Acer AB460 F1 - Manual (Page 607)

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BIOS POST Codes
This section lists the POST (Power-On Self-Test) codes for the AMI BIOS.
POST codes are divided into two categories: recoverable and terminal.
Recoverable POST Errors
When a recoverable type of error occurs during POST, the BIOS will
display an POST code that describes the problem. BIOS may also issue
one of the following beep codes:
• One long and two short beeps – video configuration error
• One repetitive long beep – no memory detected
Terminal POST Errors
If a terminal type of error occurs, BIOS will shut down the system.
Before doing so, BIOS will write the error to
port 80h , attempt to
initialize video and write the error in the top left corner of the screen.
The following is a list of codes that may be written to port 80h .
Post Code Description
02h Verify Real Mode
03h Disable Non-Maskable Interrupt (NMI)
04h Get CPU type
06h Initialize system hardware
07h Disable shadow and execute code from the ROM.
08h Initialize chipset with initial POST values
09h Set IN POST flag
0Ah Initialize CPU registers
0Bh Enable CPU cache
0Ch Initialize caches to initial POST values