Error Reporting and Handling
Intel® Server Board SE7520AF2 TPS
202
Revision
1.2
Intel order number C77866-003
Diagnostic LED
Decoder
G=Green, R=Red,
A=Amber
Check
point
Hi
Low
Description
8C
A
G
Off
Off
Late POST initialization of chipset registers.
8D
A
G
Off
G
Build ACPI tables (if ACPI is supported)
8E
A
G
G
Off
Program the peripheral parameters. Enable/Disable NMI as selected
90
R
Off
Off
R
Late POST initialization of system management interrupt.
A0
R
Off
R
Off
Check boot password if installed.
A1
R
Off
R
G
Clean-up work needed before booting to operating system.
A2
R
Off
A
Off
Takes care of runtime image preparation for different BIOS modules. Fill the
free area in F000h segment with 0FFh. Initializes the Microsoft* IRQ Routing
Table. Prepares the runtime language module. Disables the system
configuration display if needed.
A4
R
G
R
Off
Initialize runtime language module.
A7
R
G
A
G
Displays the system configuration screen if enabled. Initialize the CPU’s before
boot, which includes the programming of the MTRR’s.
A8
A
Off
R
Off
Prepare CPU for operating system boot including final MTRR values.
A9
A
Off
R
G
Wait for user input at config display if needed.
AA
A
Off
A
Off
Uninstall POST INT1Ch vector and INT09h vector. De-initializes the ADM
module.
AB
A
Off
A
G
Prepare BBS for Int 19 boot.
AC
A
G
R
Off
End of POST initialization of chipset registers.
B1
R
Off
R
A
Save system context for ACPI.
00
Off
Off
Off
Off
Passes control to OS Loader (typically INT19h).
61-70
- - - -
OEM POST Error. This range is reserved for chipset vendors and system
manufacturers. The error associated with this value may be different from one
platform to the next.
7.3.1.4
Bootblock Initialization Code Checkpoints
The Bootblock initialization code sets up the chipset, memory and other components before
system memory is available. The following table describes the type of checkpoints that may
occur during the bootblock initialization.
Table 91. Bootblock Initialization Code Checkpoints
Diagnostic LED
Decoder
G=Green, R=Red,
A=Amber
Check
point
Hi
Low
Description
Before
D1h
R R Off
A
Early chipset initialization is done. Early super I/O initialization is done including
RTC and keyboard controller. NMI is disabled.
D1
R R Off
A
Perform keyboard controller BAT test. Check if waking up from power
management suspend state. Save power-on CPUID value in scratch CMOS.
D0
R R Off
R
Go to flat mode with 4GB limit and GA20 enabled. Verify the bootblock
checksum.