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196
Checkpoint
Beep Code
Code
B0h
B1h
B2h
B4h
B5h
B6h
B7h
B9h
BAh
BCh
BDh
Appendix D: BIOS POST Checkpoint Codes
Description
Check for errors
If (errors were found)
beep twice
display "F1 or F2" message
if (F2 keystroke) go to SETUP
if (F1 keystroke) go to BOOT
Inform RomPilot about the end of POST.
Change status bits in CMOS and/or the BIOS
data area to reflect the fact that POST is
complete.
One quick beep.
Turn off <Esc> and <F2> key checking.
IF (VGA adapter is present)
IF (OEM screen is still up)
Note OEM screen is gone.
Fade out OEM screen.
Reset video: clear screen, reset cursor,
reload
DAC.
ENDIF
ENDIF
If password on boot is enabled, a call is
made to Setup to check password. If the
user does not enter a valid password, Setup
does not return.
Initialize ACPI BIOS.
Clear all screen graphics before booting.
Initialize the SMBios header and sub-struc-
tures.
Clear parity-error latch.
Display Boot First menu if MultiBoot is
intstalled.
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