Technical Product Specification
Intel® Server System SR1690WB TPS Appendix B: POST Code LED Decoder
Revision 1.7 55
Intel order number: E72797-009
Checkpoint
Diagnostic LED Decoder
Description
1 = On, 0=Off
Upper Nibble
Lower Nibble
MSB
LSB
8h
4h
2h
1h
8h
4h
2h
1h
LED
#7
#6
#5
#4
#3
#2
#1
#0
0x94h
1
0 0
1
0
1
0 0
Clearing keyboard input buffer
0x96h
1
0 0
1
0
1 1
0
Reserved for keyboard
Mouse (only USB)
0x98h
1
0 0
1
0 0
1
0
Resetting the mouse
0x99h
1
0 0
1
0 0
1 1
Detecting the mouse
0x9Ah
1
0 0
1
0
1 1
0
Detecting the presence of mouse
0x9Bh
1
0 0
1
0
1 1 1
Enabling the mouse
0x9Ch
1
0 0
1
0 0
1
0
Reserved for mouse
Serial Port
0xA8h
1
0
1
0
1
0 0 0
Resetting the serial port
0xA9h
1
0
1
0
1
0 0
1
Disabling the serial port
0xAAh
1
0
1
0 1
0
1
0
Detecting the presence of the serial port
0xABh
1
0
1
0
1
0
1 1
Clearing serial port buffer
0xACh
1
0
1
0
1 1
0 0
Enabling serial port
0xADh
1
0
1
0
1 1
0
1
Reserved for serial port
Fixed Media
0xB0h
1
0
1 1
0 0 0 0
Resetting fixed media device
0xB1h
1
0
1 1
0 0 0
1
Disabling fixed media device
0xB2h
1
0
1 1
0 0
1
0
Detecting presence of a fixed media device (SATA hard drive
detection, and so forth)
0xB3h
1
0
1 1
0 0
1 1
Enabling/configuring a fixed media device
0xB4h
1
0
1 1
0
1
0 0
Reserved for fixed media
Removable Media
0xB8h
1
0
1 1 1
0 0 0
Resetting removable media device
0xB9h
1
0
1 1 1
0 0
1
Disabling removable media device
0xBAh
1
0
1 1 1
0
1
0
Detecting presence of a removable media device (SATA CDROM
detection, and so forth)
0xBCh
1
0
1 1 1 1
0 0
Enabling/configuring a removable media device
0xBDh
1
0
1 1 1 1
0
1
Reserved for removable media device
Boot Device Selection (BDS)
0xD0
1 1
0
1
0 0 0 0
Entered the Boot Device Selection phase (BDS)
0xD1
1 1
0
1
0 0 0
1
Return to last good boot device
0xD2
1 1
0
1
0 0
1
0
Setup boot device selection policy
0xD3
1 1
0
1
0 0
1 1
Connect boot device controller
0xD4
1 1
0
1
0
1
0 0
Attempt flash update boot mode
0xD5
1 1
0
1
0
1
0
1
Transfer control to EFI boot
0xD6
1 1
0
1
0
1 1
0
Trying to boot device selection
0xDF
1 1
0
1 1 1 1 1
Reserved for boot device selection
Pre-EFI Initialization (PEI) Core
0xE0h
1 1 1
0 0 0 0 0
Entered Pre-EFI Initialization phase (PEI)
0xE1h
1 1 1
0 0 0 0
1
Started dispatching early initialization modules (PEIM)
0xE2h
1 1 1
0 0 0
1
0
Initial memory found, configured, and installed correctly
0xE3h
1 1 1
0 0 0
1 1
Transfer control to the DXE Core
PEI Modules
0xF0h
1 1 1 1
0 0 0 0
Install PEIM for Platform Status Codes
0xF1h
1 1 1 1
0 0
0
1
Detecting Platform Type
0xF2h
1 1 1 1
0 0
1
0
Early Platform Initialization
0xF3h
1 1 1 1
0 0
1 1
PEI Modules initialized
Driver eXecution Environment (DXE) Core
0xE4h
1 1 1
0 0
1
0 0
Entered EFI driver execution phase (DXE)
0xE5h
1 1 1
0 0
1
0
1
Started dispatching drivers
0xE6h
1 1 1
0 0
1 1
0
Started connecting drivers