BIOS

BIOS Post Codes

 

 

Post Code

Description

B0

Check for errors

B1

Inform RomPilot about the end of POST

B2

POST done − prepare to boot operating system

B4

One short beep

B5

Terminate QuietBoot (optional)

B6

Check password

B7

Initialize ACPI BIOS

B9

Prepare boot

BA

Initialize DMI parameters

BB

Initialize PnP option ROM’s

BC

Clear parity checkers

BD

Display multiboot menu

BE

Clear screen

BF

Check virus and backup reminders

C0

Try to boot with interrupt 19

C1

Initialize POST Error Manager (PEM)

C2

Initialize error logging

C3

Initialize error display function

C4

Initialize system error handler

C5

PnP dual CMOS (optional)

C6

Initialize notebook docking (optional)

C7

Initialize notebook docking late

C8

Motorola check (optional)

C9

Extended checksum (optional)

CA

Redirect Int 15h to enable remote keyboard

CB

Redirect Int 13 to Memory Technologies Devices such as ROM, RAM,

 

PCMCIA, and serial disk

CC

Redirect Int 10h to enable remote serial video

CD

Re−map I/O and memory for PCMCIA

CE

Initialize digitizer and dispaly messagea

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