Specifications

Chapter 3
25
3 Utilities
Boot Console Handler (BCH)
The boot console handler (BCH) is separate code in processor dependent code (PDC). It has two purposes:
• It lets the bootstrap code know which path to boot from
• It allows you to interact with PDC to view and/or modify a set of specific system parameters
Booting is accomplished in the standard PA RISC manner but may be transparent (depending on the state of
the autoflags [boot, search, and start)]. If the autoflags are clear and you override autobooting, a boot
sequence will end up in the interactive portion of BCH where modification and/or viewing of some system
parameters is possible.
NOTE When the autostart flag is off, autoboots will be interrupted if a configuration change occurs
which causes reduced performance; thus requiring you to intervene prior to booting to the
internal system loader (ISL).
The auto boot will halt at the BCH prompt and you may continue booting by entering boot.
BCH Commands
In the interactive portion of BCH there is a Main Menu and five submenus.
Main Menu
The following commands are available in the Main Menu:
Table 3-1 BCH Commands
Submenu Description
BOot [PRI
|ALT|<path>] Boot from a specified path
DIsplay Redisplay the current menu
HElp [<menu>
|<command.> Display help for specified command or menu
RESET Restart the system
MAin Return to the Main Menu
Table 3-2 Boot Paths
Boot Source Boot Path
Bottom disk (Slot 0) 0/1/1/0.0.0
Middle disk (Slot 1) 0/1/1/0.1.0
Top disk (Slot 2) 0/1/1/1.2.0
DVD 0/0/2/0.0.0