About Flash Prom Jumpers - Sun Microsystems Enterprise 250 Owner's Manual

About Flash PROM Jumpers

The system uses flash PROMs to permit the reprogramming of specific code blocks
that are held in non-volatile system memory, and to permit remote reprogramming
of that code by an authorized system administrator over a local area network.
Three jumpers on the main logic board affect flash PROM operation. The figure
below shows the jumper locations, and the table describes their function.
J2604 J2605
Shunt on
Jumper Pins 1 + 2 Selects
J2702 Flash PROM
J2704 Write Protect
J2804 High Half Booting
Default
Shunt on Shunt
Pins 2 + 3 Selects on Pins
Not To Be Used 1 + 2
Write Enable 2 + 3
Normal Booting 2 + 3
Chapter 4
Flash PROM
jumpers
Hardware Configuration 65