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3.2
Flash PROM Jumpers
The Ultra 60 system uses flash PROMs (programmable read-only memory). Flash
PROMs enable:
Reprogramming of specific code blocks
Remote reprogramming of the PROM chip by a system administrator over a local
area network
The default shunt setting of J2703 is on pins 1 and 2 (write protect). This disables
the flash PROM chip from being reprogrammed. Placing the shunt on pins 2 and 3
(write enable) enables reprogramming of the flash PROM chip.
Note – After reprogramming your system flash PROM, make sure you return the
flash PROM write protect/enable jumper (J2703) to the write protect position to
increase system security.
TABLE 3-2
Jumper
J2703
J2804
3-4
Sun Ultra 60 Reference Manual • August 2001
Flash PROM Jumper Settings
Pins 1 + 2 Select
Pins 2 + 3 Select
Write protect
Write enable
High half booting
Normal booting
Default Jumper
on Pins
Name
1 + 2
Write protect/
write enable
2 + 3
Boot control
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