Chapter 3 Bios Power-On Self Test (Post); Post Phases; Bios Error Reporting; Beep Codes - American Megatrends Enterprise-II User Manual

Chapter 3
BIOS Power-On Self Test
AMIBIOS provides all IBM-standard POST
routines as well as enhanced AMIBIOS POST
routines and CPU internal diagnostics.
AMIBIOS POST codes can be accessed via the
Manufacturing Test Port (I/O Port 80h).

POST Phases

When the system is powered on, the AMIBIOS
executes POST, which has two phases:
• System Test and Initialization (test
and initialize motherboards for
normal operations), and
• System Configuration Verification
(compare defined configuration with
there hardware actually installed).

BIOS Error Reporting

AMIBIOS performs diagnostic when the
system is powered up. Errors are reported
in one of two different ways:
If...
the error occurs before the
display device is
initialized,
the error occurs after the
display device is
44
Then...
a series of beeps sound. Beep codes indicate
that a fatal error has occurred. AMIBIOS Beep
Codes are described on the next page.
the error message is displayed. Displayed
error messages are explained below. A prompt
Chapter 3 - BIOS POST