SUPER MICRO Computer AS1020S-8 user manual Appendix B Bios Post Checkpoint Codes

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Appendix B: BIOS POST Checkpoint Codes

Appendix B

BIOS POST Checkpoint Codes

When AMIBIOS performs the Power On Self Test, it writes checkpoint codes to I/O port 0080h. If the computer cannot complete the boot process, diagnostic equipment can be attached to the computer to read I/O port 0080h.

B-1 Uncompressed Initialization Codes

The uncompressed initialization checkpoint codes are listed in order of execution:

Checkpoint

D0h

D1h

D3h

D4h

D5h

Code Description

The NMI is disabled. Power on delay is starting. Next, the initialization code check- sum will be veriﬁ ed.

Initializing the DMA controller, performing the keyboard controller BAT test, starting memory refresh and entering 4 GB ﬂ at mode next.

Starting memory sizing next.

Returning to real mode. Executing any OEM patches and setting the Stack next.

Passing control to the uncompressed code in shadow RAM at E000:0000h. The initialization code is copied to segment 0 and control will be transferred to segment 0.

B-1

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Contents AS1020S-8 Manual Revision Release Date December 28 About This Manual PrefaceManual Organization Bios System SafetyAdvanced Serverboard Setup Advanced Chassis SetupPreface Table of Contents HDD LED NIC1 LED NIC2 LED Advanced Serverboard SetupJsled Advanced Chassis SetupAppendices BiosPage Overview Chapter IntroductionServerboard Features Server Chassis Features Cooling System Serverworks HT-2000/1000 Chipset System Block Diagram Page Preparing for Setup Chapter Server InstallationUnpacking the System Rack Precautions Choosing a Setup LocationServer Precautions Rack Mounting Considerations Installing the Rack Rails Installing the System into a RackIdentifying the Sections of the Rails Identifying the Sections of the Rails Installing the Chassis RailsInstalling the Server into a Rack Installing the Server into the RackInstalling the Server into a Telco Rack Installing the Server into a Telco RackChecking the Serverboard Setup Check the Scsi disk drives Checking the Drive Bay SetupAccessing the drive bays CD-ROM and ﬂoppy disk drivesCheck the airﬂow Supplying power to the systemControl Panel Buttons Chapter System InterfaceControl Panel LEDs Scsi Drive Carrier LEDs Page Electrical Safety Precautions Chapter System SafetyGeneral Safety Precautions ESD Precautions Installing the Onboard Battery Operating PrecautionsUnpacking Chapter Advanced Serverboard SetupPrecautions Handling the ServerboardInstalling the Processor install to the CPU#1 socket ﬁrst Processor and Heatsink InstallationMounting the Serverboard into a Chassis Page Installing Heatsinks Installing the HeatsinksConnecting Data Cables Connecting CablesConnecting Power Cables I/O Ports Connecting the Control PanelSupport Installing MemoryOptimizing memory performance Side and Top Views of DDR InstallationAdding PCI Cards PCI card installationPCI slots H8DSR-8 Serverboard Layout Not drawn to scale Serverboard DetailsOnboard LEDs Description Jumpers Description Default SettingConnectors Description H8DSR-8 Quick ReferenceSecondary Power Connection Connector DeﬁnitionsPrimary ATX Power Connector Processor Power ConnectorOverheat/Fan Fail LED Power LEDUSB0/1 Universal Serial Bus Ports Power Fail LEDReset Button Power ButtonATX PS/2 Keyboard and PS/2 Mouse Ports USB2/3 HeadersSerial Ports Fan HeadersIpmb Header Power LED/SpeakerSMB Power I2C JLAN1/2 Ethernet PortsChassis Intrusion Overheat LEDWake-On-Ring Wake-On-LANExplanation Jumpers Jumper SettingsCmos Clear PCI-X Slot Frequency Select Onboard Speaker Enable/ DisableWatch Dog Power Force On Scsi Controller Enable/ DisableScsi Termination Enable/ Disable VGA Enable/DisableJLAN1/JLAN2 LEDs Onboard IndicatorsI2C to PCI Enable/Disable +3.3V Power LEDPost Code LEDs Scsi Activity LEDsFloppy, IDE and Scsi Drive Connections Floppy ConnectorIDE Connector Diffsens Termpwr Scsi ConnectorsPage Static-Sensitive Devices Chapter Advanced Chassis SetupTools Required Chassis Front and Rear Views Control PanelReplacing System Fans Installing a new fanSystem Fans System Fan FailureAccessing the Drive Bays Drive Bay Installation/RemovalMounting a Scsi drive in a drive carrier Scsi Drive InstallationInstalling/removing hot-swap Scsi drives CD-ROM and Floppy Drive Installation Removing the power supply Power SupplyPower Supply Failure Removing/Replacing the Power SupplyRemoving/Replacing the Power Supply Page Chapter Starting the Setup UtilityIntroduction Main Menu Advanced Settings MenuCPU Conﬁguration Sub-Menu IDE Conﬁguration Hard Disk Write Protect DMA ModeA.R.T Bit Data TransferFloppy Conﬁguration PCI/PnP MenuSuper IO Conﬁguration North Bridge Conﬁguration Chipset MenuECC Conﬁguration Dram ECC Enable MCT Timing ModeUser Conﬁguration Mode Enable Clock to All DIMMsDram BG Scrub Power Down ControlECC Chip Kill Dram Scrub RedirectAcpi Conﬁguration Advanced Acpi Conﬁguration ATA ConﬁgurationEvent Log Conﬁguration Hyper Transport Conﬁguration PCI Express Conﬁguration AMD PowerNow ConﬁgurationRemote Access Conﬁguration MPS ConﬁgurationFan Speed Control Modes CPU Overheat TemperatureSystem Health Monitor System Fan MonitorBoot Settings Conﬁguration Boot MenuCD/DVD Drives Boot Device PriorityHard Disk Drives Removable DrivesExit Menu Security MenuLoad Fail-Safe Defaults Load Optimal DefaultsPage Amibios Error Beep Codes Appendix a Bios Error Beep CodesBeep Code Error Message Description Page Uncompressed Initialization Codes Appendix B Bios Post Checkpoint CodesBootblock Recovery Codes Uncompressed Initialization Codes Checkpoint Appendix B Bios Post Checkpoint Codes Checkpoint A9h Aah Abh B0h B1h 00h Page Appendix C System Speciﬁcations Chassis WeightPower Supply ServerboardRegulatory Compliance