Boot Console Handler; Overview Of The Boot Console Handler - HP 743 Service Handbook

Boot Console Handler

This section presents configuration capabilities of the Boot ROM, including:
Using the Boot Console Handler
Configuration Modes

Overview of the Boot Console Handler

The Boot ROM contains a micro-operating system called the Boot Console Handler
(BCH). The Boot Console Handler is used to:
• Boot an application (usually ISL) from a specific device.
• Provide limited ability for a user to enter and save various kinds of configuration
information in the EEPROMs.
• Display information about the hardware and firmware.
• Change/Configure automatic operations the Boot ROM code performs on boot.
• Locate hardware faults.
Most Boot Console Handler operations are performed by selecting actions or data values
from a menu. Select menu items by typing a one or two digit number, then pressing the
Enter/Return key, shown in step-by-step procedures as Enter.
The system can immediately perform simple configuration changes, such as changing the
value of a path. More comprehensive changes, such as changing the attributes of a mode,
require confirmation before they take effect, giving the user a chance to undo if necessary.
With the exceptions of the debugger environment and individual items in the system con-
figuration menu, all user input consists of typing a one or two digit number and pressing
the Enter key. In all menus, the names of the menu items and the prompt at the bottom of
the menu provide information on how to proceed.
Configuration
Boot Console Handler
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