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58
Code
Beeps / Description
Code
Beeps / Description
7Eh Initialize coprocessor if present
BAh
Initialize DMI parameters
80h Disable onboard Super I/O ports and
IRQs
BBh
Initialize PnP Option ROMs
81h Late POST device initialization
BCh
Clear parity checkers
82h Detect and install external RS232
ports
BDh
Display MultiBoot menu
83h Configure non-MCD IDE controllers
BEh
Clear screen (optional)
84h Detect and install external parallel
ports
BFh
Check virus and backup reminders
85h Initialize PC-compatible PnP ISA
devices
C0h
Try to boot with INT 19
86h. Re-initialize onboard I/O ports.
C1h Initialize POST Error Manager (PEM)
87h Configure Motherboard Devices
C2h
Initialize error logging
88h Initialize BIOS Data Area
C3h
Initialize error display function
89h Enable Non-Maskable Interrupts
(NMIs)
C4h
Initialize system error handler
8Ah Initialize Extended BIOS Data Area
C5h PnPnd dual CMOS (optional)
8Bh Test and initialize PS/2 mouse
C6h Initialize notebook docking (optional)
8Ch Initialize floppy controller
C7h Initialize notebook docking late
8Fh Determine number of ATA drives
(optional)
C8h Force check (optional)
90h Initialize hard-disk controllers
C9h Extended checksum (optional)
91h Initialize
local-bus hard-disk
controllers
D2h
Unknown interrupt
92h Jump to UserPatch2
E0h Initialize the chipset
93h Build MPTABLE for multi-processor
boards
E1h Initialize the bridge
95h Install CD ROM for boot
E2h Initialize the CPU
96h Clear huge ES segment register
E3h Initialize system timer
97h Fixup Multi Processor table
E4h Initialize system I/O
98h 1-2. Search for option ROMs.
E5h Check force recovery boot
99h Check for SMART Drive (optional)
E6h Checksum BIOS ROM
9Ah Shadow option ROMs
E7h Go to BIOS
9Ch Set up Power Management
E8h Set Huge Segment
9Dh Initialize security engine (optional)
E9h Initialize Multi Processor
9Eh Enable hardware interrupts
EAh Initialize OEM special code
9Fh Determine number of ATA and SCSI
drives
EBh
Initialize PIC and DMA
A0h Set time of day
ECh Initialize Memory type
A2h Check key lock
EDh
Initialize Memory size
A4h Initialize Typematic rate
EEh Shadow Boot Block
A8h Erase F2 prompt
EFh
System memory test
AAh Scan for F2 key stroke
F0h Initialize interrupt vectors
ACh Enter SETUP
F1h Initialize Run Time Clock
AEh Clear Boot flag
F2h Initialize video
B0h Check for errors
F3h Initialize System Management Mode
B2h POST done - prepare to boot
operating system
F4h Output one beep before boot