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System Overview

The IntelliStation Z Pro is a versatile product designed to provide state-of-the-art computing power with room for future growth.

Hardware Features

The major features of IntelliStation Z Pro computers are:

. Intel Pentium XeoN microprocessor with MMX technology

. Support for up to 2048 MB (2 GB) of system memory (SDRAM)

. One of the following graphics adapters is preinstalled:

. Integrated Crystal 4235 audio subsystem (supports SoundBlaster and Microsoft Windows Sound System applications)

. Integrated Intel EtherExpress Pro/100B Ethernet subsystem with Wake on LAN

. System Management

. Input/Output Features

. Expansion

System Overview

– Support for additional internal and external SCSI devices

Several model variations are available for IntelliStation Z Pro computers. The following list describes some of the ways in which the models vary:

System Software

System software refers to the following:


IntelliStation Z Pro computers have an IBM BIOS. Support is provided for the following features:

Plug and Play

IntelliStation Z Pro computers conform to the following:


IntelliStation Z Pro computers use IBM power-on self-test (POST) software with initialization code added for the various chips on the system board.

POST software locates any hardware problems or configuration changes. If an error occurs while POST is running, an error code in the form of a text message displays on the screen. For a description of POST error codes, see "POST Error Codes" on page 55. For further information on POST, refer to the IntelliStation Z Pro User Guide.

Configuration/Setup Utility Program

The Configuration/Setup Utility program provides menus for viewing and changing selections for devices and I/O ports, current date and time, start options, system security, advanced setup, ISA legacy resources, and advanced power management. The Configuration/Setup Utility program also provides system summary and product data screens which contain information specific to the computer model being used.

Advanced Power Management

Advanced Power Management (APM) is a feature that reduces power consumption when components of the computer (or the entire computer system) are not in use. When enabled, APM initiates reduced-power modes for the microprocessor, monitor, hard disk drive, or entire system after a specified period of inactivity is reached.1 APM is implemented in IntelliStation Z Pro computers according to the APM BIOS Interface Specification (Version 1.2). For more information on APM, refer to Understanding Your IntelliStation Z Pro and the IntelliStation Z Pro User Guide.

Advanced Configuration and Power Interface (ACPI)

IntelliStation Z Pro computers support Advanced Configuration and Power Interface (ACPI). ACPI, when enabled, allows the operating system to control the power management features of your computer. Not all operating systems support ACPI. Refer to your operating system documentation to determine if ACPI is supported.

Flash Update Utility Program

A stand-alone utility program is available to support user-initiated flash code updates. This utility program updates the BIOS code in flash memory. IntelliStation Z Pro computers also support BIOS updating over the LAN (Flash-over-LAN). The Flash-over-LAN function requires the use of the integrated system board Ethernet.

The flash update utility program is available at http://www.pc.ibm.com/us/intellistation  on the World Wide Web. (Select Support at this Web site.) The flash update utility program is also available through the PC Company Bulletin Board Service in files that can be downloaded onto a diskette. Instructions for using the flash update utility program will be available in a README file included in the downloaded files. Refer to the IntelliStation Z Pro User Guide for further information.

Diagnostic Programs

An IBM Enhanced Diagnostics CD comes with IntelliStation Z Pro (Type 6865) computers. The CD provides programs that you can run to diagnose hardware and some software problems. Several utility programs that provide helpful information about your computer are also included. The user interface for running these diagnostics and utilities is provided by WaterGate Software's PC Doctor. These diagnostics help to isolate your computer hardware from software that was preinstalled (or that you have installed) on your hard disk. The programs run independent of the operating system, and must be run either from the CD or from a diskette that can be created from the CD or downloaded from the World Wide Web. These diagnostics are generally used when other methods are not accessible or have not been successful in isolating a problem suspected to be hardware related. If necessary, you can also download the latest image of the diagnostics from the World Wide Web. For instructions on downloading the image and creating a bootable Enhanced Diagnostics diskette, as well as  ther information on the diagnostic programs that come with IntelliStation Z Pro (Type 6865) computers, refer to the IntelliStation Z Pro User Guide.

Device Drivers

IntelliStation Z Pro computers come with device drivers to support built-in features and several operating systems. The device drivers are preinstalled in models that come with IBM-preinstalled software. In addition, the device drivers are included on the Ready-to-Configure Utility Program CD that is provided with IntelliStation Z Pro computers. The device drivers are also available on the World Wide Web at http://www.pc.ibm.com/us/intellistation. (Select Support at this Web site.)

Operating System Support

Although a variety of operating systems can be used with IntelliStation Z Pro computers, full function is provided only with Windows NT 4.0 with Service Pack 3. Windows 95 and Windows 98 are supported but will not be preloaded. For a list of operating systems that are compatible with IntelliStation Z Pro computers, refer to the IntelliStation Z Pro User Guide and the IBM online compatibility report on the World Wide Web at http://www.pc.ibm.com/us/intellistation/tech_library.html. Note: Windows NT 4.0 and various support programs are preinstalled in some IntelliStation Z Pro computers. Refer to About Your Software for a detailed description of the preinstallation package. Also, a Ready-to-Configure Utility Program CD is included with all models. The Ready-to-Configure Utility Program CD contains applications and device driver support for the preinstalled operating system (if applicable), and several other operating systems.


IntelliStation Z Pro computers have an Intel Pentium Xeon microprocessor with MMX technology. This is a high-performance processor that is fully compatible with previous generations of Intel microprocessors. It has separate core supply and I/O supply voltages. A voltage regulator on the system board converts the 5.0 V provided by the power supply to the core voltage required by the microprocessor. The Pentium Xeon microprocessor with MMX technology features the following:

More information on the Pentium Xeon processor can be found on the World Wide Web at http://www.intel.com

The microprocessor is packaged on a card with a 330-pin edge connector.

IntelliStation Z Pro (Type 6865) computers support dual microprocessors, which means microprocessor performance can be upgraded by adding a second microprocessor to the system board. If a second microprocessor is added, the speed of the second microprocessor must be the same as that of the primary microprocessor.

6 Copyright IBM Corp. 1999. Chapter 2. System Board Features


Chip Set Control

IntelliStation Z Pro computers use the Intel 82440GX chip set. The primary functions of this chipset are:

The 82440GX module is fully compliant with PCI Local Bus Specification (Version 2.1).

System Memory

The system memory interface in IntelliStation Z Pro computers is controlled by the Intel 82440GX chip set module. (Refer to "Chip Set Control" for information on this module.) There are four dual inline memory module (DIMM) sockets on the system board. The DIMM sockets are powered by +3.3 volts. This voltage allows for low-power operation and supports 64-Mbit technology. For DIMM socket pin assignments, refer to "System Memory Connectors" on page 42.

The system board supports:

Almost any configuration of DIMMs is acceptable. However, DIMMs must have the following characteristics:

PCI-to-ISA Bridge

The PIIX4 chipset module provides the bridge between the peripheral component interconnect (PCI) and industry standard architecture (ISA) buses. The chip is used to convert PCI bus cycles to ISA bus cycles. The PCI bus is compliant with PCI Local Bus Specification 2.1. The PCI bus runs at a frequency of 33 MHz. The ISA bus is permanently set to the PCI bus speed divided by four (8.33 MHz).

For information on PCI and ISA bus expansion connectors, see Appendix A, "Connector Pin Assignments" on page 32.

Chapter 2. System Board Features 7. Chapter 2. System Board Features


System I/O and Power Management

The Intel PIIX4 chipset module that provides the PCI-to-ISA bridge also provides many of the subsystems of the ISA bus. These subsystems are:

AGP Interface

AGP (accelerated graphics port) is a high performance interface directed at 3D graphical display applications. The AGP signals are similar to PCI bus signals with performance extensions added specifically for video functions.

AGP basically creates a preferred access port for video devices into system memory. This allows efficient use of memory resources by mapping system memory as special memory for video use only. One of the primary applications for this memory mapping is for video texture data storage. Video textures are basically templates that are stored in memory and then applied to pixel data at the time of rendering. These textures are typically used in 3D display applications. AGP allows this memory to be mapped from main memory when needed, thus providing potential for high speed 3D rendering while minimizing system cost.

The AGP hardware interface is based on the 64-bit PCI definition with the following features added:

The AGP connector on the system board is defined as a 124-pin high density custom connector for use by AGP enabled video devices only. It does not support generic PCI devices. For configuration purposes, an AGP video adapter will appear as a PCI device attached to the corresponding PCI bus.

IDE Bus Master Interface

The system board incorporates a PCI-to-IDE interface that complies with the AT attachment interface. This interface includes the original IDE (ATA) interface with extensions for Ultra DMA-33. The Intel PIIX4 chipset module contains the controller for the PCI Bus Master IDE interface. The PIIX4 module allows concurrent operations on the PCI and IDE buses. The primary and secondary IDE buses are routed to two connectors on the system board. A total of four IDE or EIDE devices can be attached to the two IDE system board connectors using ribbon cables.

USB Interface

The Intel PIIX4 chipset module contains the controller for the USB interface in IntelliStation Z Pro computers. (Refer to "Chip Set Control" on page 7 for information on the PIIX4 module.) Two USB ports are provided on the rear connector panel of the computers. A USB-enabled device can be attached to each port, and if that device is a hub, multiple peripheral devices can be attached to the hub and be used by the system. Plug and Play technology is used to recognize installed devices. The USB port functions at speeds of up to 1.5 Mbits per second or 12 Mbits per second. Data is transferred in either asynchronous or synchronous mode.

The USB is compliant with Universal Host Controller Interface Design Guide 1.0. Features provided by USB technology include:

Super Input/Output Controller

Control of the integrated input/output (I/O) ports, diskette drive, and real-time clock is provided by the National Semiconductor PC97307 chip. This chip, which is compatible with Plug and Play ISA Specification 1.0a, supports and implements the following features:

Diskette Interface

IntelliStation Z Pro computers support a maximum of two diskette drives and one tape backup drive. diskette interface will support:

Parallel Port

One parallel port is integrated into the system board. Support for extended capabilities port (ECP), enhanced parallel port (EPP), and standard parallel port (SPP) modes is provided. These modes are selected through the Configuration/Setup Utility program, with the default mode set to SPP. The ECP and EPP modes are compliant with IEEE 1284.

Serial Ports

The serial port subsystem consists of two universal asynchronous receiver/transmitters (UARTs) that are PC16550A- and NS16450-compatible. The serial ports include a 16-byte data first-in first-out (FIFO) buffer and have programmable baud rate generators. The UARTs function independently of one another, and both can be used in normal mode, which is inclusive of modem control circuitry. UART2 function is determined at boot time via the Configuration/Setup Utility program and can only be altered by changing setup and rebooting the computer. The following table shows the typical system resource assignments for the serial ports.

Keyboard and Mouse Ports

The keyboard-and-mouse subsystem is controlled by a general purpose, 8-bit microcontroller. The controller consists of 256 bytes of data memory and 2 KB of read-only memory (ROM). The controller has two logical devices; one controls the keyboard, and the other controls the mouse. The keyboard has two fixed I/O addresses and a fixed IRQ line (IRQ1). The keyboard can operate without a companion mouse, but the mouse can only operate with its companion keyboard. The mouse has a fixed IRQ line (IRQ12), but it does not have its own I/O address; it relies on the addresses used by the keyboard.


Video Subsystem

A high-performance, high-resolution graphics adapter provides the video subsystem and monitor connection for IntelliStation Z Pro (Type 6865) computers. The type of graphics adapter installed varies with computer model. One of the following is preinstalled in an expansion slot:

The monitor connector is located on the graphics adapter.

. The Intergraph PCI graphics adapter is a high-performance graphics adapter with a graphics engine, a texture engine, a 16 MB frame buffer, and 16 MB of texture memory. It also provides an expansion

connector to attach an optional geometry accelerator PCI adapter for further performance

enhancement. It has two external connectors.

– The round, 5-pin connector is a stereo sync output jack. This jack provides a connection to the

emitter module of a pair of LCD shutter glasses.

– The blue, 15-pin connector is a monitor port.

. The Matrox AGP adapter is a high-performance, 2D graphics adapter with 8 MB of memory. It has a blue, 15-pin monitor connector and an upgrade connector for multimedia options (MPEG decoding and encoding, video in and out, and TV tuner).

Video Device Drivers

Video device drivers for the graphics adapter are provided on the Ready-to-Configure Utility Program CD that comes with IntelliStation Z Pro computers. Instructions for installing the device drivers are provided on the Ready-to-Configure Utility Program CD in README files that correspond to the operating system being used.

Video device drivers have already been installed in computers that come with IBM-preinstalled software.

Audio Subsystem

IntelliStation Z Pro (Type 6865) computers have an integrated Crystal 4235 audio subsystem that supports SoundBlaster and Microsoft Windows Sound System applications. Three audio ports are also provided. These features provide the ability to play back and capture sound and music, enabling the user to enjoy sound with multimedia applications.

The integrated audio controller provides the following:

. ISA bus interface

. 16-bit codec/mixer

The audio ports in IntelliStation Z Pro (Type 6865) computers are industry-standard, 3.5 mm (1/8") mini-jacks and are located on the rear connector panel of the computer. A description of the audio ports follows.

. Audio Line Out: This jack, which is located on the rear connector panel, is used to send audio signals from the computer to external devices, such as headphones, stereo-powered speakers with built-in amplifiers, multimedia keyboards, or the Audio Line In jack on a stereo system. In order to hear audio, one of these external devices must be connected to the Audio Line-Out port on the computer.

. Audio Line In: This jack is used to send audio signals from an external device (such as a CD player or stereo) to the computer so that the signals can be recorded on the hard disk. (However, the input level must be reduced accordingly using the mixer provided in the computer operating system.)

. Microphone: This jack is used to connect a microphone to the computer so that voice or other sounds can be recorded on the hard disk. This jack can also be used by speech-recognition software.

Chapter 2. System Board Features 15. Chapter 2. System Board Features


Ethernet Subsystem

The system board contains an Intel 82558 Ethernet controller with Wake on LAN. This subsystem is a high-performance Ethernet LAN interface that provides both 10Base-T and 100Base-TX connectivity using a single RJ-45 connector. The Ethernet controller, which is a Plug and Play device and a PCI 2.1 Bus

Master, features the following:

The system board also includes a discrete Wake on LAN controller (MagPack). This controller can be disabled in the Configuration/Setup Utility program.

Small Computer System Interface (SCSI)

IntelliStation Z Pro (Type 6865) computers have a preinstalled Adaptec 2940U2W SCSI PCI adapter that provides an interface through which the computer can communicate with SCSI-compatible devices, such as hard disk drives, CD-ROM drives, tape drives, read-and-write optical drives, scanners, and printers. The Adaptec 2940U2W SCSI PCI adapter has 4 connectors. Two of the connectors (one internal and one external) are for connecting Ultra2 SCSI devices. These are labelled Ultra2-LVD/SE. The other internal 68-pin connector is connecting Fast/Wide Ultra devices. The internal 50-pin connector is for connecting Fast/Ultra Narrow SCSI devices.


System Management Controller

The system board contains a system management chip that monitors the computer at all times looking for potential hardware failures. This chip is programmed with predetermined threshold values for the following:

During system operation, Desktop Management Interface (DMI) code polls the chip and generates an alert if the measured value is outside of the programmed minimum and maximum range. The alert can be provided to a network administrator across a LAN.

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