Intel AP440FX manual

AP440FX Motherboard Technical Product Specification 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. May, 1997 Order Number 281830-002[...]

Revision History Revision Revision History Date -001 Release of the AP440FX Technical Product Specification. 7/96 -002 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 AP[...]

iii T able of Contents 1 Motherboard Description 1.1 Overview ...................................................................................................................... 7 1.2 Motherboard Manufacturing Options ........................................................................... 9 1.3 Form Factor ...................................[...]

AP440FX Motherboard Technical Product Specification iv 1.15 Environmental ................................................................ ............................................ 38 1.16 Power Consumption .................................................................................................. 38 1.16.1 Power Supply Considerations ...[...]

Contents v 4 Error Messages and Beep Codes 4.1 BIOS Beep Codes ..................................................................................................... 7 1 4.2 PCI Configuration Error Messages ............................................................................ 71 4.3 BIOS Error Messages ........................................[...]

AP440FX Motherboard Technical Product Specification vi 32. Interrupts ................................................................................................................... 44 33. Flash Memory Organization ....................................................................................... 4 5 34. Recommendations for Configuring an [...]

7 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[...]

AP440FX Motherboard Technical Product Specification 8 OM06178 L O Q R P AA S J K Z Y X W T U V M N AB G DE H I F C FF HH JJ GG CC BB DD II EE KK LL MM 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 ?[...]

Motherboard Description 9 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 stan[...]

AP440FX Motherboard Technical Product Specification 10 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 shi[...]

Motherboard Description 11 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[...]

AP440FX Motherboard Technical Product Specification 12 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 i[...]

Motherboard Description 13 • 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-D[...]

AP440FX Motherboard Technical Product Specification 14 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., C[...]

Motherboard Description 15 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 UAR[...]

AP440FX Motherboard Technical Product Specification 16 • <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. ?[...]

Motherboard Description 17 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 v[...]

AP440FX Motherboard Technical Product Specification 18 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 ad[...]

Motherboard Description 19 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. [...]

AP440FX Motherboard Technical Product Specification 20 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 mothe[...]

Motherboard Description 21 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 1 2 J9L1 Wavetable 7 8[...]

AP440FX Motherboard Technical Product Specification 22 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 [...]

Motherboard Description 23 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 intern[...]

AP440FX Motherboard Technical Product Specification 24 1.12.1.6 Reset This 2-pin header can be connected to a momentary SPST type switch that is normally open. When the switch is closed, the computer performs a hard reset and runs POST. 1.12.1.7 Speaker The speaker provides error beep code information during the POST, if the computer cannot use the[...]

Motherboard Description 25 1.12.2 Memory/Expansion Connectors The AP440FX motherboard has four 72-pin SIMM sockets for main memory. These sockets accept standard SIMM 72-pin modules, as long as they satisfy the requirements described in the “Main System Memory” section of this specification, starting on page 12. The AP440FX motherboard uses a P[...]

AP440FX Motherboard Technical Product Specification 26 Table 7. PCI/ISA Riser Connector (J6J2) (continued) Pin Signal Name Pin Signal Name Pin Signal Pin Signal Name A19 SA12 B19 REFRESH# E19 AD26 F19 AD25 A20 SA11 B20 SYSCLK E20 AD24 F20 CBE3# A21 SA10 B21 IRQ7 E 21 AD22 F21 AD23 A22 S A9 B22 IRQ6 E 22 AD20 F22 AD21 A23 S A8 B23 IRQ5 E 23 AD18 F23[...]

Motherboard Description 27 1.12.3 VESA Feature Connector Table 8 provides the pinout and signal listing for the LBP VESA feature connector. Table 8. LBP VESA Feature Connector (J1K1) Pin Signal Name / Function Pin Signal Name / Function 1 Ground 2 Pixel Data 0 3 Ground 4 Pixel Data 1 5 Ground 6 Pixel Data 2 7 Enable External Pixel Data 8 Pixel Data[...]

AP440FX Motherboard Technical Product Specification 28 1.12.5 Audio Connectors The pinouts and signal listings for the audio connectors are provided in Table 10, Table 11, and Table 12. Table 10. CD-ROM Connector (J9N1) Pin Signal Name 1 Ground 2 CD-Left 3 Ground 4 CD-Right Table 11. Wavetable Upgrade Connector (J9L1) Pin Signal Name 1 Wave Right 2[...]

Motherboard Description 29 1.12.6 Power Supply Connectors The AP440FX motherboard must be used with a power supply that supports remote power on/off, so the motherboard can turn off the power under software control. The Powerman utility supplied for Windows 3.1x allows for soft-off as does the shutdown icon in Windows 95 Start menu. The BIOS turns [...]

AP440FX Motherboard Technical Product Specification 30 The pinout listing for the soft-off power supply connector of the AP440FX motherboard is shown in Table 15. This 3-pin, keyed position supports a software-controlled power supply shutoff (soft- off). When connected to this position, the power supply follows remote on/off commands. Table 15. Sof[...]

Motherboard Description 31 Table 17 lists the pinout and signal names for the IDE connectors. Table 17. IDE Connectors (J8H1, J9H2) 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 H[...]

AP440FX Motherboard Technical Product Specification 32 1.12.8 Back Panel Connectors Figure 7 shows the location of the back panel connectors. OM06183 PS/2 Keyboard VGA Video Mic Input Parallel Port PS/2 Mouse USB 1 Serial Port 1 Audio Out USB 2 Figure 7. I/O Connections 1.12.8.1 VGA Video Connector Table 18 lists the pinout and signal names for [...]

Motherboard Description 33 1.12.8.2 COM1 Serial Port Table 19 lists the pinout and signal names for the serial connectors. Table 19. Serial Port Connector Pinout Pin Signal Name Description 1 D CD Carrier Detect 2 SIN# Serial Data In 3 SOUT# Serial Data Out 4 DTR# Data Terminal Ready 5 GND Chassis Ground 6 DSR# Data Set Ready 7 RTS# Request To Send[...]

AP440FX Motherboard Technical Product Specification 34 1.12.8.5 Parallel Port Table 22 lists the pinout and signal names for the parallel port connector. Table 22. Parallel Port Connector Pinout Pin Signal Name Description Pin Signal Name Description 1 STB# Strobe 14 AFD# Auto Feed 2 PPD0 Data Bit 0 15 ERROR# Fault 3 PPD1 Data Bit 1 16 INIT# Initia[...]

Motherboard Description 35 1.13 Jumper Settings There are three jumper blocks on the AP440FX motherboard. The jumper block at J1J1 defines the number of PCI slots (two or three slots) available on the riser board used with the motherboard. The jumper block at J4L2 defines a range of microprocessor and motherboard configuration parameters. The jumpe[...]

AP440FX Motherboard Technical Product Specification 36 1.13.1 Microprocessor Configuration (J4L2) These allow the motherboard to be switched between different speeds of the Pentium Pro processor. These jumpers also affect the PCI and ISA clock speeds as shown in Table 23. Table 23. Microprocessor/System Speed Settings J4L2-A J4L2-B J4L2-C Microproc[...]

Motherboard Description 37 Table 24 lists the motherboard configuration jumper positions and indicates the meaning for each position. Table 24. Configuration Jumper Settings Function Jumper Configuration FDWPR - Flash Write Protect J4L2-D, 5-6 J4L2-D, 4-5 UP - NOR ( Default ), Normal operation DOWN - PRT, Protect FLASH - Flash Recover J4L2-E, 2-3 J[...]

AP440FX Motherboard Technical Product Specification 38 1.15 Environmental Table 25. Motherboard Environmental Specifications Parameter Specification Temperature Non-Operating -40 o C to +70 o C Operating +0 o C to +55 o C DC Voltage +3.3 V ±5 % +5 V ±5 % -5 V ±5 % +12 V ±5 % -12 V ±5 % Vibration Unpackaged 5 Hz to 20 Hz : 0.01g² Hz sloping up[...]

Motherboard Description 39 1.16.1 Power Supply Considerations The AP440FX motherboard is designed to operate with a switching power supply in the PS/2 form-factor with dual line input capability, remote ON/OFF, forced air cooling, standby voltage (VSB), and the following electrical characteristics: • Power - 200 W maximum peak, 160 W maximum cont[...]

AP440FX Motherboard Technical Product Specification 40 1.17.1.5 EMKO-TSE (74-SEC) 207/94 Summary of Nordic deviations to EN 60 950. (Norway, Sweden, Denmark & Finland) 1.17.2 EMI 1.17.2.1 FCC Class B Title 47 of the Code of Federal Regulations, Parts 2 & 15, Subpart B, pertaining to unintentional radiators. (USA) 1.17.2.2 CISPR 22, 2nd Edit[...]

41 2 Motherboard Resources 2.1 Memory Map Table 28. Memory Map Address Range (Decimal) Address Range (hex) Size Description 1024K-131072K 100000-8000000 127M Extended Memory 960K-1023K F0000-FFFFF 64K AMI BIOS 944K-959K EC000-EFFFF 16K Boot Block 936K-943K EA000-EBFFF 8K ESCD (Plug and Play configuration area) 932K-935K E9000-E9FFF 4K Reserved for [...]

AP440FX Motherboard Technical Product Specification 42 2.2 I/O Map Table 29. I/O Map Address (hex) Size Description Address (hex) Size Description 0000 - 000F 16 bytes PIIX3 - DMA 1 0376 1 byte Sec IDE Chan Cmd Port 0020 - 0021 2 bytes PIIX3 - Interrupt Controller 1 0377 1 byte Sec IDE Chan Stat Port 002E - 002F 2 bytes 87307 Base Configuration 037[...]

Motherboard Resources 43 2.3 Soft-Off Control The motherboard design uses Soft-off control implemented under the SMM code in the BIOS. Any power supply used with the AP440FX motherboard must support the Soft-off feature. The ONCTL# pin of the I/O controller is connected to the Soft-off control line in the power supply circuit. The registers in the [...]

AP440FX Motherboard Technical Product Specification 44 2.6 Interrupts Table 32. Interrupts IRQ Resource NMI I/O Channel Check 0 Reserved, Interval Timer 1 Reserved, Keyboard buffer full 2 Reserved, Cascade interrupt from slave PIC 3 Serial Port 2 4 Serial Port 1 5 Audio - Codec 6 Floppy 7 Parallel Port 1 8 Real Time Clock 9 Audio - FM Synthesis 10 [...]

45 3 Motherboard BIOS and Setup Utility 3.1 Introduction The AP440FX motherboard uses an Intel BIOS, which is stored in flash memory and easily upgraded using a floppy disk-based program. In addition to the Intel BIOS, the flash memory also contains the Setup utility, Power-On Self Tests (POST), APM 1.2, the PCI auto-configuration utility, and Wind[...]

AP440FX Motherboard Technical Product Specification 46 The disk-based Flash upgrade utility, FMUP.EXE, has three options for BIOS upgrades: • The Flash BIOS can be updated from a file on a disk. • The current BIOS code can be copied from the Flash EEPROM to a disk file as a backup in the event that an upgrade cannot be successfully completed. ?[...]

Motherboard BIOS and Setup Utility 47 PCI specification 2.1 for add-in card auto-configuration is also a part of the Plug and Play BIOS. Peer-to-peer hierarchical PCI Bridge 1.0 is supported, and by using an OEM supplied option ROM or TSR, a PCI-to-PCMCIA bridge capability is possible as well. 3.6 ISA Plug and Play The BIOS incorporates ISA Plug an[...]

AP440FX Motherboard Technical Product Specification 48 3.8 Advanced Power Management (APM) This section describes the use of System Management Mode (SMM) by the BIOS. The BIOS supports APM version 1.2. APM is enabled in BIOS by default; however, the computer must be configured with an APM driver to utilize the system power saving features. Windows [...]

Motherboard BIOS and Setup Utility 49 3.10 Language Support The BIOS setup screen and help messages are supported in 32 languages. There are 5 languages available at this time: American English, German, Italian, French, and Spanish. Translation to other languages may become available at a later date. 3.11 Boot Options Booting from CD-ROM is support[...]

AP440FX Motherboard Technical Product Specification 50 Table 35. Overview of the Setup Menu Screens Setup Menu Screen Description Main Set up and modify some of the basic options of a PC, such as time, date, diskette drives, hard drives. Advanced Modify the more advanced features of a PC, such as peripheral configuration and advanced chipset config[...]

Motherboard BIOS and Setup Utility 51 3.14.1.5 Primary IDE Slave Reports if an IDE device is connected to the computer. When selected, this brings up the IDE Device Configuration subscreen. 3.14.1.6 Secondary IDE Master Reports if an IDE device is connected to the computer. When selected, this brings up the IDE Device Configuration subscreen. 3.14.[...]

AP440FX Motherboard Technical Product Specification 52 3.14.2.3 Floppy A: Type Specifies the physical size and capacity of the floppy drive. The options are: • Disabled • 360 KB, 5.25-inch • 1.2 MB, 5.25-inch • 720 KB, 3.5-inch • 1.44/1.25 MB, 3.5-inch (default) • 2.88 MB, 3.5-inch. 3.14.2.4 Floppy B: Type Specifies the physical size an[...]

Motherboard BIOS and Setup Utility 53 3.14.3.3 Heads If IDE Device Configuration is set to User Definable, you must type the correct number of heads for your IDE device. If IDE Device Configuration is set to Auto Configured, this reports the number of heads for your IDE device and cannot be modified. 3.14.3.4 Sectors If IDE Device Configuration is [...]

AP440FX Motherboard Technical Product Specification 54 3.14.4 Boot Options Subscreen This section describes the options available on the Boot Options subscreen. 3.14.4.1 First Boot Device Sets which drive the computer checks first to find a bootable operating system. The options are: • Disabled • Floppy ( default ) • Hard Disk • CD-ROM • [...]

Motherboard BIOS and Setup Utility 55 3.14.4.7 Num Lock Sets the state of the Num Lock feature on your keyboard when you boot. The options are: • • Off (default) • On 3.14.4.8 Setup Prompt Turns on (or off) the “Press <F1> Key if you want to run Setup” prompt during the power-up sequence. The options are: • Disabled • Enabled (d[...]

AP440FX Motherboard Technical Product Specification 56 3.14.4.11 Typematic Rate Delay Sets how long it takes (in milliseconds) for the key-repeat function to start when you hold down a key on the keyboard. The options are: • 250 msec (default) • 500 msec • 750 msec • 1000 msec If Typematic Rate Programming is set to Default, this option is [...]

Motherboard BIOS and Setup Utility 57 3.14.5.2 Processor Speed Reports the microprocessor clock speed. There are no options. 3.14.5.3 Cache Size Reports the size of the secondary cache. There are no options. If your computer contains no L2 cache, this item does not appear. 3.14.5.4 Peripheral Configuration When selected, this brings up the Peripher[...]

AP440FX Motherboard Technical Product Specification 58 3.14.7.4 Serial Port 1 Interface Configures serial port 1. The options are described and listed in Table 36. The default option is Auto Configured. If the Configuration Mode is set to Auto Configured, the Setup program assigns the first free COM port (normally COM1, 3F8h) to serial port 1. Tabl[...]

Motherboard BIOS and Setup Utility 59 3.14.7.7 Parallel Port Interface Selects the address and IRQ of the parallel port. The options are described and listed in Table 37. If the Configuration Mode is set to Auto Configured, the Setup program assigns LPT1, 378h, IRQ7 to the parallel port. Table 37. Parallel Port Configuration Options Option Descript[...]

AP440FX Motherboard Technical Product Specification 60 Table 38 lists and describes the options that are available if the parallel port mode is ECP. Table 38. ECP - Compatible Configuration Options Option Description Disable Port not enabled LPT1, 378, IRQ7, DMA3 Enabled as LPT1 at indicated I/O address, IRQ, and DMA channel. LPT2, 278, IRQ7, DMA3 [...]

Motherboard BIOS and Setup Utility 61 3.14.7.13 Secondary PCI IDE Status Displays the current status of the Secondary PCI IDE Interface from the selectable setting above. This is an informational field and is not accessible. 3.14.7.14 Floppy Status Reports the current status of the floppy drive from the selectable setting above. There are no option[...]

AP440FX Motherboard Technical Product Specification 62 3.14.8.4 Onboard Video IRQ Enables or disables the onboard video IRQ. The options are: • Disabled (default) • Enabled 3.14.8.5 Video Palette Snoop Controls the ability of a primary PCI graphics controller to share a common palette with an ISA add-in video card. Some add-in cards that use th[...]

Motherboard BIOS and Setup Utility 63 3.14.8.8 Memory Error Detection Sets the type of error detection or correction. The options are: • Disabled (default) • ECC • Parity This field appears if either ECC or Parity SIMMs are detected. Parity and ECC SIMMs can be configured to run either as Parity or ECC (e.g. Parity SIMMs may be configured to [...]

AP440FX Motherboard Technical Product Specification 64 3.14.9.4 Inactivity Timer (Minutes) Sets how long the computer must be inactive before it enters power managed mode. Enter the number of minutes. The range is 0 to 255 minutes. The default is 10 minutes. This field does not appear if APM is disabled. 3.14.9.5 Hot Key (CTRL - ALT-) Sets the hot [...]

Motherboard BIOS and Setup Utility 65 3.14.10.3 ISA Shared Memory Size Sets a range of memory addresses that will be directed to the ISA bus rather than on-board memory. The options are: • • Disabled (default) • 16 KB • 32 KB • 48 KB • 64 KB • 80 KB • 96 KB If this is set to Disabled, the ISA Shared Memory Base Address (described be[...]

AP440FX Motherboard Technical Product Specification 66 3.14.10.5 IRQ 3, 4, 5, 7, 9, 10, 11, 12, 14, 15 Sets the status of the IRQ. The options are: • Available (default) • Used By ISA Card The PCI auto-configuration code looks here to see if these interrupts are available for use by a PCI or Plug and Play device. If an interrupt is available, t[...]

Motherboard BIOS and Setup Utility 67 3.14.11.5 Clear Event Log Sets a flag that clears the event log on the next pass through the POST. The options are: • Keep (default) • On Next Boot 3.14.11.6 Mark Existing Events as Read Marks all events already in the log as having been not read (Do Not Mark) or read (Mark). The options are: • Do Not Mar[...]

AP440FX Motherboard Technical Product Specification 68 3.14.12 Security Screen This section describes the two access modes that can be set using the options found on the Security screen, and then describes the Security screen options themselves. 3.14.12.1 Administrative and User Access Modes The options on the Security screen menu enable you to res[...]

Motherboard BIOS and Setup Utility 69 3.14.13.4 Set Administrative Password Sets the Administrative password. The password can be up to seven alphanumeric characters. 3.14.14 Exit Screen This section describes the different ways to exit and save or not save changes made in the Setup program. 3.14.14.1 Exit Saving Changes Saves the changes to CMOS R[...]

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71 4 Error Messages and Beep Codes 4.1 BIOS Beep Codes Table 41. BIOS Beep Codes Beeps Error Message Description 1 Refresh Failure The memory refresh circuitry on the motherboard is faulty. 2 Parity Error A parity error has been detected. 3 Base 64 KB Memory Failure Memory failure in the first 64 KB. 4 Timer Not Operational Memory failure in the fi[...]

AP440FX Motherboard Technical Product Specification 72 Table42. PCI Configuration Error Messages (continued) Error Message Explanation NVRAM Cleared By Jumper The “Clear CMOS” jumper has been moved to the “CLR” position and CMOS RAM has been cleared. NVRAM Data Invalid, NVRAM Cleared Invalid entry in the ESCD. Static Device Resource Conflic[...]

Error Messages and Beep Codes 73 4.3 BIOS Error Messages Table 44. BIOS Error Messages Error Message Explanation Gate A20 Error Gate A20 on the keyboard controller is not working. Address Line Short! Error in the address decoding circuitry on the motherboard. Cache Memory Bad, Do Not Enable Cache! Cache memory is defective. Replace it. CH-2 Timer E[...]

AP440FX Motherboard Technical Product Specification 74 4.4 ISA NMI Messages Table 45. ISA NMI Messages ISA NMI Message Explanation Memory Parity Error at xxxxx Memory failed. If the memory location can be determined, it is displayed as xxxxx. If not, the message is Memory Parity Error ????. I/O Card Parity Error at xxxxx An expansion card failed. I[...]