Table of Contents
Advertisement
Intel Desktop Board YA810E Technical Product Specification
3.2 BIOS Flash Memory Organization
The Intel 82802AB 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. Figure 13 shows the organization of the flash memory.
The last two 8 KB blocks of the fault tolerance area are the parameter blocks. These blocks
contain data such as BIOS updates, vital product data (VPD), logo, System Management BIOS
(SMBIOS) interface, and extended system configuration data (ESCD) information. The backup
block contains a copy of the fault tolerance block.
080000
07FFFF
64 KB Block
070000
06FFFF
64 KB Block
060000
05FFFF
64 KB Block
050000
04FFFF
64 KB Block
040000
03FFFF
64 KB Block
030000
02FFFF
64 KB Block
020000
01FFFF
64 KB Block
010000
00FFFF
64 KB Block
000000
3.3 PCI IDE Support
If you select Auto in the BIOS Setup program, the BIOS automatically sets up the two
PCI IDE connectors with independent I/O channel support. The IDE interface supports hard drives
up to ATA/66 and recognizes any ATAPI devices, including CD-ROM drives, tape drives, ARMD
(ATA Removable Media Devices), and Ultra DMA drives (see Section 1.3 for the supported
version of ATAPI). The BIOS determines the capabilities of each drive and configures them to
optimize capacity and performance. To take advantage of the high capacities typically available
today, hard drives are automatically configured for Logical Block Addressing (LBA) and to
PIO Mode 3 or 4, depending on the capability of the drive. You can override the auto-
configuration options by specifying manual configuration in the BIOS Setup program.
To use ATA-66 features the following items are required:
•
An ATA-66 peripheral device
•
An ATA-66 compatible cable
•
ATA-66 operating system device drivers
70
7
Boot Block
6
5
4
Main System BIOS
3
2
1
Fault Tolerance
0
Backup
Figure 13. Memory Map of the Flash Memory Device
8 KB - Parameter Block 2
8 KB - Parameter Block 1
48 KB - Reserved
OM08376
Advertisement
Table of Contents
