Intel PR440FX User Manual

PR440FX Motherboard

Technical Product Specification

Order Number: 281829-002 November 1996

The PR440FX motherboard may contain design defects or errors known as errata. Characterized errata that may cause the PR440FX motherboard’s behavior to deviate from published specifications are documented in the PR440FX Motherboard Specification Update.

Revision History

Revision

001

002

Revision History Date

First release of the PR440FX Specification. 08/96 Second release of the PR440FX Specification 11/96

This product specification applies only to standard PR440FX with BIOS identifier 1.00.0x.DI0. Changes to this specification will be published in the PR440FX Motherboard Specification Update

(Order Number: 281832) before being incorporated into a revision of this document.

Information in this document is provided in connection with Intel products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Intel’s Terms and Conditions of Sale for such products, Intel assumes no liability whatsoever, and Intel disclaims any express or implied warranty, relating to sale and/or use of Intel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right. Intel products are not intended for use in medical, life saving, or life sustaining applications.

Intel retains the right to make changes to specifications and product descriptions at any time, without notice. The PR440FX motherboard may contain design defects or errors known as errata. Current characterized errata are available

on request. Contact your local Intel sales office or your distributor to obtain the latest specifications before placing your product order.

†

Third-party brands and names are the property of their respective owners.

Copies of documents which have an ordering number and are referenced in this document, or other Intel literature, may be obtained from:

Intel Corporation P.O. Box 7641 Mt. Prospect, IL 60056-7641

or call in North America 1-800-879-4683, Europe 44-0-1793-431-155, France 44-0-1793-421-777, Germany 44-0-1793-421-333, other Countries 708-296-9333.

1 Motherboard Description

1.1 Overview......................................................................................................................7

1.2 Custom ATX Form Factor............................................................................................9

1.3 Microprocessor ............................................................................................................9

1.3.1 Dual Processor Support ..............................................................................10

1.3.2 Microprocessor Upgrades............................................................................10

1.3.3 VRM Electrical Characteristics.....................................................................10

1.3.4 Microprocessor Fan/Heat Sink Assembly and Clips....................................11

1.4 Memory......................................................................................................................12

1.4.1 Main Memory...............................................................................................12

1.5 Chipset ......................................................................................................................12

1.5.1 82441FX PCI Bridge and Memory Controller (PMC) and

82442FX Data Bus Accelerator (DBX) ........................................................12

1.5.2 82371SB PCI/ISA IDE Xcelerator (PIIX3)....................................................13

1.5.3 Universal Serial Bus (USB) Support............................................................13

1.5.4 IDE Support.................................................................................................14

1.6 I/O Controller .............................................................................................................14

1.6.1 Floppy Controller.........................................................................................15

1.6.2 Keyboard and Mouse Interface ...................................................................15

1.6.3 Real Time Clock, CMOS RAM and Battery .................................................15

1.6.4 Parallel Port.................................................................................................16

1.7 Onboard Networking..................................................................................................16

1.7.1 EtherExpress

1.7.2 Intel 82557 LAN Controller..........................................................................16

1.7.3 10/100 MBps Physical Layer Interface........................................................17

1.7.4 EtherExpress PRO/100B PCI LAN Subsystem Software Description .........17

1.8 SCSI Subsystem........................................................................................................17

1.8.1 SCSI Interface.............................................................................................18

1.8.2 SCSI Bus.....................................................................................................18

1.8.3 SCSI Cable..................................................................................................19

1.8.4 SCSI Bus Termination.................................................................................19

1.8.5 SCSI

1.9 Audio Subsystem.......................................................................................................20

1.10 Management Extension Hardware.............................................................................21

1.11 Motherboard Connectors........................................................................................... 22

1.11.1 CD-ROM Connector - J1E1.........................................................................23

1.11.2 Wavetable Connector - J1B1.......................................................................24

1.11.3 Telephony Connector - J1F1.......................................................................24

1.11.4 Power Connector - J8L1..............................................................................24

1.11.5 Floppy Drive Connector - J12F2..................................................................25

1.11.6 IDE Connectors - J12E1, J12F1..................................................................25

1.11.7 ISA Connectors - J4A1................................................................................26

1.11.8 PCI Connectors - J4A2, J4B1, J4C1, J4D1.................................................27

1.11.9 Primary Processor Fan Connector - J6M1...................................................28

Select

™

PRO/100B PCI LAN Subsystem.........................................16

and SCSI Disk Utilities .............................................................20

Contents

iii

PR440FX Motherboard Technical Product Specification

1.11.10 Secondary Processor Fan Connector - J2J1...............................................28

1.11.11 Card Slot Fan Connector - J13C1 ...............................................................29

1.11.12 SCSI Hard Drive Front Panel LED Connector LED - J13G1........................29

1.11.13 VRM Connector - J7K1................................................................................29

1.11.14 Serial Port 2 Header - J8J1.........................................................................30

1.11.15 SCSI Connector - J12D1.............................................................................30

1.12 Front Panel Connectors.............................................................................................31

1.12.1 Front Panel Connectors - J12G1.................................................................32

1.13 Back Panel I/O Connectors .......................................................................................34

1.14 Jumper Settings......................................................................................................... 35

1.14.1 Setup Access (J12B1-A).............................................................................3 6

1.14.2 Flash Mode (J12B1-B).................................................................................36

1.14.3 CMOS Settings (J12B1-C)...........................................................................36

1.14.4 Password (J12B1-D) ...................................................................................36

1.14.5 Processor Clock Speed (J12B1-E, F, G, and H)..........................................37

1.14.6 DIMM Speed (J12B1-M)..............................................................................37

1.15 Reliability ...................................................................................................................37

1.16 Environmental............................................................................................................ 38

1.17 Power Consumption ..................................................................................................38

1.17.1 Power Supply Considerations .....................................................................39

1.18 Regulatory Compliance..............................................................................................39

1.18.1 Safety..........................................................................................................39

1.18.2 Electromagnetic Interference (EMI).............................................................40

1.18.3 Product Certification Markings.....................................................................40

1.18.4 Use Only for Intended Applications.............................................................40

2 Motherboard Resources

2.1 Memory Map..............................................................................................................41

2.2 I/O Map......................................................................................................................41

2.3 PCI Configuration Space Map...................................................................................4 3

2.4 DMA Channels...........................................................................................................43

2.5 Interrupts ...................................................................................................................44

3 Motherboard BIOS and Setup Utility

3.1 Introduction................................................................................................................45

3.2 BIOS Flash Memory Organization.............................................................................45

3.3 Secure Flash..............................................................................................................45

3.4 BIOS Upgrades..........................................................................................................45

3.5 PCI IDE Support........................................................................................................46

3.6 PCI Auto-configuration...............................................................................................46

3.7 ISA Plug and Play......................................................................................................47

3.8 Desktop Management Interface.................................................................................47

3.9 Advanced Power Management..................................................................................47

3.10 Language Support.....................................................................................................48

3.11 Boot Options..............................................................................................................48

3.12 Flash Logo Area ........................................................................................................48

3.13 Setup Enable Jumper................................................................................................49

Contents

3.14 BIOS Setup Program.................................................................................................49

3.14.1 Overview of the Setup Menu Screens.........................................................49

3.14.2 Main Screen................................................................................................50

3.14.3 Floppy Options Subscreen..........................................................................51

3.14.4 Primary/Secondary IDE Master/Slave configuration Subscreens................52

3.14.5 Boot Options Subscreen .............................................................................53

3.14.6 Advanced Screen........................................................................................55

3.14.7 Peripheral Configuration Subscreen............................................................56

3.14.8 Advanced Chipset Configuration Subscreen...............................................60

3.14.9 Power Management Configuration Subscreen............................................61

3.14.10 Plug and Play Configuration Subscreen......................................................62

3.14.11 Event Logging Configuration.......................................................................63

3.14.12 Single Bit ECC Events Subscreen...............................................................64

3.14.13 Multiple Bit ECC Events Subscreen ............................................................65

3.14.14 Pre-Boot Events Subscreen........................................................................65

3.14.15 Security Screen...........................................................................................66

3.14.16 Security Screen Options..............................................................................66

3.14.17 Exit Screen..................................................................................................67

4 SCSI

4.1 SCSI

4.2 SCSI Disk Utilities......................................................................................................74

Select

4.1.1 Main Screen................................................................................................69

4.1.2 Configuration Menu.....................................................................................69

4.1.3 Boot Device Configuration...........................................................................70

4.1.4 SCSI Device Configuration Menu................................................................71

4.1.5 Advanced Configuration Options.................................................................72

4.2.1 Format Disk.................................................................................................74

4.2.2 Verify Disk Media.........................................................................................74

and SCSI Disk Utilities

Select

Utility.......................................................................................................69

5 Error Messages and Beep Codes

5.1 BIOS Beep Codes.....................................................................................................75

5.2 PCI Configuration Error Messages............................................................................75

5.3 BIOS Error Messages................................................................................................76

5.4 ISA NMI Messages....................................................................................................77

5.5 Port 80h POST Codes...............................................................................................77

PR440FX Motherboard Technical Product Specification

Tables

1. VRM Electrical Characteristics...................................................................................10

2. VRM Voltage Ranges................................................................................................11

3. Tach Fan Specifications ............................................................................................11

4. EtherExpress PRP/100B PCI Drivers ........................................................................17

5. Configuration Jumpers...............................................................................................36

6. Jumpers for Processor / System Speed.....................................................................37

7. Jumpers for DIMM Speed..........................................................................................37

8. Motherboard Environmental Specifications................................................................38

9. DC Voltage................................................................................................................3 8

10. Power Usage.............................................................................................................39

11. Memory Map..............................................................................................................41

12. I/O Map......................................................................................................................41

13. PCI Configuration Space Map ...................................................................................4 3

14. DMA Channels...........................................................................................................4 3

15. Interrupts ...................................................................................................................44

16. Flash Memory Organization.......................................................................................45

17. Recommendations for Configuring an ATAPI Device ................................................46

18. Overview of Menu Screens ........................................................................................49

19. Administrative and User Password Functions............................................................66

20. Overview of the SCSI

Select

Keys..............................................................................69

Figures

1. Motherboard Features.................................................................................................8

2. Motherboard Dimensions.............................................................................................9

3. Functional Block Diagram of LAN Subsystem ...........................................................16

4. SCSI Bus Topology ...................................................................................................18

5. Motherboard Connectors...........................................................................................22

6. Front Panel Connectors.............................................................................................31

7. Back Panel I/O Connectors .......................................................................................34

8. Jumper Block Locations.............................................................................................35

Motherboard Description

1 Motherboard Description

1.1 Overview

The PR440FX motherboard supports dual Intel Pentium Pro processors operating at 180 MHz or 200 MHz. Other features include the following:

• Custom ATX form factor

• Two 387-pin Socket 8 type processor sockets

• Four DIMM sockets for up to 512 MB EDO memory

• 256 KB or 512 KB second-level cache memory in Pentium Pro processor

• Intel 82440FX PCIset  PCI and Memory Controller (PMC) and Data Bus Accelerator (DBX)  82371SB PCI/ISA IDE Xcelerator (PIIX3)

• Two Universal Serial Bus (USB) interfaces

• Three PCI slots and one shared slot that can support a PCI or ISA add-in card

• National Semiconductor PC87308 integrated I/O controller

• Intel EtherExpress

• Adaptec

• Crystal

• Independent voltage and fan speed sensing for each processor

• Desktop Management Interface (DMI) included in BIOS

†

7880 SCSI controller

†

CS4236 audio subsystem

™

PRO/100B PCI LAN subsystem

PR440FX Motherboard Technical Product Specification

C D L

F KJG

P Q

R S

YWX

OM04737A

Figure 1. Motherboard Features

A Wavetable connector P Primary processor fan connector B PCI add-in card connectors Q VRM connector C CD-ROM audio connector R Power supply connector D Telephony connector S Serial port 2 header E Audio connector (Mic In) T Floppy drive connector F MIDI/Game Port U Front panel I/O header G Audio connector (Line Out) V SCSI front panel LED connector H RJ-45 Ethernet connector W PCI IDE connectors I Dual USB connectors X SCSI connector J Serial port 1 connector Y Card slot fan connector K Parallel port connector Z Configuration jumper block

†

L PS/2 M Secondary processor fan connector BB Memory speed jumper block N Primary processor socket CC DIMM connectors O Secondary processor socket DD ISA add-in card connector

mouse and PS/2 keyboard AA Battery

Motherboard Description

OM04737C

3.35

0.65

12.70

11.4

0.30

0.0

11.35

3.10 4.90

11.10

12.30

6.2

1.2 Custom ATX Form Factor

The PR440FX motherboard is designed to fit into an ATX form factor chassis. Figure 2 illustrates the mechanical form factor of the motherboard.

Figure 2. Motherboard Dimensions

1.3 Microprocessor

The PR440FX motherboard supports 2.1 V to 3.5 V Intel Pentium Pro processors operating at 180 MHz and 200 MHz. For motherboards with two processors installed, a voltage regulator module (VRM) is required for the second processor.

The Pentium Pro processor integrates an internal nonblocking second-level (L2) cache and cache controller. The motherboard supports processors with 256 KB or 512 KB L2 cache.

The Pentium Pro processor maintains full backward compatibility with the 8086, 80286,

™

Intel386

, Intel486™ and Pentium processors. It also has a numeric coprocessor that significantly

increases the speed of floating point operations and complies with ANSI/IEEE standard 754-1985.

PR440FX Motherboard Technical Product Specification

AAAA

1.3.1 Dual Processor Support

The dual processor support for the PR440FX motherboard consists of the following:

• Two Socket 8 ZIF processor sockets

• Voltage regulator module (VRM) socket for a VRM, which provides power to the secondary

processor

• BIOS support for either MPS v1.1 or MPS v.1.4 operating systems

1.3.2 Microprocessor Upgrades

Two microprocessor upgrades are available:

• Single to dual processors

• Upgrade from 180 MHz Pentium Pro processor to 200 MHz Pentium Pro processor

CAUTION

The second processor must be the same speed and second-level cache size as the primary processor. The second processor must also be the same stepping as, or no more than one stepping higher than, the primary processor.

1.3.3 VRM Electrical Characteristics

Motherboards with two processors require a VRM. There are two types of VRMs: 5 V and 12 V. The PR440FX motherboard supports 5 V modules. Table 1 shows the electrical characteristics of the VRM.

Table 1. VRM Electrical Characteristics

Parameter Value

Input Voltage 5 V ± 5% Output Current 12.4A Efficiency >40% at low current, >80% at full current Slew rate 30 A/µS at its pins Maximum secondary input voltage

source current DC Output Current

Parameter Value

min

max

(Overshoot lasting 15 µS) 13 Amps

peak

250 mA

0.3 Amps

12.4 Amps

Motherboard Description

Pentium Pro processor-based systems require voltage levels between the minimum and maximum levels shown in Table 2. The voltage level required by the system depends on the speed of the Pentium Pro processor. The Icc column represents Intel’s current requirement for a Pentium Pro processor operating in this voltage range.

Table 2. VRM Voltage Ranges

Voltage Minimum Voltage Maximum Icc

2.4 Volts 3.4 Volts 12.4 Amps

1.3.4 Microprocessor Fan/Heat Sink Assembly and Clips

CAUTION

Do not use the older style of bail-wire clips for securing the fan/heat sink assembly. These clips could damage the motherboard if installed or removed incorrectly.

In an ATX v. 1.1 compliant chassis, the chassis’s power supply provides the fan for the primary processor; the primary processor must also have a heat sink for proper thermal dissipation. The secondary processor must have an active fan/heat sink assembly for proper thermal dissipation. The heat sink assembly must be securely fastened to the Socket 8 ZIF socket by clips.

1.3.4.1 Secondary Processor Fan

In dual processor systems where both processors have a fan/heat sink assembly, both tach fans must comply with the specifications in Table 3.

Table 3. Tach Fan Specifications

Parameter Value

Operating voltage range 10.2 - 13.8 VDC Current (worst case) 80 mA Air Volume (worst case) at zero pressure 9.9 CFM Static Pressure (worst case) at zero air flow 0.051 inch H2O Noise (worst case) 25 dB @ 1 m Initial RPM (nominal) 2800 ± 600 Size 60 x 60 x 10 mm, screw centers 50 x 50 mm Tachometer output 2 cycles per revolution

PR440FX Motherboard Technical Product Specification

1.4 Memory

1.4.1 Main Memory

The motherboard has four DIMM sockets. Minimum memory size is 16 MB and maximum memory size is 512 MB. The motherboard supports the following memory types, speeds, and module sizes:

• 168-pin 3.3 V DIMMs with gold-plated contacts

• 50 ns and 60 ns buffered asynchronous EDO memory

• Parity and ECC memory

• 2 MB x 72 (16 MB), 4 MB x 72 (32 MB), 8 MB x 72 (64 MB) and 16 MB x 72 (128 MB)

modules

NOTE

✏

Parity memory operates in ECC mode unless you disable memory error detection in the BIOS Setup program (see section 3.14.8.4).

1.5 Chipset

The Intel 82440FX PCIset consists of the 82441FX PCI Bridge and Memory Controller (PMC) and the 82442FX Data Bus Accelerator (DBX). The Intel 82371SB PCI ISA/IDE Xcelerator (PIIX3) bridge provides the connection between the ISA and PCI buses.

1.5.1 82441FX PCI Bridge and Memory Controller (PMC) and 82442FX Data Bus Accelerator (DBX)

Two devices from the Intel 82440FX chipset, the PMC and DBX, form the core of the motherboard design. As the host bridge function between the Pentium Pro processors and PCI I/O system, these devices maintain proper ordering of operations by trapping synchronization events and flushing buffers. The PMC also acts as memory controller for the system with the DBX providing the data path to memory

1.5.1.1 82441FX PCI Bridge and Memory Controller (PMC)

The 82441FX comes in a 208-pin QFP package that features:

• Processor interface control  Up to 66 MHz external bus speed  32-bit addressing

• Integrated DRAM controller  72-bit non-interleaved path to memory with ECC support  ECC is implemented as single-bit error checking and correction and multi-bit error

checking and detection

Motherboard Description

 Support for EDO DRAM  16 MB to 512 MB main memory

• Fully synchronous PCI bus interface  PCI Rev. 2.1 V compliant  Up to 33 MHz bus speed  PCI to DRAM > 100 MBps

• Data Buffering  Processor-to-DRAM and PCI-to-DRAM write data buffering

1.5.1.2 82442FX Data Bus Accelerator (DBX)

The DBX connects to the 64-bit Pentium Pro processor data bus, the 72-bit memory data bus and the 16-bit PMC private data bus. The DBX works in parallel with the PMC to provide a high performance memory subsystem for Pentium Pro processor-based systems. The DBX comes in a 208-pin QFP package.

1.5.2 82371SB PCI/ISA IDE Xcelerator (PIIX3)

The PIIX3 provides the interface between the PCI and ISA buses and integrates a dual channel enhanced IDE interface capable of supporting up to four devices. The PIIX3 comes in a 208-pin QFP package that features:

†

• PCI-to-AT

• ISA refresh address generation

• Interface between the PCI and ISA buses

• Universal Serial Bus controller  Host/hub controller

• Integrated enhanced IDE interface  Support for up to four devices  Programmed Input/Output (PIO) Mode 4 transfers up to 16 MB/sec  Integrated 8 x 32-bit buffer for bus master PCI IDE burst transfers  Bus master mode

• PCI 2.1 compliance

• Enhanced DMA controller

• Interrupt controller and interrupt steering

• Counters/timers

• SMI (System Management Interrupt) interrupt logic and timer with fast on/off mode

• NMI logic

interrupt mapping circuitry

1.5.3 Universal Serial Bus (USB) Support

NOTE

✏

Computer systems that have an unshielded cable attached to the USB port may not meet FCC Class B requirements even if no device or a low-speed (sub-channel) USB device is attached to the cable. Use a shielded cable that meets the requirements for high-speed (fully rated) devices.

PR440FX Motherboard Technical Product Specification

The motherboard has two USB ports. This permits direct connection of two USB peripherals without an external hub. If more devices are required, an external hub can be connected to either port. The motherboard supports the standard Universal Host Controller Interface (UHCI). Features of the USB include:

• Hot Pluggable

• Self-identifying peripherals

• Automatic mapping of function to driver and configuration

• Support for isochronous and asynchronous transfer types over the same set of wires

• Support for up to 127 physical devices

• Guaranteed bandwidth and low latencies appropriate for telephony, audio, and other

applications

• Error handling and fault recovery mechanisms built into the protocol

1.5.4 IDE Support

The motherboard has two independent high-performance bus-mastering PCI/IDE interfaces capable of supporting PIO Mode 3, PIO Mode 4, and ATAPI devices. The system BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head Sector (ECHS) translation modes. The IDE device transfer rate and translation mode capability is automatically determined by the system BIOS.

Normally, programmed I/O operations require a substantial amount of processor bandwidth. In

†

true multi-tasking operating systems like Windows NT

, the processor bandwidth freed by using bus mastering IDE can be used to complete other tasks while disk transfers are occurring. When used in conjunction with the appropriate driver for the operating system, the IDE interface can operate as a PCI bus master capable of supporting PIO Mode 4 devices with transfer rates of up to 16 MB/sec.

Detailed information on the PCIset is available in the Intel 82440FX PCIset data sheet.

1.6 I/O Controller

Control for the integrated into a single component, the National Semiconductor PC87308. The PC87308 is a Plug and Play device that features:

• Two NS16C550-compatible UARTs with send/receive 16-byte FIFO

• Multi-mode bidirectional parallel port

†

 Standard mode; IBM  Enhanced Parallel Port (EPP) with BIOS/Driver support  High Speed mode; Extended Capabilities Port (ECP) compatible

• Industry standard floppy controller with 16-byte FIFO (2.88 MB floppy support)

• Integrated real-time clock with century calendar functionality

• Integrated 8042-compatible keyboard controller

and Centronics† compatible

The PC87308 is normally configured automatically by the BIOS, but configuration of these interfaces is also possible using Setup. The serial ports can support any address configuration.

Motherboard Description

1.6.1 Floppy Controller

The PC87308 is software compatible with the DP8473 and 82077 floppy disk controllers. The floppy interface can be configured in Setup for:

• 5¼ inch media

 360 KB  1.2 MB

• 3½ inch media

 720 KB  1.2 MB (read/write only, no format capability)  1.44 MB  2.88 MB

By default, the Floppy A interface is configured for 1.44 MB and Floppy B is disabled. Configuring the floppy interface for 1.2 MB, 3½ inch (3-mode floppy) requires a driver.

1.6.2 Keyboard and Mouse Interface

PS/2 keyboard/mouse connectors are located on the back panel side of the motherboard. The 5 V lines to these connectors are protected with a PolySwitch healing fuse, re-establishing the connection after an over-current condition is removed. While this device eliminates the possibility of having to replace a fuse, take care to turn off the system power before installing or removing a keyboard or mouse.

The I/O controller contains the AMI Megakey keyboard/mouse controller code which, besides providing traditional keyboard and mouse control functions, supports Power-On/Reset (POR) and password protection. You can define the POR password with Setup. The keyboard controller also provides for the following hot-key sequences:

• <Ctrl> <Alt> <Del>: System software reset. This sequence performs a software reset of the

system by jumping to the beginning of the BIOS code and running the POST operation.

• <Ctrl> <Alt> <defined in Setup>: Power management key sequences take advantage of the

processor’s System Management Mode (SMM) features to greatly reduce the system’s power consumption while maintaining the responsiveness necessary to service external interrupts.

• <Ctrl> <Alt> <defined in Setup>: Keyboard secure hot keys lock the keyboard until you enter

the password.

†

circuit which acts much like a self-

1.6.3 Real Time Clock, CMOS RAM and Battery

The integrated real-time clock (RTC) is compatible with DS1287 and MC146818 components. It provides a time of day clock, a 100-year calendar with alarm features, and a century register. You can set RTC in Setup. The RTC also supports 256-byte battery-backed CMOS RAM in two banks which is reserved for BIOS use. You can set the CMOS RAM to specific values or clear the CMOS RAM to system default values using Setup. You can also clear the CMOS RAM values to system defaults by using a configuration jumper on the motherboard.

An external coin-cell style battery provides power to the RTC and CMOS memory. The battery has an estimated lifetime of seven years and is socketed for easy replacement. When the system is on, the life of the battery is extended by a trickle current from the power supply.

PR440FX Motherboard Technical Product Specification

1.6.4 Parallel Port

A 25-pin D-Sub header is provided on the back panel for a multi-mode bidirectional parallel port. The parallel port operates in standard mode, EPP version 1.7 mode (BIOS and driver support) or a high speed ECP compatible mode. EPP Mode requires a driver provided by the peripheral manufacturer to operate correctly.

1.7 Onboard Networking

1.7.1 EtherExpress™ PRO/100B PCI LAN Subsystem

The EtherExpress PRO/100B PCI LAN optional subsystem is a high performance Ethernet† LAN interface that provides both 10Base-T and 100Base-TX connectivity. Features include:

• 32-bit direct bus mastering on the PCI bus

• Shared memory structure in the host memory that copies data directly to/from host memory

• 10Base-T and 100Base-TX capability using a single RJ-45 connector

• IEEE 802.3µ Auto-Negotiation for hardware selection of the highest operating speed

• Jumperless configuration; the LAN subsystem is totally software configurable

The following block diagram provides an overview of the LAN subsystem architecture.

10Mbps Xmit/Rcv

RJ-45

Connector

Common Magnetic

Module

100Mbps Xmit/Rcv

DP8322 3

"Twister"

PCI Local Bus

DP83840

100BASE-TX

PHY

MII

Intel

82557

Figure 3. Functional Block Diagram of LAN Subsystem

1.7.2 Intel 82557 LAN Controller

This device is the heart of the LAN subsystem and provides the following functions:

• CSMA/CD Protocol Engine

• PCI bus interface

• DMA engine for movement of commands, status, and network data across the PCI bus

• Access to EEPROM

• Standard MII interface for access to IEEE 802.3µ-compliant physical layer devices

EEPRO M

OM04782

Motherboard Description

1.7.3 10/100 MBps Physical Layer Interface

The physical layer interface is implemented in two devices from National Semiconductor, the DP83840 and the DP83223. The DP83840 provides:

• Complete functionality necessary for the 10Base-T interface; directly drives the cable when in

10 MBps mode

• All functionality required for the 100Base-TX interface except for the NRZ to MLT3

encoding/decoding function, which is provided by the DP83223 Twister device

• Complete set of MII management registers for control and status reporting

• 802.3µ Auto-Negotiation for automatically establishing the best possible operating mode when

connected to other 10Base-T or 100Base-TX devices, whether capable of half or full-duplex operation

1.7.4 EtherExpress PRO/100B PCI LAN Subsystem Software Description

The software provided with the LAN subsystem includes setup/diagnostic software (SETUP.EXE), a readme file viewer (README.EXE) and the following drivers:

Table 4. EtherExpress PRP/100B PCI Drivers

Driver Description Environment(s)

E100BODI.COM Novell ODI NetWare† DOS Client E100BODI.SYS Novell ODI NetWare OS/2† Client E100B.LAN Novell ODI NetWare 3.11 Server

NetWare 3.12 Server NetWare 4.x Server NetWare NT Requester NetWare for OS/2

†

E100B.DOS NDIS 2.0.1 Windows

MS-DOS

E100B.OS2 NDIS 2.0.1 MS OS/2 1.3

IBM OS/2 2.11 IBM OS/2 Warp

E100B.SYS NDIS 3.1 Windows 95

Windows NT 3.5x

for Workgroups 3.11

†

LANMAN 2.1

1.8 SCSI Subsystem

The onboard SCSI subsystem features the Adaptec AIC-7880, which contains a double-speed SCSI controller and a PCI bus master interface in a 160-pin PQFP. The AIC-7880 supports the following:

• 8- or 16-bit fast SCSI providing 10 MB per second or 20 MB per second throughput, or

• Double-speed SCSI that can burst data at 20 MB per second or 40 MB per second

As a PCI bus master, the AIC-7880 supports burst data transfers on the PCI bus up to the maximum rate of 133 MB per second using the on-chip 256-byte FIFO.

PR440FX Motherboard Technical Product Specification

1.8.1 SCSI Interface

The AIC 7880 also offers active negation outputs and a disk activity output signal. Active negation outputs reduce the chance of data errors by actively driving both polarities of the SCSI bus, avoiding indeterminate voltage levels and common-mode noise on long cable runs. The SCSI output drivers can directly drive a 48 mA single-ended SCSI bus with no additional drivers. Synchronous SCSI can handle up to 15 REQ control signals simultaneously.

1.8.2 SCSI Bus

The SCSI data bus is 8- or 16-bits wide with odd ECC generated per byte. SCSI control signals are the same for either bus width. The motherboard has an onboard SCSI connector that supports 8- or 16-bit devices. On a 16-bit wide SCSI bus, the AIC-7880 assigns the highest arbitration priority to the low byte of the 16-bit word. This way, 16-bit targets can be mixed with 8-bit targets if the 8-bit devices are placed on the low data byte. During chip powerdown, all inputs are disabled to reduce power consumption.

1.8.2.1 SCSI Bus Topology

The following diagram shows how the SCSI bus is implemented.

Last

Internal

Device

Internal SCSI Devices

Internal

SCSI

Cable

OM05664a

External

SCSI

Cable

External

SCSI

Device

Chassis

Terminator

Card

Motherboard

Figure 4. SCSI Bus Topology

From end to end, the SCSI bus cable is routed from the last internal SCSI device to each internal device. From the last internal device, the cable connects to the motherboard, where the SCSI controller resides. The cable can then continue to an optional terminator card installed in an unused I/O slot of the chassis. From the terminator card, an optional external SCSI cable can be used to connect external SCSI devices.

Motherboard Description

1.8.3 SCSI Cable

For proper operation of ultra/wide SCSI devices, the overall length of the SCSI cable from the last internal device to the last external device should not exceed three meters (within constraints as

defined by ANSI SCSI-3 Specification). The recommended length for the internal SCSI cable (from the last internal device to the terminator card) is 42 inches. For more information, see the ANSI SCSI-3 Specification.

1.8.4 SCSI Bus Termination

Terminate the extreme ends of the SCSI bus (cable), typically by connecting a terminated device to the end connectors of the cable:

• On the last connector of the internal cable (farthest from the motherboard), attach either a

terminated 16-bit device or some other type of 16-bit termination (see Note).

• If the internal cable ends at the motherboard, enable motherboard termination in the SCSI

BIOS (on bootup press <Ctrl><A> to enter the SCSISelect

• If the internal cable continues from the motherboard to a termination card, disable motherboard

termination in the SCSI BIOS (using SCSISelect). The terminator card provides the end termination, unless you attach an external cable.

• If an external SCSI cable is attached to the terminator card, its termination is disabled

automatically. On the last connector of the external cable, attach either a terminated 16-bit device or some other type of 16-bit termination (see Note).

†

utility).

Disable termination on all other SCSI devices attached to the cable (except the devices attached to the extreme ends).

NOTE

✏

A 68-pin connector on the motherboard supports 8-bit and wide 16-bit SCSI devices. Eight-bit devices require a 68- to 50-pin adapter. In general, if you use an 8-bit device to terminate the SCSI bus, you must attach it using a 68-to-50-pin SCSI adapter with high-byte termination, so that all 16 data bits are terminated.

1.8.4.1 Using Only 16-bit SCSI Devices

• Enable termination only on the device(s) attached to the last connector (internal and/or

external).

• Remove or disable termination on all devices that are not on the last connector of the cable(s).

1.8.4.2 Mixing 8-and 16-bit SCSI Devices

• When mixing 8- and 16-bit devices, each 8-bit device must have a 68-to-50 pin adapter.

• Enable termination only on the device(s) attached to the last connector (internal and/or

external). If you use an 8-bit device to provide termination, attach it using a 68-to-50-pin SCSI adapter with high-byte termination, so that all 16 data bits are terminated.

• Remove or disable termination on all devices that are not on the last connector of the cable(s).

PR440FX Motherboard Technical Product Specification

1.8.4.3 Using Only 8-bit SCSI Devices

• Enable termination only on the device(s) attached to the last connector (internal and/or

external). Attach the 8-bit device to provide termination using a 68-to-50-pin SCSI adapter with high-byte termination, so that all 16 data bits are terminated.

• Remove or disable termination on all devices that are not the last device on the cable(s).

NOTE

✏

Examine the gender and polarities of connectors, adapters, and terminators to assure proper termination and connection to the low or high byte of the bus.

1.8.5 SCSI

See Section 4.0.

Select

and SCSI Disk Utilities

1.9 Audio Subsystem

The motherboard features a 16-bit stereo audio subsystem. The audio subsystem is based upon the Sound Blaster audio and analog mixing functions required for playing and recording audio on personal computers including:

• Stereo analog-to-digital and digital-to-analog converters

• Analog mixing, anti-aliasing and reconstruction filters

• Line and microphone level inputs

• Digital audio compression using selectable A-law or µlaw rules

• Full digital control of all mixer and volume control functions

With the integrated Sound Blaster OPL3 compatible FM synthesizer, the CS4236 also provides support for four major sound standards including Adlib and Sound Blaster Pro 2.0, Windows Sound System and MPU-401 to meet all of the requirements of today’s multimedia applications. The CS4236 also supports full-duplex operation to support future applications such as video conferencing.

The CS4236 includes a Plug and Play ISA interface and comprises six logical devices including:

• Synthesizer

• MIDI/Game Port

• Sound Blaster

• Microsoft

• MPU-401

• CS4236 device

†

compatible Crystal CS4236 multimedia codec. The CS4236 provides the digital

†

Sound System

Each logical device is configured into the host environment using ISA Plug and Play configuration. The audio subsystem requires two interrupts and up to two DMA channels. The system can be configured to use either DMA channels 0, 1, or 3. The interrupt can be mapped to interrupt 5, 7, 9, 10, 11, or 15.

Motherboard Description

Address (hex)

80h

85h

86h

1.10 Management Extension Hardware

The Management Extension hardware provides low-cost instrumentation capabilities. The hardware implementation is a single-chip ASIC. Features include the following:

• An integrated temperature sensor for internal chassis temperature

• Three fan-speed sensors

• Power supply voltage monitoring to detect levels above or below acceptable values

• Registers for storing power on self test (POST) hardware test results and error codes

• Optical sensor for detection of physical intrusion (such as when the chassis lid has been

removed) even when the power is off (this feature is chassis dependent)

• Remote reset capabilities from a remote peer or server through LANDesk Client Manager,

Version 3.0 and service layers (when available)

• Hardware compatibility with Windows NT, Windows 95, and Windows† 3.1 When an out-of-range condition (temperature, fan speed, or voltage) is reached, a System

Management Interrupt (SMI) is activated. The Management Extension circuitry connects to the ISA bus as an 8-bit I/O mapped device and uses these I/O addresses:

Description

Monitors and stores POST codes Address and control functions Register read/write operations

PR440FX Motherboard Technical Product Specification

1.11 Motherboard Connectors

Figure 5 shows the connectors on the motherboard. Following figure 5 are the pins and signal names for each connector. For front panel connectors, see section 1.12. For back panel connectors, see section 1.13.

J1B1

Wave Table

J1E1

CD-ROM Audio

Telephony

J1F1

J4A1

ISA

PCI #1 - J4A2 PCI #2 - J4B1 PCI #3 - J4C1 PCI #4 - J4D1

PCI IDE(2)

Secondary - J12E1

Primary - J12F1

J2J1

1 3

CPU2 Fan

J6M1

1 3

CPU1 Fan

Floppy

Drive

J12F2

J13C1

Card Slot

Fan

1 3

J13G1

SCSI

Hard Drive

Front Panel

LED

J8L1

Power

OM04737E

Figure 5. Motherboard Connectors

continued ☛

Motherboard Description

J7K1

DIMM #1 DIMM #2 DIMM #3 DIMM #4 -

J12D1

J7D2 J7E1 J7E2 J7F1

VRM

J8J1

COM 2 Header

SCSI

Figure 5. Motherboard Connectors (continued)

1.11.1 CD-ROM Connector - J1E1

Pin Signal Name

1 Ground 2 CD-Left 3 Ground 4 CD-Right

OM05882

PR440FX Motherboard Technical Product Specification

1.11.2 Wavetable Connector - J1B1

Pin Signal Name

1 Wave Right 2 Ground 3 Wave Left 4 Ground 5 Key 6 Ground 7 N/C 8 MIDI-Out

1.11.3 Telephony Connector - J1F1

Pin Signal Name

1 Ground 2 Mono Out 3 Mic In 4 Key

1.11.4 Power Connector - J8L1

When used with a power supply that supports Remote On/Off, the motherboard can turn off the system power under software control. The BIOS turns the computer power off when it receives the proper APM command from the operating system. For example, Windows 95 issues an APM command when the user selects the Shutdown the Computer option. APM must be enabled in the BIOS and the operating system in order for Soft Off to work correctly. APM determines the status of the power supply system responses. For example, if the power is disconnected and computer is switched on, the computer’s response is to either turn back on when power is reapplied or remain off. The response is predetermined by the configuration in Setup. Also see 1.12.1.4 Remote On/Off and Soft Power Support.

Pin Signal Name Pin Signal Name

1 +3.3V 11 +3.3V 2 +3.3V 12 -12V 3 Ground 13 Ground 4 +5V 14 PS-ON 5 Ground 15 Ground 6 +5V 16 Ground 7 Ground 17 Ground 8 PW-OK 18 -5V 9 +5VSB 19 +5 10 +12V 20 +5V

1.11.5 Floppy Drive Connector - J12F2

Pin Signal Name Pin Signal Name

1 Ground 2 DENSEL 3 Ground 4 Reserved 5 Key 6 FDEDIN 7 Ground 8 Index# 9 Ground 10 Motor Enable A# 11 Ground 12 Drive Select B# 13 Ground 14 Drive Select A# 15 Ground 16 Motor Enable B# 17 MSEN1 18 DIR# 19 Ground 20 STEP# 21 Ground 22 Write Data# 23 Ground 24 Write Gate# 25 Ground 26 Track 00# 27 MSEN0 28 Write Protect# 29 Ground 30 Read Data# 31 Ground 32 Side 1 Select# 33 Ground 34 Diskette Change#

Motherboard Description

1.11.6 IDE Connectors - J12E1, J12F1

Pin Signal Name Pin Signal Name

1 Reset IDE 2 Ground 3 Host Data 7 4 Host Data 8 5 Host Data 6 6 Host Data 9 7 Host Data 5 8 Host Data 10 9 Host Data 4 10 Host Data 11 11 Host Data 3 12 Host Data 12 13 Host Data 2 14 Host Data 13 15 Host Data 1 16 Host Data 14 17 Host Data 0 18 Host Data 15 19 Ground 20 Key 21 DDRQ0 [DDRQ1] 22 Ground 23 I/O Write# 24 Ground 25 I/O Read# 26 Ground 27 IOCHRDY 28 Vcc pull-up 29 DDACK0# [DDACK1#] 30 Ground 31 IRQ14 (IRQ15) 32 Reserved

continued

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