Compaq AlphaServer 160 Guía de usuario Pagina 172

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A-2 AlphaServer GS80/160/320 User’s Guide
A.2 HPM Jumpers
Table A2 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 A2 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 A3 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 A3 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.
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