Acer X5950, X3950 manual Post Code Checkpoints

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POST Code Checkpoints

The POST code checkpoints are the largest set of checkpoints during the BIOS preboot process. The following table describes the type of checkpoints that may occur during the POST portion of the BIOS.

NOTE: Please note that checkpoints may differ between different platforms based on system configuration. Checkpoints may change due to vendor requirements, system chipset or option ROMs from add-in PCI

devices.

Checkpoint

Description

 

 

03

Disable NMI, Parity, video for EGA, and DMA controllers. Initialize BIOS, POST,

 

Runtime data area. Also initialize BIOS modules on POST entry and GPNV area.

 

Initialized CMOS as mentioned in the Kernel Variable "wCMOSFlags."

 

 

04

Check CMOS diagnostic byte to determine if battery power is OK and CMOS

 

checksum is OK. Verify CMOS checksum manually by reading storage area.

 

If the CMOS checksum is bad, update CMOS with power-on default values and

 

clear passwords. Initialize status register A.

 

Initializes data variables that are based on CMOS setup questions.

 

Initializes both the 8259 compatible PICs in the system

 

 

05

Initializes the interrupt controlling hardware (generally PIC) and interrupt vector

 

table.

 

 

06

Do R/W test to CH-2 count reg. Initialize CH-0 as system timer.Install the

 

POSTINT1Ch handler. Enable IRQ-0 in PIC for system timer interrupt. Traps

 

INT1Ch vector to "POSTINT1ChHandlerBlock."

 

 

07

Fixes CPU POST interface calling pointer.

 

 

08

Initializes the CPU. The BAT test is being done on KBC. Program the keyboard

 

controller command byte is being done after Auto detection of KB/MS using AMI

 

KB-5.

 

 

C0

Early CPU Init Start -- Disable Cache – Init Local APIC

 

 

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 Init Exit

 

 

0A

Initializes the 8042 compatible Key Board Controller.

 

 

0B

Detects the presence of PS/2 mouse.

 

 

0C

Detects the presence of Keyboard in KBC port.

 

 

0E

Testing and initialization of different Input Devices. Also, update the Kernel

 

Variables.

 

Traps the INT09h vector, so that the POST INT09h handler gets control for IRQ1.

 

Uncompress all available language, BIOS logo, and Silent logo modules.

 

 

13

Early POST initialization of chipset registers.

 

 

24

Uncompress and initialize any platform specific BIOS modules. GPNV is initialized

 

at this checkpoint.

 

 

30

Initialize System Management Interrupt.

 

 

2A

Initializes different devices through DIM.

 

See DIM Code Checkpoints section for more information.

 

 

2C

Initializes different devices. Detects and initializes the video adapter installed in the

 

system that have optional ROMs.

 

 

2E

Initializes all the output devices.

 

 

Chapter 4

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Contents Acer Aspire X3950/X5950 Service Guide Revision History Copyright Disclaimer Conventions Service Guide Coverage Table of Contents System Block Diagram and Board Layout Chapter FeaturesDimension and weight Power supplyPorts Operating system and softwareFront Panel System ComponentsX3950 Icon ComponentX5950 Rear Panel Internal Components LED indicator Color LED status Description System LED IndicatorsChapter System Utilities Cmos Setup UtilityNavigating Through the Setup Utility Entering Cmos setupSetup Utility Menus Parameter Description Product InformationParameter Description Option Standard Cmos FeaturesLAN Advanced Bios FeaturesEist Advanced Chipset FeaturesAhci Integrated PeripheralsPower Management Setup Vbat PC Health StatusFrequency/Voltage Control Setting a system password Bios Security FeaturesRemoving a system password Load Default Settings Save & Exit Setup Exit Without Saving Disassembly Requirements System DisassemblyPre-disassembly Procedure X3950 model Main Unit DisassemblyX5950 model Removing the Side Panel Removing the Front Bezel Page Removing the Heatsink Fan Assembly Page Removing the Processor Page Removing the Optical Drive Remove the two screws C that secure the optical drive Slide the optical drive out of the bracket Removing the Hard Disk Drive Removing the Power Supply Lift the power supply module off the unit X3950 Removing the Memory Modules To remove a network card Removing an Expansion CardTo remove a VGA card To remove a TV tuner card Removing the Front I/O and Card Reader Boards Pull the board out of the bracket Chapter Pull the I/O board out of the bracket Removing the Mainboard Lift the board off the housing Removing the Top Bezel Chapter Hardware Diagnostic Procedure System TroubleshootingPower System Check System Check ProceduresSystem External Inspection System Internal InspectionBootblock Initialization Code Checkpoints Viewing Bios checkpointsCheckpoints Checkpoint DescriptionBootblock Recovery Code Checkpoints Post Code Checkpoints Module Acpi Runtime Checkpoints DIM Code CheckpointsBoot Error MessagesMemory Message Displayed DescriptionStorage Device Virus Related Eprom System ConfigurationMiscellaneous CmosSmbios eModule Error Messages USB eModule Error MessagesCPU eModule Error Messages MPS Table Multi-processor eModule Error MessagesBeep Codes Beep Symptom Cause and DescriptionIndex of Symptom-to-FRU Error Message Diskette Drive-Related Symptoms Symptom / Error Action/FRU CD/DVD-ROM Drive-Related Symptoms Symptom / Error Action/FRU Hard Disk Drive-Related Symptoms Symptom / Error Action/FRUModem-Related Symptoms Symptom / Error Action/FRU Real-Time Clock-Related Symptoms Symptom / Error Action/FRUAudio-Related Symptoms Symptom / Error Action/FRU Some or all keys on keyboard do not work  Keyboard Bios Recovery Select Save & Exit Setup, then press Enter Undetermined Problems System Block Diagram System Block Diagram and Board LayoutCode Description Mainboard LayoutPWR1 Chapter FRU Field Replaceable Unit List X3950 model Exploded DiagramX5950 model System model PV.SE602.004 AX3950 AAP AJC PV.SE602.004 X3950 FRU ListCPU/PROCESSOR System model PT.SE602.003 AX3950 AAP ACS PT.SE602.003 Speaker Speaker Chiamaw 9M-20A200-000 Acer Logo LF System model PT.SE602.004 AX3950 AAP ACS PT.SE602.004 Front Bezel W/LED Switch Cable for TBD CPU/PROCESSOR System model PT.SE602.005 AX3950 AAP ACS PT.SE602.005 KH.01K01.007 System model 91.3CY01.002G Aagassi PVT/MVB SKU AX5950 X5950 FRU ListFront Bezel for Speaker Speaker USB Neosonica NEW Silver Color AC-MT-113 Appendix a SpecificationSystem Bios VGA Interface Keyboard and Input Devices BD Combo Module SpecificationBdmv Aacs Pcav Super Multi SpecificationDVD-R 2x / 4x CLV, 2.4x~6x Appendix a 100