A.2 HPM Jumpers

Table A–2 lists hierarchical switch power manager (HPM) jumpers and their functions. The HPM module has three 2-position jumpers, none of which are normally installed.

Table A–2 HPM Jumpers

Jumper

Function, When Installed

J2

Flash_Write_Inhibit. Prevents the hardware from writing to

 

flash memory.

J3

Force_FSL. Causes the firmware to remain in the fail-safe

 

loader code after HPM reset.

J4

HS_CSB_ID0. Sets ID0 of the microprocessor’s CSB address

 

field to a 1.

 

 

A.3 Standard I/O Module Jumpers

Table A–3 lists standard I/O module jumpers and their functions. The jumper station is three-pronged and the installed position is indicated by a silkscreen connection.

Table A–3 Standard I/O Module Jumpers

Jumper

Function, When Installed

J12

Forces SRM console defaults.

J13

Forces COM1 bypass.

J17

SCM remains in fail-safe loader code upon reset.

J18

Forces the SCM defaults.

 

 

A-2 AlphaServer GS80/160/320 User’s Guide

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Compaq GS80, GS160 Table A-2 HPM Jumpers, Table A-3 Standard I/O Module Jumpers, Jumper Function, When Installed