Specifications

BIOS Initialization QSSC-S4R Technical Product Specification
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16.6.1 Native USB Support
During the power-on self test (POST), the BIOS initializes and configures the USB subsystem in accordance with
Chapter 14 of the
Extensible Firmware Interface Reference Specification, Version 1.1. The BIOS is capable of
initializing and using the following types of USB devices:
x USB Specification-compliant keyboards
x USB Specification-compliant mice
x USB Specification-compliant storage devices that utilize bulk-only transport mechanism
USB devices are scanned to determine if they are required for booting.
The BIOS supports USB 2.0 mode of operation, and as such supports USB 1.1 and USB 2.0 compliant devices and
host controllers.
During the pre-boot phase, the BIOS automatically supports the hot addition and hot removal of USB devices and a
short beep is emitted to indicate such an action. For example, if a USB device is hot plugged, the BIOS detects the
device insertion, initializes the device, and makes it available to the user. When the USB controller is initialized during
POST, it emits a short beep (on platforms with an on-board speaker) for each USB device plugged into the system as
they have just all been hot added.
Only on-board USB controllers are initialized by BIOS. This does not prevent the OS from supporting any available
USB controllers, including add-in cards.
16.6.2 Legacy USB Support
The BIOS supports PS/2 emulation of USB keyboards and mice. During POST, the BIOS initializes and configures the
root hub ports and then searches for a keyboard and/or a mouse on the USB hub and then enables them.
16.6.3 SAS Supprt
BIOS recommends to put SAS cards in dedicated SAS slot.
16.7 Removable Media Drives
The BIOS supports removable media devices in accordance with the Server Configurator Tool available at
http://serverconfigurator.intel.com/default.aspx
.
The BIOS supports booting from USB mass storage devices connected to the chassis USB port, such as a USB flash
drive device. The BIOS supports USB 2.0 media storage devices that are backward compatible to the USB 1.1
specification.
16.7.1 DIMM Thermal Management
The BIOS will always configure Closed Loop Thermal Throttling (CLTT).
The BIOS implements support for CLTT in conformance with the requirements indicated in the
Common Fan Speed
Control and Thermal Management Platform Architecture Specification (PAS).
16.8 PCI Express Hot Plug
The PCI Express Hot Plug has to provide following options to the user
x Addition of PCI Express adaptor while system is powered on
x Removal of PCI Express adaptor while system is powered on
x Replace of PCI Express adaptor (possibly a failed one) while system is powered on
The above features need Platform HW, BIOS and OS participation. BIOS shall support MSI HP mechanism for native
PCI Express hot plug totally handled by the OS hot plug driver as defined in the PCI Express base specification
revision 1.10a.
BIOS supports the ACPI GPE (General Purpose Events) based Hot Plug mechanism supported by the Boxboro
chipset. This support is required for performing hot-plug control for operating systems that do not support native hot
plug.
The platform flow is as follows: