American Megatrends Excalibur PCI, User Manual

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Excalibur PCI Pentium ISA Motherboard User's Guide
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Chapter 5
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
ISA and EISA Hi-Flex 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.