Intel AP440FX User Manual

AP440FX Motherboard

Technical Product Specification

May, 1997
Order Number 281830-002

The AP440FX motherboard may contain design defects or errors known as errata which may cause the product to deviate from published specifications. Current characterized
errata are documented in the AP440FX Motherboard Specification Update.

Revision History

Revision

-001

-002

Revision History Date

Release of the AP440FX Technical Product Specification. 7/96
Second release of the AP440FX Technical Product Specification 5/97

This product specification applies only to standard AP440FX motherboards with BIOS identifier

1.00.0x.CT1.
Changes to this specification will be published in the AP440FX Motherboard Specification Update

(Order Number: 281831) 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 AP440FX motherboard may contain design defects or errors known as errata which may cause the product to deviate from

published specifications. Current characterized errata are available on request.
Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order.
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 60056-764
or call 1-800-879-4683

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.

† Third-party brands and names are the property of their respective owners.
Copyright  Intel Corporation, 1996-1997.

Table of Contents

1 Motherboard Description

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

1.2 Motherboard Manufacturing Options ...........................................................................9

1.3 Form Factor.................................................................................................................9

1.4 I/O Shield...................................................................................................................10

1.5 Microprocessor ..........................................................................................................11

1.5.1 Microprocessor Upgrade .............................................................................11

1.5.2 Microprocessor Heatsink and Clips .............................................................11

1.6 Main System Memory................................................................................................12

1.6.1 DRAM..........................................................................................................12

1.6.2 Parity and ECC DRAM ................................................................................12

1.7 Chipset ......................................................................................................................12

1.7.1 82441FX PCI Bridge and Memory Controller (PMC)...................................12

1.7.2 82442FX Data Bus Accelerator (DBX) ........................................................13

1.7.3 82371SB PCI/ISA IDE Xccelerator (PIIX3)..................................................13

1.7.4 IDE Support.................................................................................................14

1.7.5 Secure Flash Support..................................................................................14

1.7.6 USB Support ...............................................................................................14

1.8 PC87307 Super I/O Controller...................................................................................15

1.8.1 Floppy Controller.........................................................................................15

1.8.2 Keyboard and Mouse Interface...................................................................15

1.8.3 Real-Time Clock, CMOS RAM and Battery .................................................16

1.8.4 Infrared Support ..........................................................................................16

1.8.5 Parallel Port.................................................................................................16

1.9 Graphics Subsystem..................................................................................................16

1.9.1 S3 ViRGE Graphics Subsystem..................................................................17

1.9.2 S3 ViRGE/DX Graphics Subsystem............................................................18

1.9.3 LBP VESA Feature Connector....................................................................18

1.9.4 Graphics Drivers and Utilities ......................................................................18

1.10 Audio Subsystem.......................................................................................................19

1.11 Management Extension Hardware.............................................................................1 9

1.12 Motherboard Connectors...........................................................................................20

1.12.1 Front Panel Connectors...............................................................................22

1.12.2 Memory/Expansion Connectors...................................................................25

1.12.3 VESA Feature Connector............................................................................27

1.12.4 Serial Header ..............................................................................................27

1.12.5 Audio Connectors........................................................................................28

1.12.6 Power Supply Connectors...........................................................................29

1.12.7 Floppy/IDE Connectors ...............................................................................30

1.12.8 Back Panel Connectors...............................................................................32

1.13 Jumper Settings.........................................................................................................35

1.13.1 Microprocessor Configuration (J4L2)...........................................................36

1.13.2 Motherboard Configuration (J4L2, J1J1).....................................................36

1.14 Reliability ...................................................................................................................37

iii

AP440FX Motherboard Technical Product Specification

1.15 Environmental............................................................................................................38

1.16 Power Consumption ..................................................................................................38

1.16.1 Power Supply Considerations .....................................................................39

1.17 Regulatory Compliance..............................................................................................39

1.17.1 Safety..........................................................................................................39

1.17.2 EMI..............................................................................................................4 0

1.17.3 Product Certification Markings.....................................................................40

2 Motherboard Resources

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

2.2 I/O Map......................................................................................................................42

2.3 Soft-Off Control..........................................................................................................43

2.4 PCI Configuration Space Map ...................................................................................43

2.5 DMA Channels...........................................................................................................43

2.6 Interrupts ...................................................................................................................44

3 Motherboard BIOS and Setup Utility

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

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

3.3 BIOS Upgrades..........................................................................................................45

3.4 PCI IDE Support........................................................................................................46

3.5 PCI Auto-Configuration..............................................................................................46

3.6 ISA Plug and Play......................................................................................................47

3.7 Desktop Management Interface (DMI).......................................................................47

3.8 Advanced Power Management (APM).......................................................................48

3.9 Advanced Power Control (APC) ................................................................................4 8

3.10 Language Support.....................................................................................................49

3.11 Boot Options..............................................................................................................49

3.12 Flash LOGO Area......................................................................................................49

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

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

3.14.1 Main BIOS Setup Screen ............................................................................50

3.14.2 Floppy Options Subscreen..........................................................................51

3.14.3 IDE Device Configuration Subscreen..........................................................52

3.14.4 Boot Options Subscreen .............................................................................54

3.14.5 Advanced Screen........................................................................................56

3.14.6 Event Logging Configuration.......................................................................57

3.14.7 Peripheral Configuration Subscreen............................................................57

3.14.8 Advanced Chipset Configuration Subscreen...............................................61

3.14.9 Power Management Configuration Subscreen............................................63

3.14.10 Plug and Play Configuration Subscreen......................................................64

3.14.11 Event Logging Configuration.......................................................................66

3.14.12 Security Screen...........................................................................................68

3.14.13 Security Screen Options..............................................................................68

3.14.14 Exit Screen..................................................................................................69

iv

4 Error Messages and Beep Codes

4.1 BIOS Beep Codes .....................................................................................................71

4.2 PCI Configuration Error Messages ............................................................................71

4.3 BIOS Error Messages................................................................................................73

4.4 ISA NMI Messages....................................................................................................74

Figures

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

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

3. Back Panel I/O Shield Dimensions............................................................................1 0

4. Motherboard Connector Locations.............................................................................21

5. Front Panel I/O Connectors.......................................................................................22

6. Fan Connector Usage................................................................................................24

7. I/O Connections.........................................................................................................32

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

Tables

1. Key to Motherboard Features......................................................................................8

2. S3 ViRGE Supported Resolutions.............................................................................17

3. S3 ViRGE/DX Supported Resolutions.......................................................................1 8

4. Front Panel I/O Connector (J2A1) .............................................................................22

5. Keylock Connector (J3A1).........................................................................................24

6. Auxiliary Fan Connector (J4A1).................................................................................24

7. PCI/ISA Riser Connector (J6J2) ................................................................................25

8. LBP VESA Feature Connector (J1K1).......................................................................27

9. Serial Port (COM2H, J3N1) Pinout ............................................................................27

10. CD-ROM Connector (J9N1).......................................................................................28

11. Wavetable Upgrade Connector (J9L1) ......................................................................28

12. Telephony Connector (J9K1).....................................................................................28

13. Primary Power Supply Connector (J9H1) ..................................................................29

14. External 3.3 V Power Supply Connector (J9J1)........................................................29

15. Soft-Off Power Supply Connector (J9F1)...................................................................30

16. Floppy Drive Connector (J8L1)..................................................................................30

17. IDE Connectors (J8H1, J9H2) ...................................................................................3 1

18. VGA Video Connector (J1N1)....................................................................................32

19. Serial Port Connector Pinout .....................................................................................33

20. USB Connector Pinout...............................................................................................33

21. PS/2 Keyboard/Mouse Connector Pinout..................................................................33

22. Parallel Port Connector Pinout...................................................................................34

23. Microprocessor/System Speed Settings....................................................................36

24. Configuration Jumper Settings...................................................................................37

25. Motherboard Environmental Specifications................................................................38

26. Power Usage.............................................................................................................38

27. DC Voltage ................................................................................................................39

28. Memory Map..............................................................................................................41

29. I/O Map......................................................................................................................42

30. PCI Configuration Space Map ...................................................................................43

31. DMA Channels...........................................................................................................43

Contents

v

AP440FX Motherboard Technical Product Specification

32. Interrupts ...................................................................................................................44

33. Flash Memory Organization.......................................................................................4 5

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

35. Overview of the Setup Menu Screens .......................................................................50

36. Serial Port Configuration Options ..............................................................................58

37. Parallel Port Configuration Options............................................................................59

38. ECP - Compatible Configuration Options...................................................................60

39. Event Log Subscreens...............................................................................................67

40. Administrative and User Password Functions............................................................68

41. BIOS Beep Codes .....................................................................................................71

42. PCI Configuration Error Messages ............................................................................71

43. Chained PCI Error Messages....................................................................................72

44. BIOS Error Messages................................................................................................73

45. ISA NMI Messages....................................................................................................74

vi

1 Motherboard Description

1.1 Overview

The AP440FX motherboard is a 64-bit, high-performance, mixed-voltage, energy-conscious,
highly integrated platform. The AP440FX motherboard supports the following set of features:

• Uses a 9-inch by 13-inch LPX form factor.

• Uses a type 8 Zero Insertion Force (ZIF) socket to house the standard processor, and provides

an upgrade path to future OverDrive

• Accepts Pentium

®

Pro processors with core clock frequencies of 150 MHz, 166 MHz,

180 MHz, and 200 MHz.

• Supports up to 128 MB of DRAM using four standard 72-pin, tin-lead SIMM† sockets. The

modules can use Fast Page Mode (FPM) or Extended Data Out (EDO) memory. Non-parity
(32-bit) and parity (36-bit) memory SIMMs are supported. With parity SIMMs, the board can
be configured to support Error Checking and Correcting (ECC) memory operation.

• Uses Intel's 82440FX chipset. The Intel 82371SB PCI/ISA IDE Xccelerator (PIIX3) provides

an integrated Bus Mastering IDE controller with two high performance IDE interfaces for up to
four devices (such as hard drives or CD-ROM).

• Uses a flash BIOS with the following features:

− Uses both hardware and software Secure Flash features to protect flash contents from

corruption.

− Uses a BIOS that complies with the Desktop Management Interface (DMI-compliant).

• Uses the National Semiconductor Super I/O controller (the PC87307 or the pin-compatible

PC87308 device) to integrate the following standard PC I/O functions:

 floppy interface, two FIFO serial ports and one EPP/ECP capable parallel port
 real-time clock
 keyboard controller
 support for an IrDA

†

and Consumer Infrared interface at both slow and medium speeds

• Integrates a Crystal audio codec (CS4236) on the motherboard to provide 16-bit stereo, Sound

Blaster† Pro compatible audio. Provides an onboard telephony (modem) connector to support
the latest telephony applications.

• Integrates an S3† ViRGE/DX† graphics controller onboard to support SVGA graphics at

resolutions up to 1600x1200. An enhanced LBP VESA
multimedia capabilities.

• A hardware monitoring ASIC provides the following monitoring functions:
 Integrated temperature sensor
 Fan speed monitoring
 Power supply voltage monitoring
 Storage of power-on self test (POST) results and error codes

• PCI and ISA expansion slots are supported by a connector on the motherboard designed to

accept a riser card. An onboard jumper supports riser cards with either two or three PCI slots.

®

processors.

†

feature connector supports external

7

AP440FX Motherboard Technical Product Specification

MM

LL
KK
JJ

II

HH
GG
FF

EE

DD

CC

AB

AA

BB

DE H

C

F

G

Z Y X W

I

J
K

L
M

N
O

P
Q

R

S
T

U
V

OM06178

Figure 1. Motherboard Features

Table 1. Key to Motherboard Features

Key Description Key Description Key Description

A VGA† connector B Serial port connector C Side-by-side USB connectors
D PS/2† mouse connector E PS/2 keyboard connector F Parallel port connector
G I/O Controller (U7M1) H Microphone input jack I Audio output jack
J Crystal audio controller (U9M1) K CD-ROM header (4x1, J9N1) L Wavetable header (2x4, J9L1)
M Floppy connector (J8L1) N Telephony (modem) header (2x2,

J9K1)
P Main power connector (J9H1) Q IDE connectors (J8H1, J9H2) R Soft Off header (3x1, J9F1)
S Hardware monitor ASIC (U9C1) T Flash BIOS (E28F002, U8C1) U Real-time clock battery (BT9B1)
V Onboard speaker (L9A1) W 3.5 V processor jumper (J8A2) X SIMM sockets (J6J1, J7J1, J7J2, J7J3)
Y Intel SB82371SB (PIIX3, U6E1) Z Auxiliary fan header (1x3, J4A1) AA Keylock header (3x1, J3A1)
BB Front panel connector (J2A1) CC Processor socket (U3C1) DD Intel SB82441FX (PMC, U4F1)
EE Intel SB82442FX (DBX, U2F1) FF ISA/PCI riser socket (J6J2) GG Consumer/Fast IR header (5x2, J4L1)
HH PCI slot Jumper block (2x3, J1J1) II LPB VESA header (J1K1) JJ S3 ViRGE/DX video controller (U2K1)
KK 2 MB of Video DRAM LL Configuration jumper block (J4L2) MM COM2H header (5x2, J3N1)

O Standard 3.3V power connector (J9J1)

8

Motherboard Description

1.2 Motherboard Manufacturing Options

Contact your local Intel Field Sales Office for options and ordering information.

1.3 Form Factor

The motherboard is designed to fit into a standard LPX form factor chassis. Figure 2 illustrates the
mechanical form factor for the AP440FX. The AP440FX LPX form factor adheres to the standard
LPX guidelines with outer dimensions of 9 inches x 13 inches.

7.10

12.63

10.98

0.37

0.00

0.35

0.00

3.55

Figure 2. Motherboard Dimensions

7.15

8.45

5.50

0.150

8.65

OM06179

9

AP440FX Motherboard Technical Product Specification

1.4 I/O Shield

The back panel I/O shield for the AP440FX motherboard must meet specific dimensional and
material requirements. Computers based on the AP440FX motherboard need the back panel I/O
shield in order to pass certification testing. Figure 3 shows the critical dimensions for the I/O
shield and indicates the position of each cutout.

0.682

0.525

2.534

3.945

4.645

5.302

5.963

6.904

8.193

9.000

0.118

0.9000.235

Right-end View

Figure 3. Back Panel I/O Shield Dimensions

0.021

0.080

0.075

0.079

0.027

OM06183A

10

Motherboard Description

1.5 Microprocessor

The AP440FX motherboard operates with 2.1 V to 3.5 V Pentium Pro processors. An onboard
voltage regulator circuit provides the required voltages from the 5 V and 3.3 V taps off the power
supply. The onboard voltage regulator makes use of the VID capabilities to automatically adjust
its voltage output to match that of the installed processor. Pentium Pro processors running at 150,
166, 180, and 200 MHz are supported.

The Pentium Pro processor integrates the second level cache and cache controller that were
previously implemented on the motherboard. The internal, non-blocking L2 cache on the 150, 180
and 200 MHz processors is 256 KB, while second versions of the 166 and 200 MHz processors
integrate a 512 KB cache. The Pentium Pro processor has an advanced numeric coprocessor that
significantly increases the speed of floating point operations, while maintaining backward
compatibility with math coprocessors that comply with ANSI/IEEE standard 754-1985.

NOTE

✏

If you are installing a 3.5 V processor, a jumper must be installed on the jumper block located at
J8A2. See Section 1.13 for more information.

NOTE

✏

The 200 MHz Pentium Pro processor with 512 KB of cache memory is not supported on the
AP440FX motherboard.

1.5.1 Microprocessor Upgrade

Socket 8 is a 387-pin, modified staggered pin grid array (SPGA) zero insertion force (ZIF) socket,
along with a programmable voltage regulator for the microprocessor core. It provides users with a
performance upgrade path to OverDrive processors. The voltage regulator programming is
automatic and controlled by the VID pins of the processor.

1.5.2 Microprocessor Heatsink and Clips

An approved Pentium Pro processor heatsink is necessary for proper thermal dissipation in an LPX
compliant chassis. The processor/heatsink assembly must be securely fastened to the Socket 8 ZIF
socket by two clips. These clips fit over the heatsink assembly and attach to the outer wide tabs of
the Socket 8 assembly.

CAUTION

Do not use the older style of bail-wire clips for securing the heatsink assembly. These clips have
been found to damage the motherboard when installed or removed incorrectly.

11

AP440FX Motherboard Technical Product Specification

1.6 Main System Memory

The motherboard has four 72-pin tin-lead SIMM sockets that make it possible to install up to
128 MB of RAM. The sockets support 1M x 32 (4 MB) single-sided modules, 2M x 32 (8 MB),
4M x 32 (16 MB), and 8M x 32 (32 MB) single- or double-sided modules. Minimum memory size
is 8 MB and maximum memory size, using four 8M x 32 SIMM modules, is 128 MB. Memory
timing requires 60 ns fast page devices or, for optimum performance, 60 ns EDO DRAM. Both
parity and non-parity memory modules are supported. With parity SIMMs, the board can be
configured to support ECC operation.

The four sockets are arranged in two banks of two sockets each. The sockets are designated
Bank 0 and Bank 1. Each bank provides a 64/72-bit wide data path. Both SIMMs in a bank must
be of the same memory size and type, although the types and sizes of memory may differ between
banks. Bank 0 only, Bank 1 only, or both of the banks may be populated. There are no jumper
settings required for the memory size or type, which is automatically detected by the BIOS. Use
only tin lead SIMMs when adding DRAM.

1.6.1 DRAM

EDO (or Hyper Page) DRAM is designed to improve the DRAM read performance. EDO DRAM
holds the memory data valid until the next memory access cycle, unlike standard fast page mode
DRAM that tri-states the memory data when the precharge cycle occurs, prior to the next memory
access cycle.

1.6.2 Parity and ECC DRAM

Memory error checking and correction is supported by parity SIMMs. With parity SIMMs, the
board can be configured to support ECC memory operation. Parity SIMMs are automatically
detected, but the user must enter Setup to configure the SIMMs for either Parity or ECC operation.
Parity memory detects single bit errors. ECC memory detects double bit errors and corrects single
bit errors. Errors may be generated by a defective memory module, by different speeds of memory
modules, or by DMA or memory conflicts.

1.7 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 Xccelerator (PIIX3)
bridge, provides the connection between the ISA and PCI buses.

1.7.1 82441FX PCI Bridge and Memory Controller (PMC)

The 82441FX comes in a 208 pin QFP package and provides the following features:

• Microprocessor interface control
 Pentium Pro processor host bus up to 66 MHz
 32-bit addressing

12

Motherboard Description

• Integrated DRAM controller
 64/72-bit Non-Interleaved path to memory w/ ECC support
 Support for EDO and Fast Page DRAM
 8 MB to 256 MB main memory

• Fully synchronous PCI bus interface
 PCI Rev. 2.1 - 5 V interface compliant
 25/30/33 MHz
 PCI to DRAM > 100 MBps

• Data Buffering
 Host-to-DRAM and PCI-to-DRAM write data buffering
 Write combining support for host-to-PCI burst writes

1.7.2 82442FX Data Bus Accelerator (DBX)

The DBX connects to the 64 bit Pentium Pro processor data bus, the 64/72 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 computers. The DBX comes in
a 208 pin PQF package.

1.7.3 82371SB PCI/ISA IDE Xccelerator (PIIX3)

The 82371SB provides the interface between the PCI and ISA buses and integrates a dual channel
fast IDE interface capable of supporting up to four devices. The 82371SB integrates four 8-bit and
three 16-bit DMA channels, three 8-bit timer/counters, two eight-channel interrupt controllers,
PCI-to-AT
bus arbitration circuitry together into the same device. The PIIX3 comes in a 208-pin QFP
package and provides the following features:

• Interface between the PCI bus and ISA bus

• Universal Serial Bus (USB)

• Integrated fast IDE interface

• Enhanced DMA controller with Fast Type-F DMA

• Counters/Timers

• Power Management

†

interrupt mapping circuitry, NMI logic, ISA refresh address generation, and PCI/ISA

 Host/Hub Controller
 Support for 2 USB ports

 Support for up to 4 devices with separate Master/Slave mode support
 PIO Mode 4 transfers up to 16 MB/sec
 Integrated 8 x 32-bit buffer for Bus Master IDE PCI burst transfers

 Programmable system management interrupt (SMI)

13

AP440FX Motherboard Technical Product Specification

1.7.4 IDE Support

The motherboard provides two independent high performance bus-mastering PCI IDE interfaces
capable of supporting PIO Mode 3 and Mode 4 devices. The BIOS supports Logical Block
Addressing (LBA) and Extended Cylinder Sector Head (ECHS) translation modes as well as ATAPI
(e.g., CD-ROM) devices on both IDE interfaces. Detection of IDE device transfer rate and
translation mode capability is automatically determined by the BIOS.

Normally, programmed I/O operations require a substantial amount of microprocessor bandwidth.
In true multi-tasking operating systems like Windows
by using PCI 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 Windows 95 environment,
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.

†

95, the microprocessor bandwidth freed up

1.7.5 Secure Flash Support

The AP440FX motherboard uses both onboard hardware and BIOS code support to protect the
onboard flash memory device from accidentally or intentionally being corrupted. A general
purpose I/O (GPIO) port of the I/O controller is used to control the write enable line of the flash
device. By putting the microprocessor in System Management Mode (SMM) whenever the flash
write is enabled, the BIOS can ensure that the SMM code is not corrupted and that flash can only
be written from within SMM.

1.7.6 USB Support

The AP440FX motherboard has two USB ports. This permits connection of two USB peripheral
devices directly to the computer without an external hub. If more devices are required, an external
hub can be connected to either of the built-in ports. The motherboard completely supports the
standard universal host controller interface (UHCI) and takes advantage of the standard software
drivers written to be compatible with UHCI. Features of the USB include:

• 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 protocol

• Low cost cables and connectors

14

Motherboard Description

1.8 PC87307 Super I/O Controller

Control for the integrated serial ports, parallel port, floppy drive, real-time clock, and keyboard
controller is incorporated into a single component, the National Semiconductor PC87307. The
PC87307 is a fully Plug and Play compatible device which provides:

• Two NS16C550-compatible UARTs with send/receive 16 byte FIFO
 Support for an IrDA and Consumer IR compliant Infrared interface

• Multi-mode bi-directional 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 data FIFO (2.88 MB floppy support)

• Integrated Real Time Clock with Century calendar functionality

• Integrated 8042 compatible keyboard controller

The PC87307 is normally configured automatically by the BIOS, but configuration of these
interfaces also is possible using the CMOS Setup utility that can be invoked during boot. The
serial ports can be enabled as COM1, COM2, COM2 as IrDA, or disabled. The parallel port can
be configured as compatible, bi-directional, EPP/ECP, or disabled. The floppy interface can be
configured for 360 KB or 1.2 MB 5¼" media or for 720 KB, 1.2 MB, 1.44 MB, or 2.88 MB
3½" media.

and Centronics† compatible

1.8.1 Floppy Controller

The PC87307 is software compatible with the DP8473 and 82077 floppy disk controllers. The
floppy interface can be configured for 360 KB or 1.2 MB 5¼" media or for 720 KB, 1.2 MB,

1.44 MB, or 2.88 MB 3½" media in the BIOS setup. 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" (3-mode floppy) requires the use of a driver to operate correctly.

1.8.2 Keyboard and Mouse Interface

PS/2 keyboard/mouse connectors are located on the back panel side of the motherboard. The 5V
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, care should be taken to turn off the
power before installing or removing a keyboard or mouse.

The integrated 8042 microcontroller contains the AMI Megakey keyboard/mouse controller code
which, besides providing traditional keyboard and mouse control functions, supports Power­On/Reset (POR) password protection. The POR password can be defined by the user in the Setup
program. 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 computer by jumping to the beginning of the BIOS code and running the POST operation.

†

circuit which acts much like a self-

15

AP440FX Motherboard Technical Product Specification

• <CTRL> <ALT> <defined in Setup>: Power down and coffee-break key sequences take
advantage of the SMM features of the Pentium Pro processor to greatly reduce the computer’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 user
specified password is given.

1.8.3 Real-Time Clock, CMOS RAM and Battery

The integrated real-time clock 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. The
real-time clock can be set in the Setup program. The real-time clock also supports 242-byte
battery-backed CMOS RAM in two banks which is reserved for BIOS use. The CMOS RAM can
be set to specific values or cleared to the default values using the Setup program. Also, the CMOS
RAM values can be cleared to the defaults by using a configuration jumper on the motherboard.

An external coin-cell style battery provides power to the real-time clock and CMOS memory. The
battery used is a long-life version that is socketed for easy replacement. When the computer is on,
the life of the battery is extended by a trickle current from the power supply.

1.8.4 Infrared Support

A 5-pin interface on the front panel I/O connector allows connection to a Hewlett Packard† HSDL­1000 compatible infrared (IrDA) transmitter/receiver. Once the module is connected to the front
panel I/O header, Serial port 2 can be redirected to the IrDA module. When configured for IrDA,
the user can transfer files to or from portable devices such as laptops, PDAs and printers using
application software such as LapLink
115kbps from a distance of 1 meter. Support for Consumer Infrared (ASK-IR and DASK-IR
options for SHARP-IR) is also included. Consumer infrared is supported at both slow and medium
speeds.

1.8.5 Parallel Port

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

1.9 Graphics Subsystem

The AP440FX motherboard is available with a factory option of an S3 ViRGE† or ViRGE/DX
SVGA graphics controller. Both options are supported by 2 MB of 50 ns EDO SOJ DRAM
soldered to the motherboard. The AP440FX motherboard also supports the S3 media channel, also
known as the Local Peripheral Bus (LBP) or Scenic Highway.

†

. The IrDA specification provides for data transfers at

16

Motherboard Description

1.9.1 S3 ViRGE Graphics Subsystem

The AP440FX motherboard is available with a factory option of an S3 ViRGE SVGA graphics
controller with 2 MB of 50 ns EDO SOJ DRAM. The S3 ViRGE has a high performance 64-bit
2D/3D graphics engine and incorporates the S3 Streams Processor that enables the device to
convert YUV formatted video data to RGB and provides acceleration for scaling the video display
without compromising picture quality or frame rate. The on-chip RAMDAC/clock synthesizer is
capable of output pixel data rates of 135 MHz providing non-interlaced screen resolutions of up to
1280x1024x256 colors at 75 Hz. The 64-bit S3d Engine incorporates the key Windows and other
GUI accelerator functions of BitBLT, line draw and polygon fill. 3D features include flat shading,
Gouraud shading and texture mapping support. Advanced texture mapping features include
perspective correction, bi-linear and tri-linear filtering, MIP-mapping, and Z-buffering. These
features provide the most realistic user experience for interactive 3D applications. In addition, a
fast linear addressing scheme based upon DCI reduces software overhead by mapping the display
memory into the microprocessor’s upper memory address space and permitting direct
microprocessor access to the display memory.

Table 2. S3 ViRGE Supported Resolutions

Resolution Refresh rate (Hz)

640 x 480 x 16 colors 60
640 x 480 x 256 colors 60, 72, 75, 85
640 x 480 x 65,536 colors 60, 72, 75
640 x 480 x 16,777,216 colors (non-accelerated mode) 60, 72, 75
800 x 600 x 256 56, 60, 72, 75, 85
800 x 600 x 65,536 60, 72, 75
800 x 600 x 16,777,216 colors (non-accelerated mode) 60, 72, 75
1024 x 768 x 256 43(IL), 60, 70, 75, 85
1024 x 768 x 65,536 43(IL), 60, 70, 75
1280 x 1024 x 256 45(IL), 60, 72, 75

NOTE: IL = Interlaced

The S3 ViRGE graphics controller supports more modes than shown above. The graphics drivers provide options for
additional resolutions.

17

AP440FX Motherboard Technical Product Specification

1.9.2 S3 ViRGE/DX Graphics Subsystem

The optional onboard graphics subsystem uses the S3 ViRGE/DX graphics controller, with the
following features:

• 64-bit graphics engine with accelerator core

• 24-bit RAMDAC/clock synthesizer

• Dual programmable clock generators

• DCI-based linear addressing scheme

• S3 Streams Processor, which enables the conversion of video data from YUV format to RGB

format and accelerates display scaling while maintaining picture quality and frame rate

• 3-D graphics support including flat shading, Gouraud shading, and advanced texture mapping

• S3 Scenic Highway support for hardware MPEG

Table 3. S3 ViRGE/DX Supported Resolutions

Refresh Rate (Hz) At:

4-bit Color

Resolution

640 x 480 60 60, 72, 75, 85 60, 72, 75 60, 72, 75 * 60, 72, 75
800 x 600 not supported 56, 60, 72, 75,8560, 72, 75 60, 72, 75 * 60, 72, 75

(16 Colors)

8-bit Color
(256 Colors)

15/16-bit Color
(32K/64K Colors)

24-bit Color
(16M Colors)

32-bit Color
(16M Colors)

1024 x 768 not supported 43(IL), 60 ,70,

75, 85

1280 x 1024 43(IL), 45(IL),

60, 72, 75 *

1600 x 1200 not supported 48.5(IL) not supported not supported not supported

* Non-accelerated mode only
IL = Interlaced

The S3 ViRGE/DX graphics controller supports more modes than shown above. The graphics drivers provide options for
additional resolutions.

45(IL), 60, 72, 75 not supported not supported not supported

43(IL), 60, 70, 75 not supported not supported

1.9.3 LBP VESA Feature Connector

The AP440FX motherboard supports a 34-pin VESA feature connector (which also accepts a
26-pin peripheral plug) for synchronizing graphics output with an external NTSC or PAL signal
and a shared frame buffer interface to maximize multimedia performance, as well as the LPB or
Scenic Highway that provides a glueless bi-directional interface to a video companion device such
as an MPEG/live video decoder. The AP440FX also supports other VESA standards such as the
VESA DPMS protocol to put a DPMS compliant monitor into power saving modes and the VESA
Display Data Channel (DDC2B) that permits transfer of monitor identification and resolution
support data for ease of use.

1.9.4 Graphics Drivers and Utilities

Graphics drivers and utilities may be downloaded from the Intel Applications Support web site at
http://www-cs.intel.com/oem_developer/motherbd. Once the site is accessed, perform a keyword

†

search for the specific application and its driver. Drivers for SCO

18

UNIX† are available from SCO.

Motherboard Description

1.10 Audio Subsystem

The AP440FX motherboard features a 16-bit stereo audio subsystem as a factory installed option.
The audio subsystem is based on the Crystal CS4236 multimedia codec. The CS4236 provides all
the digital audio and analog mixing functions required for playing and recording of audio on
personal computers. These functions include:

• 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 / µlaw

• Full digital control of all mixer and volume control functions

The CS4236 also provides support for four major sound standards including AdLib
Blaster Pro 2.0, Windows Sound System, and MPU-401. The CS4236 also supports full-duplex
operation which ensures support for applications such as video conferencing.

The CS4236 includes a Plug and Play compatible ISA interface and is comprised of seven logical
devices including:

• Synthesizer

• Game Port

• Sound Blaster

• Sound System

• MPU-401

• CD-ROM

• CS4236 device

†

, Sound

Each logical device is configured into the host environment using the ISA Plug and Play
configuration methodologies. The audio subsystem requires up to two DMA channels and one
interrupt. The computer can be configured to use either DMA channels 0, 1, or 3. The interrupt
can be mapped to use interrupt 5, 7, 9, 11, 12, or 15.

1.11 Management Extension Hardware

The Management Extension hardware provides low-cost instrumentation capabilities designed to
reduce the total cost of PC ownership. The Management Extension hardware incorporates features
that support the requirements of the Desktop Management Interface (DMI) compliant areas of the
BIOS, as well as those of the LANDesk
is a single-chip ASIC with the following features:

• An integrated temperature sensor plus support for an external temperature sensor

• Support for one fan speed sensor

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

• Registers for storing POST hardware test results and error codes

• 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†.



Client Manager software. The hardware implementation

19

AP440FX Motherboard Technical Product Specification

When an out-of-range condition (temperature, fan speed, or voltage) is reached, an interrupt is
activated. The Management Extension circuitry connects to the ISA bus as an 8-bit I/O mapped
device and uses the I/O addresses identified in the I/O map.

1.12 Motherboard Connectors

The AP440FX motherboard has onboard connectors supporting the following feature areas:

• Front panel features

• Memory (SIMM) and expansion (PCI/ISA riser) sockets

• Video features

• Serial header

• Audio features

• Power connectors

• Floppy and PCI IDE connectors

Figure 4 identifies the connectors on the AP440FX motherboard, and indicates the feature area
with which each connector is associated.

20

Motherboard Description

Bank 0(J6J1, J7J1)
Bank 1(J7J2, J7J3)

PCI/ISA Riser
Connector(J6J2)

OM06182

Audio

1

J9N1

CD-ROM

4

Power

1

J9J1

3.3V
Power

6

1

J9H1

Primary
Power

12

Video

34

2

33

1

LPB

VESA

J1K1

28

Floppy/IDE

Primary

Secondary

Front Panel

1 27

J2A1

Front Panel I/O Connector Header

1

J3A1

Keylock

1

J9F1

Soft
Off

3

12

J9L1

Wavetable

7

8

1

33

2

34

5

J8L1

Floppy
Drive

40

2

39

1

PCI IDE

J8H1
J9H2

J9K1

Telephony

1

12

J3N1

COM2H

9

8

Serial

1

J4A1

Aux.
Fan

3

Figure 4. Motherboard Connector Locations

21

AP440FX Motherboard Technical Product Specification

OM04953

1 27

SPKR

SLP

IRDA

SW_ON PWRLED

RESETHDLED

613183

J2A1

1

J3A1

Keyboard

Lock

1.12.1 Front Panel Connectors

The AP440FX motherboard provides connectors to support functions typically located on the
chassis bezel. In addition, connectors are provided that support a cooling fan and a keyboard lock.
Front panel features supported by front panel connectors include:

• Soft Power-On

• Sleep/Resume

• Infrared (IrDA) port

• Hard Drive activity LED

• Power LED

• Reset

• Speaker

• Keyboard lock

Each of the front panel connectors is identified in Figure 4. The front panel I/O connector and
keyboard lock connector are shown, in detail, in Figure 5.

Figure 5. Front Panel I/O Connectors

Table 4 lists the pinout for the front panel I/O connector.

Table 4. Front Panel I/O Connector (J2A1)

Pin Signal Name Pin Signal Name

1 SW_ON 15 HD ACTIVE
2 FPPWR_ON 16 +5V
3 SLEEP_REQ 17 Key
4 FPSLP 18 Ground
5 Key 19 Key
6 +5V 20 PWRDVR
7 Key 21 Key
8 IR_RX 22 Ground
9 Ground 23 FP_RESET
10 IR_TX 24 +5V
11 IR_SL1 25 Key
12 Key 26 SPKR_DAT connect
13 +5V 27 PC_SPKROUT
14 Key

22

Motherboard Description

1.12.1.1 SW_ON

This 2-pin header connects to a front panel power switch. When the switch is closed, the power
supply turns on. If a mechanical switch is connected to this header, it must apply a momentary
ground to the SW_ON header pin in order to signal the supply to turn on or off. Because of the
motherboard’s internal debounce circuitry, the ground must be applied for at least 50ms. At least
two seconds must pass before the power supply will recognize another on/off signal (to prevent
“double clicking”).

1.12.1.2 Sleep/Resume

When Advanced Power Management (APM) is activated in the BIOS and the Operating System’s
APM driver is loaded, Sleep mode (Standby) can be entered in one of three ways:

• An optional front panel “Sleep/Resume” button

• A user defined keyboard hot key

• Prolonged computer inactivity

The Sleep/Resume button is supported by a 2-pin header located on the front panel I/O connector.
Closing the “Sleep” switch generates an SMI (System Management Interrupt) to the processor
which immediately goes into System Management Mode (SMM).

The front panel “Sleep mode” switch must be a momentary two pin SPST type that is normally
open. The function of the Sleep/Resume button can also be achieved by using a keyboard hot-key
sequence, or by a time-out of the inactivity timer. Both the keyboard hot key and the inactivity
timer are programmable in the BIOS Setup (timer is set to 10 minutes by default). To reactivate
the computer, or “Resume”, the user must simply press the sleep/resume button again, or use the
keyboard or PS/2 mouse. Mouse activity only “wakes up” the computer if a mouse driver is
loaded. While the computer is in Standby or “sleep” mode, it is fully capable of responding to and
servicing external interrupts (such as in-coming FAX) even though the monitor only turns on if a
user interrupt (keyboard/mouse) occurs as mentioned above.

1.12.1.3 Infrared Connector

Serial port 2 can be configured to support an IrDA module with a 5 pin header connector. Once
configured for IrDA, the user can transfer files to or from portable devices such as laptops, PDAs
and printers using application software such as LapLink. The IrDA specification provides for data
transfers at 115 Kbps from a distance of 1 meter. Consumer IR is also supported by the same
connector.

1.12.1.4 Hard Drive LED

This 3-pin, keyed header can be connected to a front panel LED to indicate when hard drive
activity is taking place. When the hard drive is being accessed, the HDACTIVE pin (J2A1-15)
goes low.

1.12.1.5 Power-ON LED

This 2-pin header can be connected to a front panel LED to indicate when power is applied to the
motherboard. When the motherboard is powered up, power is applied to the PWRDRV pin
(J2A1-20) to light the front panel LED.

23