American Megatrends Super Voyager VLB-III, User Manual, Page: 75 / 138

Super Voyager VLB-III ISA Motherboard User's Guide
65
Chapter 3
AMIBIOS 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). AMIBIOS
POST checkpoint codes are described in the AMIBIOS Technical Reference.
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).
AMIBIOS Error Reporting
The AMIBIOS performs diagnostic when the system is powered up. Error s
are reported in one of two ways:
If... Then...
the error occurs
before the
display device
is initialized,
a series of beeps sound.
Beep codes indicate that a
fatal error has occurred.
The AMIBIOS Beep Codes are
described on the next page.
the error occurs
after the
display device
is initialized,
the error message is
displayed. Displayed error
messages are explained
below. A prompt to press
<F1> can also appear.