HP XA manual PAC Chip 440LX, PL Bus Interface, PCI Bus Interface, System Board Chip-Set

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2 System Board

Chip-Set

Chip-Set

The Intel AGPset is comprised of two chips. The 440LX PAC chip and the

PIIX4chip.

The PAC chip (440LX) is the bridge between four buses: the PL (GTL) bus, the main memory bus, the PCI bus and the AGP (graphic) bus.

The PIIX4 chip is the bridge between three buses: the PCI bus, the SM bus and the ISA bus. In addition, it contains the IDE controller, USB controller and Power Management logic

 

The PAC Chip (440LX)

 

The PAC chip, called the Intel 440LX AGPset, is contained in a Ball Grid

 

Array (BGA) package, giving a smaller footprint and higher reliability.

 

The PAC chip integrates a Host-to-PCI bridge, optimized DRAM controller

 

and data path, and an Accelerated Graphics Port (AGP) interface. The AGP

 

is a high performance, component level interconnect, targeted at 3D

 

graphics applications.

PL Bus Interface

The PAC chip monitors each cycle that is initiated by the processor, and

 

forwards those to the PCI bus that are not targeted at the local memory. It

 

translates PL bus cycles into PCI bus cycles.

 

The chip can support one or two Pentium II processors, at up to 66 MHz FSB

 

clock frequency. Refer to page 35 for a description of the devices on the

 

Processor-Local Bus.

PCI Bus Interface

The PCI bus interface is PCI 2.1 compliant.

 

Sequential PL-to-PCI memory write cycles are translated into PCI zero wait

 

state burst cycles. The maximum PCI burst transfer can be between

 

256 bytes and 4 KB. The chip supports advanced snooping for PCI master

 

bursting, and provides a pre-fetch mechanism dedicated for IDE read.

 

The PCI arbiter supports PCI bus arbitration for up to six masters using a

 

rotating priority mechanism. Its hidden arbitration scheme minimizes

 

arbitration overhead. Additional logic on the PC Workstation extends the

 

number of fully supported masters to seven (440LX master not counted).

 

Refer to page 39 for a description of the devices on the Processor-Local Bus.

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Contents Technical Reference Manual Hardware and Bios Page Preface Bibliography How to use this online guide Page Contents Interface Devices and Mass-Storage Drives HP Bios Power-On Self-Test and Error Messages System Overview Rear view Package for the Desktop ModelsFront view System Overview Package for the Desktop ModelsPackage for the Minitower Models HP Kayak XA PC Workstation Overview Hardware Control Panel Minitower Hardware Control PanelSystem Overview Hardware Control Panel Specifications and Characteristic Data Physical CharacteristicsElectrical Specifications Min Safety StandardEfficiency Max 11.0Max Current at +5 Voltage range 90-140Maximum input current +3.3 V and +5 Current at -5 Current at +5V standbyDesktop Parameter Total Rating Current at +12 Current at -12Environmental Specifications Desktop and Minitower Access HP World Wide Web DocumentationWhere to Find the Information Routines Post GuideSystem board Peripheral DevicesSystem Overview Documentation System Board System Board and Backplane Boards System Board System Board and Backplane BoardsDesktop Backplane PCI Mapping Table Device DesktopBackplane front view PCI Device Slot#Not used Architectural View System Board Architectural ViewPL Bus Interface Chip-SetPAC Chip 440LX PCI Bus InterfaceSystem Clocking AGP Bus InterfaceRead/Write Buffers Main Memory ControllerPIIX4, PCI/ISA Bridge Chip 82371AB Second Level CacheIDE Controller ISA Bus InterfaceSMBus Controller USB ControllerCounter / Timer Serial EepromCache Memory Devices on the Processor-Local Bus Intel Pentium II MicroprocessorSystem Board Devices on the Processor-Local Bus Plastic clips Bracket pillars Heat sink Switch Bus FrequenciesLocal Bus Error Correcting Code Operation Main Memory BusSystem Board Main Memory Bus PCI Device Devices on the PCI BusIntegrated Drive Electronics IDE Name NumberOther PCI Accessory Devices Universal Serial Bus USB ControllerPlug and Play Accelerated Graphics Port AGP Controller System Board Accelerated Graphics Port AGP ControllerDevice PCI Bus # Pentium II Processor 66 MHz System Board Devices on the SM Bus Devices on the SM BusSerial Eeprom Device SM Bus AddressLM75 Chip Main PLLSerial / parallel Devices on the ISA BusSuper I/O Controller NS ControllerAudio Controller SpecificationsFeature Description Host InterfaceFlash Eeprom Closed System Board SwitchesSwitch Switch Function Default OpenBios Update Crisis Recovery Procedure Updating the system Little BenOther ISA Accessory Devices Check the accessory board’s documentation if you are unsureSystem Board Devices on the ISA Bus Interface Devices and Mass-Storage Drives Cirrus 5465 Graphics Controller Chip Page Connectors Video MemoryRefresh rates Available Video ResolutionsResolution 640 60, 75, 85 Hz 800Scsi / LAN Combo Board PCI InterfaceConnector Description Location 10BT/100TX PCI LAN ConnectorUltra wide 16-bit Scsi connector Scsi InterfaceInterface Features PCI Interface External 8-bit Scsi connectorScsi / PCI LAN Combo Board Features Scsi Interface10BT/100TX LAN Controller 10BT/100TX LAN Features Remote Power OnSupporting RPO Installing Two LAN Remote Power On Cards Mass-Storage Drives Hard Disk DrivesFlexible Disk Drives Features Panasonic CD-ROM CD-585-B CD-ROM DrivesBuffer Memory Size Kbytes Status Panel Connector Pin Signal Connectors and SocketsIDE Connector Pin Signal Flexible Disk Drive Data Connector Pin SignalExtStart Connector Bit Scsi Connector Bit Scsi Connector Pin SignalAUX Connector Pin Signal CD Audio Connector Pin SignalPin Signal Package Intrusion J8VGA DB Connector Pins Standard VGA Vesa Pass-Through ConnectorVGA Connector Socket Pin LayoutsPage HP Bios HP/Phoenix Bios Summary Using the HP Setup ProgramHP/Phoenix Bios Summary Advanced Menu Security Default Settings You Can Change Symbios Logic Scsi Configuration UtilityStarting the Scsi Configuration Utility Power Saving and Ergonometry Power-On from Space-BarSoft Power Down Bios Addresses System Memory MapHP I/O Port Map I/O Addresses Used by the System1 Address Ports FunctionDMA controller Interrupt Request Description HP Bios Power-On Self-Test and Error Messages For example, if the error 0101 52 is displayed Order in Which the Tests are PerformedPost Routine Description Code Post Routine Description Post Routine Description Detect and install external parallel ports Detect and install external RS 232 portsConfigure non-MCD IDE controllers Configure Motherboard Configurable DevicesPost done prepare to boot operating system Enter SetupCheck for errors Terminate QuietBootFollowing are for boot block in Flash ROM F1= Continue, F2= Setup, Enter= View System Error Error Message SummaryPower-On Self-Test and Error Messages Error Message Summary Enter= View System ErrorCause / Symptom 0512h HDD # 2 self-test error 0510h HDD # 0 self-test error0511h HDD # 1 self-test error 0513h HDD # 3 self-test errorMessage Beep Codes Beep PatternLights on the Hardware Control Panel Appendix Video Modes Standard VGA ModesExtended Video Modes ColorsType Refresh MHz 94.5 44.978.7 102135 108126 157162 104Refresh Mode Bios Modes SupportedResolution MHz DAC Maximum Refresh Rates600 1024106 Type 1200107 Appendix Video Modes 108