
the system boots by way of an optional debug device that populates the connector
at location J1101.
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J1103 – Labeled “Hi-Lo” on the PCI riser board, this jumper is reserved for future
use.
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J1104 – Labeled “WREN” on the PCI riser board, this jumper controls write
permissions for the system boot PROM. In the default position with the shunt
covering pins 1 and 2, the system boot PROM is write-enabled. Moving the shunt
to the other position prevents updating the PROM.
RSC Card Jumpers
The locations of jumpers on the RSC card are shown in
FIGURE 3-7
.
FIGURE 3-7
Hardware Jumpers on
RSC
Card
J0501
J0403
J0502