HP proliant ML110 Operation And Maintenance Manual page 89

System Diagnostics
The routine derives the beep code from the test point error as follows:
1. The 8-bit error code is broken down to four 2-bit groups (Discard the most significant
group if it is 00).
2. Each group is made one-based (1 through 4) by adding 1.
3. Short beeps are generated for the number in each group.
Example:
Test point 01Ah = 00 01 10 10 = 1-2-3-3 beeps
The table below lists the checkpoint codes written at the start of each test and the beep codes
issued for terminal errors.
Table 7-2: POST Beep Codes
Code
02h
03h
04h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Eh
0Fh
10h
11h
12h
13h
14h
16h
17h
18h
1Ah
1Ch
7-4
Beep POST routine description
Verify Real Mode
Disable Non-Maskable Interrupt (NMI)
Get CPU type
Initialize system hardware
Disable shadow and execute code from the ROM
Initialize chipset with initial POST values
Set in POST flag
Initialize CPU registers
Enable CPU cache
Initialize caches to initial POST values
Initialize I/O component
Initialize the local bus IDE
Initialize power management
Load alternate registers with initial POST values
Restore CPU control word during warm boot
Initialize PCI bus mastering devices
Initialize keyboard controller
1-2-2-3 BIOS ROM checksum
Initialize cache before memory auto size
8254 timer initialization
8237 DMA controller initialization
Reset Programmable Interrupt Controller
HP ProLiant ML110 Server Operations and Maintenance Guide
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