Sun Microsystems 280R manual About Flash Permanent Read Only Memory Prom Jumpers, J2103

About Flash Permanent Read Only Memory (PROM) Jumpers

The system uses flash PROM jumpers to permit the reprogramming and use of specific boot code blocks that are held in nonvolatile (NVRAM) system memory, and to permit remote reprogramming of that code by an authorized system administrator over a local area network.

One jumper on the main logic board controls flash PROM operation. The table below describes its function.

			Default
	Shunt on	Shunt on	Shunt	Signal
Jumper	Pins 1 + 2 Selects	Pins 2 + 3 Selects	on Pins	Controlled
J2103	Write protect	Write enable	1 + 2	FLASH PROM
				PROG ENABLE

Modifying the jumper setting should only be performed by a qualified service provider. For the location of the flash PROM jumper on the main logic board, and for configuration instructions, see the Sun Fire 280R Server Service Manual.

Note –The jumper setting on J2104 must remain on its factory-supplied setting (shunt on pins 1 and 2).

For information about how jumpers are marked on the main logic board with jumper addresses, see “About the Main Logic Board Jumpers” on page 112.

For more information about flash PROM programming, see the Sun Fire 280R Server Service Manual.

114 Sun Fire 280R Server Owner’s Guide • January 2001