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User Guide

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unavailable and BIOS is unable to boot the payload.
• PCI
o BIOS assigns PCI bus numbers in a depth-first hierarchy, in accordance with
the PCI Local Bus Specification, Revision 2.2. The bus number is incremented
when BIOS locates a bridge device that is not part of the chipset. Scanning
continues on the secondary side of the bridge until all subordinate buses are
assigned numbers. PCI bus number assignments may vary from boot to boot
with varying presence of PCI devices with PCI-PCI bridges. If a device with a
bridge with a single bus behind it is inserted into a PCI bus, all subsequent
PCI bus numbers below the current bus are increased by one.
The bus assignments occur once, early in the BIOS boot process, and never
change during the pre-boot phase.
• USB
o Rapid Boot BIOS will enable the USB controller but will not do device
initialization.
o Once the Intel Rapid Boot BIOS has enabled the controller, the OS USB stack
should be able to detect, initialize and use USB devices.
• ATA
o The Intel Rapid Boot BIOS will enable the ATA controller but will not do device
initialization.
o Once the Intel Rapid Boot BIOS has enabled the controller, the Operating
System ATA stack should be able to detect, initialize and use USB devices.
• ACPI support
o The BIOS supports both ACPI 2.0 and 1.0b tables. The Intel Rapid Bios will
not support non-ACPI-EFI-Aware Operating systems. The Intel Rapid Boot
BIOS will not be supporting any sleep states.
o The patched eLilo Boot Loader, included in this toolkit, will extract the ACPI
RSD pointer using EFI calls and publish it in the within the range of 0xe0000
to 0xfffff.
• Rolling BIOS support (on Intel Server Boards S5000AL and S5000SL)
o All Intel server boards and systems that use the Intel 5000 sequence chipset
have 4 MB of flash space for system BIOS. This flash is divided into 2 banks
of 2 MB each.
o The Rolling BIOS feature provides the ability to update the BIOS in a fault
tolerant way. If the updated (new) BIOS is found to be non functional for any
reason, the system can still be booted by rolling back to the previous, healthy
BIOS.
Ref# D96629-001 Intel
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Rapid Boot Toolkit User Guide 11