10.3
Boot device selection
The order in which the PC BIOS searches for a bootable medium is pre-configured but may be
altered by the operator using the
Boot
setup menu. When the order is changed using this menu
it will be retained in non-volatile memory so that the order is maintained after a restart. It is also
possible to specify a one-time override of the boot device when the board starts, by pressing the
<ESC> key. This will result in a pop-up menu appearing. The appropriate boot device may be
selected from a list by using the cursor keys and pressing <ENTER>, but this is not retained in
non-volatile memory, so the correct device must be re-selected if necessary at a subsequent
restart.
NOTE
When the <ESC> key is pressed, a few seconds may elapse before the boot
device selection menu appears. The PC BIOS will always run BIOS Extensions
for any PMC modules it detects before responding to the keypress.
The on-board PMC Sites and Ethernet channels require their BIOS Extension firmware to be
enabled before they can be used as boot devices. BIOS setup options are provided to control
whether or not the board runs the BIOS Extensions for the Ethernet channels or the on-board
PMC sites. The
Option ROM Scan
field of the appropriate device menu must be used to
enable or disable the BIOS Extension. The device menus are accessible from:
Ethernet channel 0
Advanced | PCI Device Configuration | Ethernet Channel 0
Ethernet channel 1
Advanced | PCI Device Configuration | Ethernet Channel 1
On-board PMC site 1
Advanced | PCI Device Configuration | PMC Site 1
On-board PMC site 2
Advanced | PCI Device Configuration | PMC Site 2
Booting via the Ethernet channels can use either the Pre-Boot Execution (PXE) protocol, or
BOOTP/TFTP protocol. By default PXE is used, but this may be changed using the setup option
for
Main | Boot Options | Network Book Protocol
. Further information on PXE can
be obtained from the Intel web site at
http://developer.intel.com
. Further information
on BOOTP/TFTP can be obtained from the Etherboot web site at
http://etherboot.sourceforge.net
.
NOTE
The BIOS has limited space available for Extension ROMs. If a PMC module
containing extension firmware is fitted to the board, it may be necessary to disable
one or more of the on-board firmware extensions before the PMC firmware can be
loaded.
10-4
PP 110/01x
PC BIOS
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