Chapter 5 BIOS Setup
BA-2501 SERIES USER MANUAL
Page: 5-2
5.1 Introduction
The BA-2501 System uses an AMI (American Megatrends Incorporated) Aptio BIOS
that is stored in the Serial Peripheral Interface Flash Memory (SPI Flash) and can be
updated. The SPI Flash contains the built-in BIOS setup program, Power-On Self-Test
(POST), PCI auto-configuration utility, LAN EEPROM information, and Plug and
Play support.
Aptio is AMI’s BIOS firmware based on the UEFI (Unified Extensible Firmware
Interface) specifications and the Intel Platform Innovation Framework for EFI. The
UEFI specification defines an interface between the operating system and platform
firmware. The interface consists of data tables that contain platform-related
information, boot service calls, and runtime service calls that are available to the
operating system and its loader. These elements have combined to provide a standard
environment for booting the operating system and running pre-boot applications.
The diagram below shows the Extensible Firmware Interface’s location in the
software stack.
Figure 5-1. Extensible Firmware Interface Diagram
EFI BIOS provides an user interface that allows you to modify hardware
configuration, e.g. change the system date and time, enable/disable a system
component, determine bootable device priority, set up personal password, etc., which
is convenient for engineers to perform modifications and customize the computer
