Compaq D310 manual Post Tests, PCI Interrupt Request Lines

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BIOS Overview

PCI Interrupt Request Lines

PCI devices generate interrupt requests using up to eight PCI interrupt request lines. PCI interrupts can be shared; several devices can use the same interrupt. However, optimal system performance is reached when minimizing the sharing of interrupts.

							Devices
	Chipset
	PCI INT
	PCI INT						Internal	USB	USB	USB
	lines							USB	USB	USB
	lines	AGP	PCI1	PCI2	PCI3	AC97		controller	controller	controller	SMBus
		AGP	PCI1	PCI2	PCI3	AC97	LAN	controller	controller	controller	SMBus
							LAN	1	2	3
								1	2	3

	PIRQA	INTA			INTB

	PIRQB	INTB			INTC

	PIRQC				INTD

	PIRQD				INTA

	PIRQE		INTD	INTC

	PIRQF		INTA	INTD

	PIRQG		INTB	INTA

	PIRQH		INTC	INTB

POST Tests

The POST is executed each time the system is powered on, or a reset is performed. The POST process verifies the basic functionality of the system components and initializes certain system parameters.

The POST starts by displaying a graphic screen of the Hewlett-Packard logo when the PC is started.

Devices, such as memory and newly installed hard disks, are configured automatically. The user is not requested to confirm the change. Newly removed hard disks are detected, and the user is prompted to confirm the new configuration by pressing F4.

NOTE The POST does not detect when a hard disk drive has been otherwise changed.

During the POST, the BIOS and other ROM data is copied into high-speed shadow RAM. The shadow RAM is addressed at the same physical location as the original ROM in a manner which is completely transparent to applications. It therefore appears to behave as very fast ROM. This technique provides faster access to the system BIOS firmware.

The following table lists the POST checkpoint codes written at the start of each test:

	Checkpoint	POST Routine Description
	Code	POST Routine Description
	Code

	D0	NMI is Disabled. CPU ID saved. Init code Checksum verification starting.

	D1	To do DMA init, Keyboard controller BAT test, start memory refresh and going to 4GB flat mode.

	D3	To start Memory sizing.

	D4	To comeback to real mode. Execute OEM patch. Set stack.

	D5	E000 ROM enabled. Init code is copied to segment 0 and control to be transferred to segment 0.

Evo D310 Micro Desktop 47

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Contents Technical reference manual Page Discover and use your product Installing, Configuring and UpgradingTroubleshooting Information RoadmapInformation on the hp support web site System recovery cd-romsYour computer’s online information Type of Information Location Finding InformationIntel Chipsets developer.intel.com BibliographyTable of Contents Serviceability System Overview Description System FeaturesSystem Overview Front Panel Package FeaturesRear Connectors AGP Graphic card available as an option Inside the PCRear View Acoustic Noise Emission SpecificationsPhysical Characteristics Environmental SpecificationsPower Consumption System Features System Board Layout System FeaturesSystem Board Components Chipset Main FeaturesIntel 845G System Block Diagram Intel Celeron Socket ProcessorIntel Pentium 4 Socket Dimm slots Main MemoryPCI Slot Numbers Accessory Board SlotsFunction System Board Switches20GB 40GB 80GB Hard Disk DrivesFloppy Disk Drives Ultra-ATA/100 Hard Disk DrivesWriting CD-R 10 = 1,500 KB/s Max Features of the CD-RW DriveOptical Drives CD-RW TechnologyFeatures of the DVD-ROM Drive Digital Versatile Disk DVD Technology Region Audio features of DVD-VideoDVD Region Codes Features of the CD-ROM Drive Memory Usage with Dynamic Video Memory Technology Key FeaturesGraphics Intel 845G Chipset Integrated Graphics65K colors 1920x1440 16.7M colors 1920x1200 Supported ResolutionsResolutions Refresh Rates ATI Radeon65K colors 2048x1536 16.7M colors Hdvi to VGA adapterAnalog Devices AD1981A AudioLAN Controller Description Status Flashing Off LAN ConnectorUSB 2.0 Connectors Serviceability Evo D310 Micro Desktop ServiceabilityHow to rotate Drive bay upwards How to remove the DVD CD-RW, or CD-ROM driveBios Overview Bios Overview Bios SummaryEntering the Configuration and Diagnostics menu Security Menu Using the PC Setup ProgramMain Menu Advanced MenuExit Menu Boot MenuPower Menu Wake Up Event Power Management and Wake Up EventsHP I/O Port Map I/O Addresses Used by the System Bios AddressesSystem Memory Map DMA Channel Controllers Bios Overview Address Ports FunctionInterrupt Request Description Bios Overview DMA controllerInterrupt Controllers Windows 2000 and Windows XPPCI Interrupt Request Lines Post TestsStart searching AMIBOOT.ROM file in root directory Main Bios runtime code is to be decompressedTo enable floppy and timer IRQ, enable internal cache Floppy read errorVideo display checking over. Display mode to be set next To do any setup before Int vector initAny initialization before setting video mode to be done Going for monochrome mode and color mode settingFloppy setup complete. Hard disk setup to be done next Password checked. About to do programming before setupSetup options programming after Cmos setup about to start Going for hard disk controller resetGoing to copy any code to specific area System configuration is displayedTo build MP table if needed To uncompress DMI data and execute DMI Post initMeaning HP e-DiagTools Preboot Diagnostics Beep CodesDrivers and Software DiagTools Drivers SoftwareOperating System SoftwareBios Updates Evo D310 Micro Desktop Page Created in France Date 06/2002