Chapter 4: Useful help | 41
EIH81-IHP User’s Manual
4.2
AMI BIOS Beep Code
Boot Block Beep Codes
Number of Beeps
Description
Continuing
Memory sizing error or Memory module not found
POST BIOS Beep Codes
Number of Beeps
Description
1
Success booting.
8
Display memory error (system video adapter)
4.3
AMI BIOS post code
Checkpoint Description
03
Disable NMI, Parity, video for EGA, and DMA controllers. Initialize BIOS, POST, Runtime data area. Also
initialize BIOS modules on POST entry and GPNV area. Initialized CMOS as mentioned in the Kernel Variable
“wCMOSFlags.”
04
Check CMOS diagnostic byte to determine if battery power is OK and CMOS checksum is OK. Verify CMOS
checksum manually by reading storage area. If the CMOS checksum is bad, update CMOS with power-on
default values and clear passwords. Initialize status register A.
Initializes data variables that are based on CMOS setup questions.
Initializes both the 8259 compatible PICs in the system
05
Initializes the interrupt controlling hardware (generally PIC) and interrupt vector table.
06
Do R/W test to CH-2 count reg. Initialize CH-0 as system timer. Install the POSTINT1Ch handler. Enable IRQ-0
in PIC for system timer interrupt.
Traps INT1Ch vector to “POSTINT1ChHandlerBlock.”
07
Fixes CPU POST interface calling pointer.
08
Initializes the CPU. The BAT test is being done on KBC. Program the keyboard controller command byte is
being done after Auto detection of KB/MS using AMI KB-5.
C0
Early CPU Init Start -- Disable Cache – Init Local APIC.
C1
Set up boot strap processor Information.
C2
Set up boot strap processor for POST.
C5
Enumerate and set up application processors.
C6
Re-enable cache for boot strap processor.
C7
Early CPU Init Exit.
0A
Initializes the 8042 compatible Key Board Controller.
0B
Detects the presence of PS/2 mouse.
0C
Detects the presence of Keyboard in KBC port.
0E
Testing and initialization of different Input Devices. Also, update the Kernel Variables.
Traps the INT09h vector, so that the POST INT09h handler gets control for IRQ1. Uncompress all available
language, BIOS logo, and Silent logo modules.
13
Early POST initialization of chipset registers.
20
Relocate System Management Interrupt vector for all CPU in the system.
24
Uncompress and initialize any platform specific BIOS modules. GPNV is initialized at this checkpoint.
2A
Initializes different devices through DIM.
See DIM Code Checkpoints section of document for more information.
2C
Initializes different devices. Detects and initializes the video adapter installed in the system that have optional
ROMs.
2E
Initializes all the output devices.
31
Allocate memory for ADM module and uncompress it. Give control to ADM module for initialization. Initialize
language and font modules for ADM. Activate ADM module.
33
Initializes the silent boot module. Set the window for displaying text information.
37
Displaying sign-on message, CPU information, setup key message, and any OEM specific information.
38
Initializes different devices through DIM. See DIM Code Checkpoints section of document for more information.
USB controllers are initialized at this point.
39
Initializes DMAC-1 & DMAC-2.
3A
Initialize RTC date/time.
3B
Test for total memory installed in the system. Also, Check for DEL or ESC keys to limit memory test. Display
total memory in the system.
3C
Mid POST initialization of chipset registers.
