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USB Port
The USB (Universal Serial Bus) port is for attaching USB devices such as keyboard,
mouse, or other USB-compatible devices.
Debug LED
Please refer to the table below to get more information about the Debug LED message.
Post
Status
FF
Power on and first initialize CPU.
C0, C1, C2 Early CPU Initialize.
C4, C6
Initialize chipset.
D4, D5
Initialize memory.
08
Initialize keyboard.
2A, 31
Initialize onboard devices. Load Option ROM (VGA and RAID
option ROM) form BIOS to memory.
37
Displaying sign-on message, CPU information, setup key
message and any OEM specific information.
38
Initialize USB device and different devices.
3C
Mid POST initialization of chipset registers. Detect different
devices (parallel ports, serial ports and coprocessor in CPU...etc.)
75, 78
Initialize INT 13 devices and IPL devices. (include SATA/ PATA
HDD and CD/DVD ROM).
87
Enter setup screen. BIOS setup if needed/ requested.
A4
W ait for user input at configuration display if needed.
A7
Display the system configuration screen if enabled.
B1
Save system context for ACPI (Advanced Configuration and Power
Interface). Prepare give control to OS loader (INT 19H).
00
Pass control to OS Loader (typically INT 19H).
AA
Enter OS (Vista or W indows XP).
Hardware Setup
2-13
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