HP dc71xx Manuel D’Utilisation

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8-2
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Technical Reference Guide
BIOS ROM
This chapter includes the following topics:
ROM flashing  (8.2), page 8-2
Boot functions (8.3), page 8-3
Setup utility (8.4) , page 8-6
Client management functions (8.5), page 8-17
PnP support (8.6) , page 8-19
USB legacy support (8.7), page 8-20
8.2 ROM 
Flashing 
The system BIOS firmware is contained in a flash ROM device that can be re-written with BIOS 
code (using the ROMPAQ utility or a remote flash program) allowing easy upgrading, including 
changing the splash screen displayed during the POST routine.  
8.2.1 Upgrading
Upgrading the BIOS is not normally required but may be necessary if changes are made to the 
unit's operating system, hard drive, or processor. All BIOS ROM upgrades are available directly 
from HP. Flashing is done either locally with the HP-provided Windows program, a ROMPaq 
diskette or remotely using the network boot function (described in the section 8.3.2).    
This system includes 64 KB of write-protected boot block ROM that provides a way to recover 
from a failed flashing of the system BIOS ROM. If the BIOS ROM fails the flash check, the boot 
block code provides the minimum amount of support necessary to allow booting the system from 
the diskette drive and re-flashing the system ROM with a ROMPAQ diskette. Note that if an 
administrator password has been set in the system the boot block will prompt for this password 
by illuminating the caps lock keyboard LED and displaying a message if video support is 
available. A PS/2 keyboard must be used during bootblock operation.
Since video may not be available during the initial boot sequence the boot block routine uses the 
Num Lock, Caps Lock, and Scroll Lock LEDs of the PS/2 keyboard to communicate the status of 
the ROM flash as follows:
Table 8-1
Boot Block Codes
Num Lock LED
Cap Lock LED
Scroll Lock LED
Meaning
Off
On
Off
Administrator password required.
On
Off
Off
Boot failed. Reset required for retry.
Off
Off
On
Flash failed.
On
On
On
Flash complete.