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initialized, control is transferred to the INT 19h Bootstrap Loader, to load the available
operating system on the disk. During the POST period, a value form 00h through FFh is
written to the manufacturing test port (generally is I/O port 80h). These values are known as
POST Diagnostic Codes. (refer to appendix in detail)
SPLASH SCREEN
POST Logo: N/A
HOT KEY OPTIONS
Hot keys should be accepted during POST. The following Hot Keys are required at boot time.
DEL => Enter BIOS setup utility.
F7 =>Popup boot menu. The user will be presented with a list of boot options that they may
select a device to boot from (i.e., override the existing boot list for that particular boot).
BIOS WARNING EVENT LIST
Event
Warning Message
POST Memory not detect
Three long beep code
POST CPU fan rpm not detect
Show Message “WARNING: CPU FAN Not Found. Continue after 10 seconds.”
BIOS SETUP UTILITY
During POST, the end user can press <DEL> to enter Setup and change the system parameters
originally specified in the BIOS defaults. The Setup items are described in BIOS Setup Specification.
BIOS Setup Specification for detail.
POWER MANAGEMENT
ACPI (ADVANCED CONFIGURATION AND POWER INTERFACE)
Overview
ACPI 2.0 or later compatibility.
System support Full on state (S0), Suspend to RAM (STR - S3), Hibernation/Suspend to Disk (STD -
S4), Soft Off (S5)
System Power States and Wakeup Event Resource
S3
S4
S5
DeepSleep Enabled in S4-S5
USB Keyboard/Mouse
Yes
No
No
No
RTC
Yes
Yes
Yes
Yes
Wake on LAN (WOL)
Yes
Yes
Yes
No
Power Button
Yes
Yes
Yes
Yes
PS2 Keyboard/Mouse
Yes
No
No
No
