System Diagnostics
Table 7-2: POST Beep Codes
continued
Code
Beep
POST routine description
8Bh
Test and initialize PS/2 mouse
8Ch
Initialize floppy controller
8Fh
Determine number of ATA drives (optional)
90h
Initialize hard disk controllers
91h
Initialize local bus hard disk controllers
92h
Jump to UserPatch2
93h
Build MP table for multi-processor boards
95h
Install CD-ROM for boot
96h
Clear huge ES segment register
97h
Fix up Multi-Processor table
98h
1-2
Search for option ROMs. One long, two short beeps on
checksum failure.
99h
Check for SMART drive (optional)
9Ah Shadow
option
ROMs
9Ch
Set up power management
9Dh
Initialize security engine (optional)
9Eh Enable
hardware
interrupts
9Fh
Determine number of ATA and SCSI drives
A0h
Set time of day
A2h Check
key
lock
A4h Initialize
typematic
rate
A8h Erase
F2
prompt
Aah
Scan for F2 key stroke
Ach
Enter Setup
Aeh Clear
boot
flag
B0h Check
for
errors
B1h
Inform ROM Pilot about the end of POST
B2h
POST done - prepare to boot operating system
B4h
1
One short beep before boot
B5h Terminate
QuietBoot
(optional)
B6h Check
password
(optional)
B7h Initialize
ACPI
BIOS
B9h Prepare
boot
continued
HP ProLiant ML110 Server Operations and Maintenance Guide
7-7