User manual

BIOS Setup
60
POST
Code
(Hex)
Name Description
A2h
KEYBOARD_TEST
Set NumLock indicator.
IF <keylock set> THEN
Print error message on screen.
ENDIF
A4h
KEY_RATE
Initialize keyboard typematic rate.
AAh
SCAN_FOR_F2
IF <2 key was pressed during POST>
THEN
Set flag indicating key press.
Display “Entering Setup” message.
ENDIF
ACh
SETUP_CHECK
IF <2 was pressed> THEN
Enter Setup.
ELSE IF <errors were found> THEN
Display “Press 7 or 2” prompt.
IF <2 is pressed> THEN
Enter Steup.
ELSE IF <7 is pressed> THEN
Boot.
ENDIF
ELSE
Boot.
ENDIF
AEh
CLEAR_BOOT
Clear CMOS bit indicating POST is in
progress.
B0h
ERROR_CHECK
IF <error were found> THEN
Beep twice.
Display “Press 7 or 2” message.
IF <2 is pressed> THEN
Enter Setup.
ELSE IF <7 is pressed> THEN
Boot.
ENDIF
ENDIF
B2h
POST_DONE
Change BIOS data ares flag to indicate
POST is complete.
B4h
ONE_BEEP
Beep once.
B5h
QUIETBOOT_END
Reset video:
Clear screen, reset cursor, reload DAC.
B8h
SYSTEM_INIT
Clear the GDT.
B9h
PREPARE_BOOT
Prepare to boot, clear the screen.
BAh
DMI
Initialize DMI header and substructures.
C0h
INT19
Do INT 19h to load OS.