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AMI MB941 User Manual

Lga775 core 2 duo intel g41 chipset micro-atx motherboard
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MB941
LGA775 Core 2 Duo
Intel
G41 Chipset
®
Micro-ATX Motherboard
USER'S MANUAL
Version 1.0

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Summary of Contents for AMI MB941

  • Page 1 MB941 LGA775 Core 2 Duo Intel G41 Chipset ® Micro-ATX Motherboard USER’S MANUAL Version 1.0...
  • Page 2 Acknowledgments AMI is a registered trademark of American Megatrends, Inc. PS/2 is a trademark of International Business Machines Corporation. Intel is a trademark or registered trademark of Intel Corporation. Microsoft Windows is a registered trademark of Microsoft Corporation. Winbond is a registered trademark of Winbond Electronics Corporation.

  • Page 3: Table Of Contents

    Installations ............5 Installing the CPU .............. 6 ATX Power Installation ............6 Installing the Memory............7 Setting the Jumpers............. 8 Connectors on MB941 ............. 11 BIOS Setup ............22 Drivers Installation ........44 Intel Chipset Software Installation Utility ......45 Intel G41 Chipset Family Graphics Driver Installation ..48 Realtek High Definition Audio Driver Installation ...
  • Page 4 This page is intentionally left blank. MB941 User’s Manual...

  • Page 5: Introduction

    INTRODUCTION Introduction Checklist Your MB941 Core 2 Duo motherboard package should include the items listed below:  The MB941 motherboard  This User’s manual  1x SATA cable (SATA-5)  1x COM port cable (PK1-56)  1x USB cable (USB2-9) ...

  • Page 6: Product Description

    INSTALLATIONS Product Description The MB941 Micro-ATX motherboard is designed for either the Intel Core2 Duo or Core2 Quad processors of up to 1333MHz FSB. It is based on the Intel G41 Express chipset and it comes with two dual-channel DDR3 memory slots and 8GB memory capacity for faster system responsiveness and support of 64-bit computing.

  • Page 7: Specifications

    CPU Type processors 800/1066/1333MHz FSB (45nm/65nm Technology) Green /APM APM1.2 BIOS AMI BIOS, support ACPI Function Chipset Intel® G41 (82G41) Express GMCH: 1254 FCBGA (25W) Intel® ICH7 (82801GB): 652 BGA (3.3W) Memory Slot 240 DIMM x 2 (w/o ECC), for DDR3-1066 / DDR3-800 MHz Max. 4GB, dual channel Intel®...

  • Page 8: Board Dimensions

    INSTALLATIONS Board Dimensions MB941 User’s Manual...

  • Page 9: Installations

    INSTALLATIONS Installations This section provides information on how to use the jumpers and connectors on the MB941 in order to set up a workable system. The topics covered are: Installing the CPU ................6 ATX Power Installation ............... 6 Installing the Memory ................7 Setting the Jumpers ................

  • Page 10: Installing The Cpu

    INSTALLATIONS Installing the CPU The MB941 motherboard supports an LGA 775 processor socket for Intel® Core 2 Duo processors. The LGA 775 processor socket comes with a lever to secure the processor. Refer to the pictures below, from left to right, on how to place the processor into the CPU socket.

  • Page 11: Installing The Memory

    INSTALLATIONS Installing the Memory The MB941 motherboard supports two DDR3 memory sockets for a maximum total memory of 8GB. It supports DDR3 800/1066MHz. Basically, the system memory interface has the following features: Supports two 64-bit wide DDR data channels Available bandwidth up to 6.4GB/s (DDR3 1066) for two-channel mode.

  • Page 12: Setting The Jumpers

    The following lists the connectors and their respective functions. Jumper Locations on MB941 ............... 9 JP2, JP1, JP7, JP6: COM1/2/3/4 RS232 +5V/+12V Power Setting ..10 JP3, JP4, JP5: RS232/422/485 (COM1) Selection......10 JP8: Clear CMOS Contents ...............
  • Page 13 INSTALLATIONS Jumper Locations on MB941 DDRⅢ 2 DDRⅢ 1 JP2, JP1, JP7, JP6: COM1/2/3/4 RS232 +5V/+12V Power Setting JP3, JP4, JP5: RS232/422/485 (COM1) Selection JP8: Clear CMOS Contents MB941 User’s Manual...
  • Page 14 JP8: Clear CMOS Contents Use JP8, a 3-pin header, to clear the CMOS contents. Note that the ATX-power connector should be disconnected from the motherboard before clearing CMOS. Setting Function Pin 1-2 Normal Short/Closed Pin 2-3 Clear CMOS Short/Closed MB941 User’s Manual...

  • Page 15: Connectors On Mb941

    INSTALLATIONS Connectors on MB941 The connectors on MB941 allow you to connect external devices such as keyboard, floppy disk drives, hard disk drives, printers, etc. The following table lists the connectors on MB941 and their respective functions. ATX1: 24-pin ATX Power Connector ..........13 ATX2: ATX 12V Power Connector...........

  • Page 16: Atx1: 24-Pin Atx Power Connector

    INSTALLATIONS Connector Locations on MB941 DDRⅢ 2 DDRⅢ 1 ATX1: 24-pin ATX Power Connector J1: COM2/RS232 Serial Port (DF11 ATX2: ATX 12V Power Connector Connector) DDRIII1: Channel A DDR3 Socket J2: For LPC I/F Adaptor Card DDRIII2: Channel B DDR3 Socket...
  • Page 17 +12V Ground DDRIII1: Channel A DDR3 Socket DDRIII2: Channel B DDR3 Socket FAN2: CPU Fan Power Connector Pin # Signal Name Ground +12V Rotation detection Control FAN1: System Fan1 Power Connector Pin # Signal Name Ground +12V MB941 User’s Manual...
  • Page 18 INSTALLATIONS Rotation detection MB941 User’s Manual...
  • Page 19 Pin # Mouse Signal Signal Keyboard data Mouse data N.C. N.C. Mouse (top) Keyboard clock Mouse clock Keyboard (bottom) N.C. N.C. CN2: COM1 RS232/RS422/RS485 Connector Pin # Signal Name RS-232 R2-422 RS-485 DATA- DATA+ Ground Ground Ground MB941 User’s Manual...
  • Page 20 Select CN4: VGA CRT Connector CN4 is a DB-15 VGA connector. The following table shows the pin-out assignments of this connector. Signal Name Pin # Pin # Signal Name Green Blue N.C. N.C. DDCDATA HSYNC VSYNC DDCCLK MB941 User’s Manual...

  • Page 21: Cn5: Audio Connector

    DCD, Data carrier detect RXD, Receive data TXD, Transmit data DTR, Data terminal ready GND, ground DSR, Data set ready RTS, Request to send CTS, Clear to send RI, Ring indicator Not Used J2: For LPC I/F Adaptor Card MB941 User’s Manual...

  • Page 22: J3: Digital I/O Connector (4 In, 4 Out)

    Signal Name DSR3 DCD3 RTS3 RXD3 CTS3 TXD3 DTR3 Ground DSR4 DCD4 RTS4 RXD4 CTS4 TXD4 DTR4 Ground J5: Compact Flash Socket J6: Audio CD-In Connector Pin # Signal Name CD Audio L Ground Ground CD Audio R MB941 User’s Manual...

  • Page 23: J7: Audio Front Header

    ATX Power On Switch Not Defined Power LED Speaker Speaker: Pins 1 - 4 This connector provides an interface to a speaker for audio tone generation. An 8-ohm speaker is recommended. Pin # Signal Name Speaker out No connect Ground MB941 User’s Manual...
  • Page 24 Hard Disk Drive LED Connector: Pins 10 and 20 This connector connects to the hard drive activity LED on control panel. This LED will flash when the HDD is being accessed. Pin # Signal Name HDD Active MB941 User’s Manual...

  • Page 25: J9: Usb4/Usb5 Connector

    Ground Ground Protect Pin J10: USB6/USB7 Connector Signal Name Signal Name Ground Ground Protect Pin J11: SPI Debug Tools Port (Factory use only) PCI1, PCI2: PCI Slot PCIE1: x16 PCI Express Slot PCIE2: x1 PCI Express Slot MB941 User’s Manual...

  • Page 26: Bios Setup

    BIOS SETUP BIOS Setup This chapter describes the different settings available in the AMI BIOS that comes with the board. The topics covered in this chapter are as follows: BIOS Introduction ................23 BIOS Setup ..................23 Main BIOS Setup ................24 Advanced Settings ................

  • Page 27: Bios Introduction

    <PgUp> and <PgDn> keys to change entries, <F1> for help and <Esc> to quit. When you enter the Setup utility, the Main Menu screen will appear on the screen. The Main Menu allows you to select from various setup functions and exit choices. MB941 User’s Manual...

  • Page 28: Main Bios Setup

    Note: If the system cannot boot after making and saving system changes with Setup, the AMI BIOS supports an override to the CMOS settings that resets your system to its default. Warning: It is strongly recommended that you avoid making any changes to the chipset defaults.

  • Page 29: Advanced Settings

    The fields in each section are shown in the following pages, as seen in the computer screen. Please note that setting the wrong values may cause the system to malfunction. If unsure, please contact technical support of your supplier. MB941 User’s Manual...
  • Page 30 Manufacturer: the name of the CPU manufacturer Brand String: the brand name of the CPU being used Frequency: the CPU processing speed FSB Speed: the FSB speed Cache L1: the CPU L1 cache size Cache L2: the CPU L2 cache MB941 User’s Manual...
  • Page 31 These fields allow you to select the onboard serial ports and their addresses. The default values for these ports are: Serial Port 1 3F8/IRQ4 Serial Port 2 2F8/IRQ3 Serial Port 3 3E0/IRQ10 Serial Port 4 Disabled Parallel Port 378/IRQ7 MB941 User’s Manual...
  • Page 32 ECP+EPP Combination of ECP and EPP capabilities Normal Normal function Restore on AC Power Loss This field sets the system power status whether on or off when power returns to the system from a power failure situation. MB941 User’s Manual...

  • Page 33: Acpi Shutdown Temperature

    BIOS SETUP UTILITY Advanced Main PCIPnP Boot Security Chipset Exit ACPI Settings General ACPI Configuration settings ►General ACPI Configuration <- Select Screen ↑↓ Select Item Change Field Tab Select Field General Help F10 Save and Exit ESC Exit MB941 User’s Manual...

  • Page 34: Suspend Mode

    ↑↓ Select Item Change Field Tab Select Field General Help F10 Save and Exit ESC Exit Suspend Mode The options of this field are S1, S3 and Auto. Repost Video on S3 Resume The default setting is No. MB941 User’s Manual...

  • Page 35: Resume On Ring

    This option is used enable activity on the PCI PME (power managementevent) controller to wake up the system from a suspend or standby state Resume On RTC Alarm This option is used to specify the time the system should be awakened from a suspended state MB941 User’s Manual...

  • Page 36: Mps Version Control For Os

    Change Field Tab Select Field General Help F10 Save and Exit ESC Exit SMBIOS SMI Support Use the SMBIOS SMI Support to enable the system to support the SMBIOS SMI wrapper for the PnP function 50h – 54h. MB941 User’s Manual...

  • Page 37: Legacy Usb Support

    USB 2.0 Controller Mode This option is used to control USB device in HiSpeed (480Mbps) or FullSpeed (12Mbps).This option is enabled by HiSpeed. BIOS EHCI Hand-Off This feature allows you to enable support for operating system without EHCI hand-off feature. MB941 User’s Manual...

  • Page 38: Pcipnp Settings

    PnP devices not required for boot if your system has a Plug and Play OS. PCI Latency Timer This item sets value in units of PCI clocks for PCI device latency timer register. Options are: 32, 64, 96, 128, 160, 192, 224, 248. MB941 User’s Manual...
  • Page 39 Some PCI IDE cards may require this to be set to the PCI slot number that is holding the card. IRQ# Use the IRQ# address to specify what IRQs can be assigned to a particular peripheral device MB941 User’s Manual...

  • Page 40: Boot Settings

    When set to Enabled, the system waits for the F1 key to be pressed when error occurs. This allows option ROM to trap interrupt 19. Hit <DEL> Message Display This displays “Press <DEL> to run Setup” in POST. MB941 User’s Manual...
  • Page 41 BIOS SETUP Interrupt 19 Capture This allows option ROM to trap interrupt 19. MB941 User’s Manual...

  • Page 42: Security Settings

    : Not Installed User Password : Not Installed <- Select Screen Change Supervisor Password ↑↓ Select Item Change User Password Change Field Tab Select Field Boot Sector Virus Protection [Disabled] General Help F10 Save and Exit ESC Exit MB941 User’s Manual...

  • Page 43: Advanced Chipset Settings

    F10 Save and Exit PEG Port [Auto] ESC Exit Video Function Configuration ► Memory Remap Feature This feature allows remapping of overlapped PCI memory above the total physical memory. DRAM Frequency This option is, by default, set to Auto. MB941 User’s Manual...
  • Page 44 Advanced PCIPnP Boot Security Exit Video Function Configuration DVMT Mode DVMT Mode Select [DVMT Mode] DVMT/FIXED Memory [256MB] <- Select Screen ↑↓ Select Item Change Field Tab Select Field General Help F10 Save and Exit ESC Exit MB941 User’s Manual...
  • Page 45 BIOS SETUP MB941 User’s Manual...

  • Page 46: Usb Function

    This option enables the number of USB ports desired or disables the USB function. USB 2.0 Controller This option is disabled by default. Audio Controller This option is used to enable the Southbridge high definition audio controller. MB941 User’s Manual...

  • Page 47: Exit Setup

    These default settings are optimal and enable all high performance features. Load Failsafe Defaults This option allows you to load the troubleshooting default values permanently stored in the BIOS ROM. These default settings are non-optimal and disable all high-performance features. MB941 User’s Manual...

  • Page 48: Drivers Installation

    Realtek High Definition Audio Driver Installation ......51 Realtek LAN Controller Drivers Installation ........53 IMPORTANT NOTE: After installing your Windows operating system (Windows XP/ Vista), you must install first the Intel Chipset Software Installation Utility before proceeding with the drivers installation. MB941 User’s Manual...

  • Page 49: Intel Chipset Software Installation Utility

    Follow the instructions below to complete the installation under Windows XP/Vista. 1. Insert the CD that comes with the board. Click Intel at the left side, then Intel(R) G41 Chipset Drivers. 2. Click Intel(R) Chipset Software Installation Utility. MB941 User’s Manual...
  • Page 50 DRIVERS INSTALLATION 3. When the welcome screen to the Intel(R) Chipset Software Installation Utility appears, click Next to continue. 4. Click Yes to accept the software license agreement and proceed with the installation process. MB941 User’s Manual...
  • Page 51 DRIVERS INSTALLATION 5. On Readme Information screen, click Next to continue the installation. 6. The Setup process is now complete. Click Finish to restart the computer and for changes to take effect. MB941 User’s Manual...

  • Page 52: Intel G41 Chipset Family Graphics Driver Installation

    To install the VGA drivers, follow the steps below to proceed with the installation. 1. Insert the CD that comes with the board. Click Intel at the left side, then Intel(R) G41 Chipset Drivers. 2. Click Intel G41 Chipset Family Graphics Driver. MB941 User’s Manual...
  • Page 53 DRIVERS INSTALLATION 3. When the welcome screen of the Intel(R) Graphics Media Accelerator Driver appears, click Next to continue. 4. Click Yes to to agree with the license agreement and continue the installation. MB941 User’s Manual...
  • Page 54 DRIVERS INSTALLATION 5. Click Next in the Readme File Information window. 6. Click Next in the Setup Progress window. 7. Setup is now complete. Click Finish to restart the computer and for changes to take effect. MB941 User’s Manual...

  • Page 55: Realtek High Definition Audio Driver Installation

    Installation Follow the steps below to install the Realtek HD Codec Audio Drivers. 1. Insert the CD that comes with the board. Click Intel and then Intel(R) G41 Chipset Drivers. 2. Click Realtek High Definition Audio Driver. MB941 User’s Manual...
  • Page 56 3.When the welcome screen to InstallShield Wizard for Realtek High Definition Audio Driver appears, click Next to start the installation. 4.When the InstallShieldWizard has finished performing maintenance operations on Realtek High Definition Codec Audio Audio Driver, click Finish to restart the computer. MB941 User’s Manual...

  • Page 57: Realtek Lan Controller Drivers Installation

    Realtek LAN Controller Drivers Installation Follow the steps below to install the Realtek LAN Drivers. 1. Insert the CD that comes with the board. Click Intel, then LAN Card, and then Realtek Lan Controller Drivers. 2. Click Realtek RTL8111E LAN Drivers. MB941 User’s Manual...
  • Page 58 DRIVERS INSTALLATION 3.When the welcome screen to InstallShield Wizard appears, click Next to start the installation. 4.When the InstallShieldWizard has finished installing the Realtek LAN drivers, click Finish. MB941 User’s Manual...

  • Page 59: Appendix

    Parallel Port #1(LPT1) 360h - 36Fh Network Ports 3B0h - 3BFh Monochrome & Printer adapter 3C0h - 3CFh EGA adapter 3D0h - 3DFh CGA adapter 3F0h - 3F7h Floppy Disk Controller 3F8h - 3FFh Serial Port #1(COM1) MB941 User’s Manual...

  • Page 60: Interrupt Request Lines (Irq)

    Serial Port #2 IRQ4 Serial Port #1 IRQ5 Reserved IRQ6 Reserved IRQ7 Parallel Port #1 IRQ8 Real Time Clock IRQ9 Reserved IRQ10 Serial Port #4 IRQ11 Serial Port #3 IRQ12 PS/2 Mouse IRQ13 80287 IRQ14 Primary IDE MB941 User’s Manual...

  • Page 61: Watchdog Timer Configuration

    (ucDid == 0xA2) //W83627UHG?? goto Init_Finish; } W627UHG_BASE = 0x2E; result = W627UHG_BASE; ucDid = Get_W627UHG_Reg(0x20); if (ucDid == 0xA2) //W83627UHG?? goto Init_Finish; } W627UHG_BASE = 0x00; result = W627UHG_BASE; Init_Finish: return (result); //--------------------------------------------------------------------------- void Unlock_W627UHG (void) MB941 User’s Manual...
  • Page 62 LD); Lock_W627UHG(); //--------------------------------------------------------------------------- void Set_W627UHG_Reg( unsigned char REG, unsigned char DATA) Unlock_W627UHG(); outportb(W627UHG_INDEX_PORT, REG); outportb(W627UHG_DATA_PORT, DATA); Lock_W627UHG(); //--------------------------------------------------------------------------- unsigned char Get_W627UHG_Reg(unsigned char REG) unsigned char Result; Unlock_W627UHG(); outportb(W627UHG_INDEX_PORT, REG); Result = inportb(W627UHG_DATA_PORT); Lock_W627UHG(); return Result; //--------------------------------------------------------------------------- MB941 User’s Manual...
  • Page 63 (W627UHG_BASE) #define W627UHG_DATA_PORT (W627UHG_BASE+1) //--------------------------------------------------------------------------- #define W627UHG_REG_LD 0x07 //--------------------------------------------------------------------------- #define W627UHG_UNLOCK 0x87 #define W627UHG_LOCK 0xAA //--------------------------------------------------------------------------- unsigned int Init_W627UHG(void); void Set_W627UHG_LD( unsigned char); void Set_W627UHG_Reg( unsigned char, unsigned char); unsigned char Get_W627UHG_Reg( unsigned char); //--------------------------------------------------------------------------- #endif //__W627UHG_H MB941 User’s Manual...
  • Page 64 //--------------------------------------------------------------------------- void WDTInitial(void) unsigned char bBuf; Set_W627UHG_LD(0x08);..............//switch to logic device 8 bBuf = Get_W627UHG_Reg(0x30); bBuf &= (~0x01); Set_W627UHG_Reg(0x30, bBuf); ..............//Enable WDTO //--------------------------------------------------------------------------- void WDTEnable(unsigned char NewInterval) unsigned char bBuf; Set_W627UHG_LD(0x08);......................Set_W627UHG_Reg(0x30, 0x01); ............... //enable timer MB941 User’s Manual...
  • Page 65 APPENDIX bBuf = Get_W627UHG_Reg(0xF5); bBuf &= (~0x08); Set_W627UHG_Reg(0xF5, bBuf); ............//count mode is second Set_W627UHG_Reg(0xF6, NewInterval); ..............//set timer //--------------------------------------------------------------------------- void WDTDisable(void) Set_W627UHG_LD(0x08);......................Set_W627UHG_Reg(0xF6, 0x00);............//clear watchdog timer Set_W627UHG_Reg(0x30, 0x00); ..................... //--------------------------------------------------------------------------- MB941 User’s Manual...

  • Page 66: Digital I/O Sample Code

    (W627UHG_BASE) #define W627UHG_DATA_PORT (W627UHG_BASE+1) //--------------------------------------------------------------------------- #define W627UHG_REG_LD 0x07 //--------------------------------------------------------------------------- #define W627UHG_UNLOCK 0x87 #define W627UHG_LOCK 0xAA //--------------------------------------------------------------------------- unsigned int Init_W627UHG(void); void Set_W627UHG_LD( unsigned char); void Set_W627UHG_Reg( unsigned char, unsigned char); unsigned char Get_W627UHG_Reg( unsigned char); //--------------------------------------------------------------------------- #endif //__W627UHG_H MB941 User’s Manual...
  • Page 67 (ucDid == 0xA2) //W83627UHG?? goto Init_Finish; } W627UHG_BASE = 0x00; result = W627UHG_BASE; Init_Finish: return (result); //--------------------------------------------------------------------------- void Unlock_W627UHG (void) outportb(W627UHG_INDEX_PORT, W627UHG_UNLOCK); outportb(W627UHG_INDEX_PORT, W627UHG_UNLOCK); //--------------------------------------------------------------------------- void Lock_W627UHG (void) outportb(W627UHG_INDEX_PORT, W627UHG_LOCK); //--------------------------------------------------------------------------- void Set_W627UHG_LD( unsigned char LD) MB941 User’s Manual...
  • Page 68 LD); Lock_W627UHG(); //--------------------------------------------------------------------------- void Set_W627UHG_Reg( unsigned char REG, unsigned char DATA) Unlock_W627UHG(); outportb(W627UHG_INDEX_PORT, REG); outportb(W627UHG_DATA_PORT, DATA); Lock_W627UHG(); //--------------------------------------------------------------------------- unsigned char Get_W627UHG_Reg(unsigned char REG) unsigned char Result; Unlock_W627UHG(); outportb(W627UHG_INDEX_PORT, REG); Result = inportb(W627UHG_DATA_PORT); Lock_W627UHG(); return Result; //--------------------------------------------------------------------------- MB941 User’s Manual...
  • Page 69 Winbond 83627UHG, program abort.\n"); return(1); Dio5Initial(); //for GPIO50..57 Dio5SetDirection(0x0F); //GP50..53 = input, GP54..57=output printf("Current DIO direction = 0x%X\n", Dio5GetDirection()); printf("Current DIO status = 0x%X\n", Dio5GetInput()); printf("Set DIO output to high\n"); Dio5SetOutput(0x0F); printf("Set DIO output to low\n"); Dio5SetOutput(0x00); return 0; MB941 User’s Manual...
  • Page 70 Dio5SetDirection(unsigned char NewData) //NewData : 1 for input, 0 for output Set_W627UHG_LD(0x08); //switch to logic device 8 Set_W627UHG_Reg(0xE0, NewData); //--------------------------------------------------------------------------- unsigned char Dio5GetDirection(void) unsigned char result; Set_W627UHG_LD(0x08); //switch to logic device 8 result = Get_W627UHG_Reg(0xE0); return (result); //--------------------------------------------------------------------------- MB941 User’s Manual...

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