Chapter 2 - System BIOS
2-1
IBC 2600 User’s Guide
BIOS OPERATION
Sections 3 through 7 of this manual describe the operation of the Ameri-
can Megatrends Hi-Flex AMIBIOS and the AMIBIOS Setup Utility. Refer
to
Running AMIBIOS
Setup later in this section for standard Setup
screens, options and defaults. The available Setup screens, options and
defaults may vary if you have a custom BIOS.
When the system is powered on, AMIBIOS performs the Power-On Self
Test (POST) routines. These routines are divided into two phases:
1.
System Test and Initialization.
Test and initialize system
boards for normal operations.
2.
System Configuration Verification
. Compare defined
configuration with hardware actually installed.
If an error is encountered during the diagnostic tests, the error is reported
in one of two different ways. If the error occurs before the display device
is initialized, a series of beeps is transmitted. If the error occurs after the
display device is initialized, the error message is displayed on the
screen. See BIOS Errors later in this section for more information on er-
ror handling.
The following are some of the Power-On Self Tests (POST’s) which are
performed when the system is powered on:
S
CMOS Checksum Calculation
S
Keyboard Controller Test
S
CMOS Shutdown Register Test
S
8254 Timer Test
S
Memory Refresh Test
S
Display Memory Read/Write Test
S
Display Type Verification
S
Entering Protected Mode
S
Memory Size Calculation
S
Conventional and Extended Memory Test
S
DMA Controller Tests
S
Keyboard Test
S
System Configuration Verification and Setup
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