Table 91. Bootblock Initialization Code Checkpoints - Intel SE7520AF2 Technical Product Specification

Error Reporting and Handling
Diagnostic LED
Decoder
Check
G=Green, R=Red,
point
A=Amber
Hi
8C A G Off
8D A G Off
8E A G G
90 R Off Off
A0 R Off R
A1 R Off R
A2 R Off A
A4 R G R
A7 R G A
A8 A Off R
A9 A Off R
AA A Off A
AB A Off A
AC A G R
B1 R Off R
00 Off Off Off
61-70 - - -
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.
Diagnostic LED
Decoder
Check
G=Green, R=Red,
point
A=Amber
Hi
Before
R R Off
D1h
D1
R R Off
D0
R R Off
202
Low
Off Late POST initialization of chipset registers.
G Build ACPI tables (if ACPI is supported)
Off Program the peripheral parameters. Enable/Disable NMI as selected
R Late POST initialization of system management interrupt.
Off Check boot password if installed.
G Clean-up work needed before booting to operating system.
Takes care of runtime image preparation for different BIOS modules. Fill the
free area in F000h segment with 0FFh. Initializes the Microsoft* IRQ Routing
Off
Table. Prepares the runtime language module. Disables the system
configuration display if needed.
Off Initialize runtime language module.
Displays the system configuration screen if enabled. Initialize the CPU's before
G
boot, which includes the programming of the MTRR's.
Off Prepare CPU for operating system boot including final MTRR values.
G Wait for user input at config display if needed.
Uninstall POST INT1Ch vector and INT09h vector. De-initializes the ADM
Off
module.
G Prepare BBS for Int 19 boot.
Off End of POST initialization of chipset registers.
A Save system context for ACPI.
Off Passes control to OS Loader (typically INT19h).
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.

Table 91. Bootblock Initialization Code Checkpoints

Low
Early chipset initialization is done. Early super I/O initialization is done including
A
RTC and keyboard controller. NMI is disabled.
Perform keyboard controller BAT test. Check if waking up from power
A
management suspend state. Save power-on CPUID value in scratch CMOS.
Go to flat mode with 4GB limit and GA20 enabled. Verify the bootblock
R
checksum.
Intel order number C77866-003
Intel® Server Board SE7520AF2 TPS
Description
Description
Revision 1.2