Download Sun Fire V490 Server Administration Guide

PCI Riser Board Jumpers
On the PCI riser board are three jumpers, two of which affect transactions with the
system Boot PROM and one of which is reserved for future use. FIGURE 3-6 illustrates
the locations of these three jumpers.
J1103
J1104
J1102
Hardware Jumpers on PCI Riser Board
FIGURE 3-6
The functions of the PCI riser board jumpers are shown in TABLE 3-3.
PCI Riser Board Jumper Functions
TABLE 3-3
Jumper
Shunt on Pins 1 + 2 Selects
Shunt on Pins 2 + 3 Selects
Default Setting
OpenBoot flash PROM
Optional debug device
populating connector in
position J1101
1+2
Reserved for future use
1+2
OpenBoot flash PROM
Write-protected
1+2
J1102
3 2
1
Reserved for future use
J1103
3
2
1
OpenBoot flash PROM
Write-enabled
J1104
3 2
36
1
Sun Fire V490 Server Administration Guide • October 2005