BIOS Initialization ESB2 BMC Core TPS
Revision 1.0
Intel order number E18291-001
146
14.3.4.3.3 Hot-plug Controller (HPC) Interface
The PCI Express Base Specification, Revision 1.1 standardizes the register level programmatic
interface of the PCI Express* hot-plug controllers. If the operating system supports this
specification and the HPCs comply with the specification, the BIOS-provided control methods
are not used.
One such control method is powering on/off the slot. The BIOS provides other control methods
that describe platform hardware. However, the operating system can control the power and the
other hot-plug elements directly.
14.3.5 PnP ISA
Although the platform does not support add-in ISA devices, some embedded Super I/O legacy
I/O devices require ISA resources. As needed, the BIOS assigns the following from the system
resource pool to the embedded PnP Super I/O devices:
Memory
I/O
Direct Memory Access (DMA) channels
IRQ
A BIOS Setup option controls the I/O address and interrupt assignment of Serial Port A and
Serial Port B. All other legacy addresses are fixed.
14.3.6 Keyboard / Mouse
The BIOS supports only USB keyboards and mice.
The system can boot without a keyboard or mouse attached. If present, the BIOS detects the
keyboard during POST and displays the message “Keyboard Detected” on the POST Screen.
14.3.7 Universal Serial Bus (USB)
14.3.7.1 Native USB Support
The BIOS initializes and configures the USB subsystem during POST 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:
USB Specification compliant keyboards
USB Specification compliant mice
USB Specification compliant storage devices utilizing the bulk-only transport mechanism
USB devices are scanned to determine if they are required for booting.
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