Solaris 7 Sun Hardware Platform Guide

Location of Flash PROM Jumpers in Sun Enterprise 450 System and the Ultra 450 Workstation

The flash PROM update procedure for the Sun Enterprise 450 and the Ultra 450 systems assumes that the write-protect/enable jumper was set in the default position (enabled). In order to update the flash PROM, you must move the write-protect/enable jumper to the write-enable position.

Three jumpers on the main logic board affect flash PROM operation. Figure 4-8 shows the jumper locations, and Table 4-6 describes their functions.

Figure 4-8 Flash PROM Jumpers on the Sun Enterprise 450 System and the Sun Ultra 450 Workstation

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Table 4-6 Sun Enterprose 450 and Ultra 450 Flash PROM Jumper Settings

Jumper 

Pins 1 + 2 Jumpered 

Pins 2 + 3 Jumpered 

Default on Pins 

Signal Controlled 

J3102 

Flash PROM 

Not to be used 

1 + 2 

FLASH PROM SEL 

J3103 

Write-protect 

Write-enable 

2 + 3 

FLASH PROM PROG ENABLE 

J5501 

High-half booting 

Low-half booting 

2 + 3 

XOR LOGIC SET 

Make sure that the write-protect/write-enable jumper is set to the write-enable position, pins 2 and 3 jumpered (see Figure 4-9). Pin 1 is noted by an asterisk (*).

Figure 4-9 Setting the J3103 Write Protect/Enable Jumper on the Sun Enterprise 450 or Ultra 450

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