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Server Management Intel® Server Board SE7501WV2 TPS
Revision 1.0
Intel reference number C25653-001
68
Diagnostic LED
Decoder
G=Green, R=Red,
A=Amber
Hi Low
Description
26h Off G A Off Read Microcode updates from BIOS ROM.
28h G Off R Off
Initializing the processors. Set up processor registers. Select least featured
processor as the BSP.
2Ah G Off A Off Go to Big Real Mode
2Ch G G R Off Decompress INT13 module
2Eh G G A Off
Keyboard Controller Test: The keyboard controller input buffer is free. Next,
issuing the BAT command to the keyboard controller
30h Off Off R R Keyboard/Mouse port swap, if needed
32h Off Off A R
Write Command Byte 8042: The initialization after the keyboard controller BAT
command test is done. The keyboard command byte will be written next.
34h Off G R R
Keyboard Init: The keyboard controller command byte is written. Next, issuing
the pin 23 and 24 blocking and unblocking commands
36h Off G A R Disable and initialize 8259
38h G Off R R Detect Configuration Mode, such as CMOS clear.
3Ah G Off A R Chipset Initialization before CMOS initialization
3Ch G G R R
Init System Timer: The 8254 timer test is over. Starting the legacy memory
refresh test next.
3Eh G G A R
Check Refresh Toggle: The memory refresh line is toggling. Checking the 15
second on/off time next
40h Off R Off Off Calculate CPU speed
42h Off R G Off Init interrupt Vectors: Interrupt vector initialization is done.
44h Off A Off Off Enable USB controller in chipset
46h Off A G Off Initialize SMM handler. Initialize USB emulation.
48h G R Off Off Validate NVRAM areas. Restore from backup if corrupted.
4Ah G R G Off
Load defaults in CMOS RAM if bad checksum or CMOS clear jumper is
detected.
4Ch G A Off Off Validate date and time in RTC.
4Eh G A G Off Determine number of micro code patches present
50h Off R Off R Load Micro Code To All CPUs
52h Off R G R Scan SMBIOS GPNV areas
54h Off A Off R Early extended memory tests
56h Off A G R Disable DMA
58h G R Off R Disable video controller
5Ah G R G R 8254 Timer Test on Channel 2
5Ch G A Off R
Enable 8042. Enable timer and keyboard IRQs. Set Video Mode: Initialization
before setting the video mode is complete. Configuring the monochrome mode
and color mode settings next.
5Eh G A G R
Init PCI devices and motherboard devices. Pass control to video BIOS. Start
serial console redirection.
60h Off R R Off Initialize memory test parameters
62h Off R A Off
Initialize AMI display manager Module. Initialize support code for headless
system if no video controller is detected.
64h Off A R Off Start USB controllers in chipset
66h Off A A Off Set up video parameters in BIOS data area.