Bios Overview; Introduction; Bios Flash Memory Organization; Resource Configuration - Intel D845GRG Using Manual

3 BIOS Overview

3.1 Introduction

The Desktop Boards use an Intel/AMI BIOS
be updated using a disk-based program. The FWH contains the BIOS Setup program, POST, the
PCI auto-configuration utility, and Plug and Play support.
The BIOS displays a message during POST identifying the type of BIOS and a revision code. The
initial production BIOSs are identified as RG84510.86A.
When the Desktop Board's jumper is set to configuration mode and the computer is powered-up,
the BIOS compares the CPU version and the microcode version in the BIOS and reports if the two
match.
For information about
The Desktop Boards' compliance level with Plug and Play

3.2 BIOS Flash Memory Organization

The Firmware Hub (FWH) includes a 4 Mbit (512 KB) symmetrical flash memory device.
Internally, the device is grouped into eight 64-KB blocks that are individually erasable, lockable,
and unlockable.

3.3 Resource Configuration

3.3.1 PCI Autoconfiguration

The BIOS can automatically configure PCI devices. PCI devices may be onboard or add-in cards.
Autoconfiguration lets a user insert or remove PCI cards without having to configure the system.
When a user turns on the system after adding a PCI card, the BIOS automatically configures
interrupts, the I/O space, and other system resources. Any interrupts set to Available in Setup are
considered to be available for use by the add-in card. Autoconfiguration information is stored in
ESCD format.
For information about the versions of PCI and Plug and Play supported by the BIOS, see
Section 1.4.
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Some Desktop Boards may use a different BIOS core. For more information, refer to the Product
Supplement Document for your Desktop Board.
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that is stored in the Firmware Hub (FWH) and can
Refer to
Section 1.4, page 13
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