Samsung P560, Service Manual, Page: 162 / 393

4-12
4. Troubleshooting
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POST Code Function Phase Component
0xA0 Setup time tick for current date/time LBT Core
0xA2 Setup Numlock indicator. Display a message if key switch is locked. LBT Core
0xA4 Initialize typematic rate LBT Core
0xDB StrongROM Test LBT Core
0xE2 OEM security key test LBT Core
0xC2 Write PEM errors. LBT Core
0xBA Initialize the SMBIOS header and sub-structures. LBT Core
0xC3 Display PEM errors. LBT Core
0xA8 Overwrite the “Press F2 for Setup” prompt with spaces, erasing it from the screen. LBT Core
0xAA
Scan the key buffer to see if the F2 key was struck after keyboard interrupts
were enabled. If an F2 keystroke is found, set a flag.
LBT Core
0xE1 Start Periodic Timer (TC Subscribe) LBT Core
0xAC Check if “Enter SETUP” is pressed. LBT Core
0x8F
Count the number of ATA drives in the system and update the number in
bdaFdiskcount.
LBT Core
0x91 Configure the local bus IDE timing register based on the drives attached to it. LBT Core
0x9F Check the total number of Fast Disks (ATA and SCSI) and update the bdaFdiskCount. LBT Core
0xD7 Check if FirstWare HPA exists LBT Core
0xAE Clear ConfigFailedBit and InPostBit in CMOS. LBT Core
0xB0 Check for errors and decide if needs to run Setup. LBT Core
0xB2
Change status bits in CMOS and/or the TrustedCore data area to reflect the
fact that POST is complete.
LBT Core
0xB5 Fade out OEM Logo or post string LBT Core
0xC5 End hotkey detection (Server BIOS) LBT Core
0xBE If BCP option is enabled, clear the screen before booting. LBT Core
0xB6
If password on boot is enabled, a call is made to Setup to check password.
If the user does not enter a valid password, Setup does not return.
LBT Core
0xBC Clear parity-error latch LBT Core
0xB7 Initialize ACPI BIOS. LBT Core
0x9B Enable CPU management (Geyserville I) LBT Core
0xBD Display Boot First menu if MultiBoot is installed and hotkey pressed. LBT Core
0xBF Check virus and backup reminders. LBT Core
0x97 Create pointer to MP table in Extended BDA. LBT Core
0x99
Check support status for Self-Monitoring Analysis Reporting Technology
(disk-failure warning).
LBT Core
0xB1 Unload ROM Pilot LBT Core
0xDD Perform remote flash if requested LBT Core
0xC7 If UCR redirection is installed, remove display manager and unhook INT10 LBT Core
0XDF Shutdown the PXE UNDI code LBT Core
0xB3 Store enhanced CMOS values in non-volatile area LBT Core
0xE4 Last Legacy BIOS Task before hand off to UEFI/DXE LBT Core
0xB9 Clear all screen graphics before booting. bootLegacy Core
0xC0 INT19 entry for legacy boot bootLegacy Core
0xEF Invalid AP # SDXE Core
0xEF Non-Yohna and non-Morem class CPU found for SDXE (getTSCFreq) SDXE Core
0xEE AP cannot synch BSP in SDXE (syncWithBSP) SDXE Core
0xEE BSP cannot synch w/ AP in SDXE (syncWithAP) SDXE Core