P55 Motherboard Code Error Messages
This section provides the P55 Motherboard, POST Codes during system boot up. On board LED Codes, LED Post Codes, Error Messages. Diagnostic code display.
03 – Initialize BIOS.
04 – Check Battery Power and CMOS
05 – Initialize interrupt controlling hardware/vector table
06 – Initialize system timer
07 – Fixes CPU POST interface calling pointer
08 – Primary initialization of CPU
C0 – Secondary initialization of CPU
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 initialization exit
0A – Initialize keyboard controller
0B – Detect Mouse
0C – Detect Keyboard
0E – Test input devices
13 – Early POST initialization of chipset registers
20 – Relocate System Management interrupt vector
24 – Uncompress and initialize BIOS module
2A – Initialize devices primary
2C – Initialize devices secondary
2E – Initialize output devices
31 – Allocate memory for ADM module
33 – Initialize silent boot module
37 – Display sign-on message
38 – Initialize USB controller
39 – Initialize DMAC-1 & DMAC-2
3A – Initialize real time clock
3B – Test system memory
3C – Initialization of chipset registers
40 – Detect coprocessor
52 – Update CMOS memory size
60 – Initialize NUM-LOCK
75 – Initialize Int-13
78 – Initialize IPL devices
7C – Generate and write contents of ESCD
84 – Log errors encountered
85 – Display errors, if no display check monitor/video card
87 – Execute BIOS setup if needed or requested
8C – Late POST initialization of chipset registers
8D – Build ACPI tables
8E – Program peripheral parameters
90 – Initialize system management interrupt
A1 – Prepare for system boot
A2 – Initialize IRQ routing table
A4 – Display boot option popup
A7 – Display system configuration screen
A9 – Wait for user input at configuration display
AA – Uninstall POST vector
AB – Prepare BBS for Int 19 boot
AC – End of POST initialization
B1 – Save system context for ACPI
00 – Pass control to OS (can vary) Show CPU Temp (if enabled)
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