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Shuttle Spacewalker AV41 User Manual

Pentium 4 processor based main board
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AV41
Pentium 4
Processor
Based MAIN BOARD
User's Manual

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Summary of Contents for Shuttle Spacewalker AV41

  • Page 1 AV41 Pentium 4 Processor Based MAIN BOARD User's Manual...
  • Page 2 The information contained in this manual is provided for general use by the customers. Trademarks Spacewalker is a registered trademark of Shuttle Inc. Intel, Pentium is a registered trademarks of Intel Corporation. VIA is a registered trademark of VIA Corporation.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS WHAT’S IN THE MANUAL ..............5 Quick Reference ....................5 About This Manual .................... 5 1 INTRODUCTION .................. 6 1.1 TO DIFFERENT USERS ................6 FIRST-TIME DIY SYSTEM BUILDER ............6 EXPERIENCED DIY USER ................. 6 SYSTEM INTEGRATOR ................6 1.2 ITEM CHECKLIST: ..................
  • Page 4 3.2 JUMPER SETTINGS .................. 26 JUMPERS & CONNECTORS GUIDE............. 27 Jumpers Clear CMOS Setting (JP1)..............30 BIOS flash protection Setting (JP3) ............30 Back-Panel Connectors PS/2 Keyboard & PS/2 Mouse Connectors ..........31 USB1/USB2 Port Connectors ..............31 COM1/2 Port Connectors ..............31 Parallel Port Connector ................
  • Page 5 Extended USB Headers (USB2/USB3) ........... 38 MIC/speaker-out header(AUDIO) ............39 Single color MSG LED(SJ1) ..............40 3.3 SYSTEM MEMORY CONFIGURATION ............41 1. INSTALL MEMORY ................41 2. UPGRADE MEMORY ................ 41 4 SOFTWARE UTILITY ................. 42 4.1 AV41 Mainboard CD Overview..............42 4.2 Install Mainboard Software ..............
  • Page 6 SET USER PASSWORD ................73 SAVE & EXIT SETUP ................. 75 EXIT WITHOUT SAVING ................75 - 4 -...

  • Page 7: What's In The Manual

    WHAT’S IN THE MANUAL Quick Reference Hardware Installation >> Step-by-Step ..........Page 11 Jumper Settings >> A Closer Look ............Page 26 Drivers/Software Utilities >> How to Install ......... Page 42 BIOS Setup >> How to Configure ............Page 46 About This Manual For First-Time DIY System Builder............

  • Page 8: Introduction

    Shuttle AV41 mainboard. Experienced DIY User Congratulate on your purchase of the Shuttle AV41 mainboard. You will find that installing your new Shuttle AV41 mainboard is just easy. Bundled with an array of onboard functions, the highly-integrated AV41 mainboard pro- vides you with a total solution to build the most stable and reliable system.

  • Page 9: Item Checklist

    1.2 Item Checklist: Check all items with you AV41 mainboard to make sure nothing is miss- ing. The complete package should include: ­ One piece of Shuttle AV41 Mainboard C D 2 C P U FA N 1 AUD I O...

  • Page 10: Features

    2 FEATURES AV41 mainboard is carefully designed for the demanding PC user who wants high performance and maximum intelligent features in a compact package. 2.1 Specifications ­ ­ ­ ­ ­ CPU Support Intel Pentium 4, 478-pin processors with 100 MHz FSB. ­...
  • Page 11 Ø 1*PS/2 mouse connector. Ø 1*PS/2 Keyboard connector. Ø 2*DB9 Serial connectors 16550 UART compatible. Ø 1*Infrared communication port. (Serial port COM2 can also be redirected to an external IrDA Adapter for wireless connection.) Ø 1*DB25 Parallel port supports Standard Parallel Port and Bi-directional (SPP), Enhanced Parallel Port (EPP), and Extended Capabilities Port (ECP) data transmission schemes.
  • Page 12 ­ ­ ­ ­ ­ System BIOS Provides licensed Award BIOS V6.0 PG on 2Mb Flash core and supports Green PC, Desktop Management Interface (DMI). ­ ­ ­ ­ ­ ATX Form Factor System board conforms to ATX specification. Board dimension: 305mm*190mm. ­...

  • Page 13: Hardware Installation

    3 HARDWARE INSTALLATION Before removing or installing any of these devices including CPU, DIMMs, Add-On Cards, Cables, please make sure to unplug the onboard power connector. This section outlines how to install and configure your mainboard. Refer to the following mainboard layout to help you to identify various jumpers, connectors, slots, and ports.

  • Page 14: Step 1 Install The Cpu

    Step 1 CPU Installation: This mainboard supports Intel Pentium 4 Socket 478 series CPU. Please follow the step as below to finish CPU installation. Be careful of CPU orientation when you plug it into CPU socket. 1. Pull up the CPU socket level and up to 90-degree angle. CPU socket level up to 90 degree 2.
  • Page 15 3. Press down the CPU socket level and finish CPU installation. Note: If you do not match the CPU socket Pin 1 and CPU cut edge well, it may damage the CPU. - 13 -...

  • Page 16: Step 2 Set Jumpers

    Step 2. Set Jumpers This mainboard is jumperless! The default jumper settings have been set for the common usage standard of this mainboard. Therefore, you do not need to reset the jumpers unless you require special adjustments as any of the following cases: 1.

  • Page 17: Step 4 Install Peripherals In System Case

    Step 4 Install Internal Peripherals in System Case Before you install and connect the mainboard into your system case, we recommend that you first assemble all the internal peripheral devices into the computer housing, including but not limited to the hard disk drive (IDE/ HDD), floppy disk drive (FDD), CD-ROM drive, and ATX power supply unit.

  • Page 18: Step 5 Mount The Mainboard On The Computer Chassis

    Step 5 Mount the Mainboard on the Computer Chassis 1. You may find that there are a lot of different mounting hole positions both on your computer chassis and on the mainboard. To choose correct mounting holes, the key point is to keep the back-panel of the mainboard in a close fit with your system case, as shown below.

  • Page 19: Step 6 Connect Front Panel Switches/Leds/Speaker/Usb

    Step 6 Connect Front Panel Switches/LEDs/USB You can find there are several different cables already existing in the system case and originating from the computer's front-panel devices (HDD LED, Power LED, Reset Switch, or USB devices etc.) These cables serve to connect the front-panel switches, LEDs, and USB connectors to the mainboard's front-panel connectors group (Panel and USB2/3), as shown below.
  • Page 20 3. Power On(Power On) G re en P ow er LE D H D D R ST LE D 4. Hardware Reset Switch (RST) G re en P ow er LE D H D D R ST LE D 4. MIC/Speaker-out (AUDIO) AUDIO SPKOUTL XSPKOUTL...

  • Page 21: Step 7 Connect Ide, Ide Raid, And Floppy Disk Drives

    Step 7 Connect IDE, IDE RAID, and Floppy Disk Drives 1. IDE cable connector 1,- 2. Floppy cable connector - 19 -...

  • Page 22: Step 8 Connect Other Internal Peripherals

    Step 8 Connect Other Internal Peripherals 1. CD1/CD2 connectors Step 9 Connect the Power Supply 1. System power connector - 20 -...

  • Page 23: Step 10 Install Add-On Cards In Expansion Slots

    Step 10 Install Add-on Cards in Expansion Slots 1. Accelerated Graphics Port (AGP) Card 2. PCI Card 3. CNR Slot - 21 -...

  • Page 24: Step 11 Connect External Peripherals To Back-Panel

    Step 11 Connect External Peripherals to Back-Panel You are now ready to put the computer case back together and get on to the external peripherals connections to your system's back-panel. U SB1 1. PS/2 Mouse and PS/2 Keyboard PS/2 Mouse PS/2 keyboard 2.
  • Page 25 4. Parallel Port foxcon n Parallel Port 5. GAME Port GAME Port 6. Audio Line-Out /Line-In / Mic-In Ports Line-Out Port Line-In Port Mic-In Port - 23 -...

  • Page 26: Step 12 First Time System Boot Up

    Step 12 First Time System Boot Up To assure the completeness and correctness of your system installation, you may check the above installation steps once again before you boot up your system for the first time. 1. Insert a bootable system floppy disk (DOS 6.2x, Windows 95/98/NT, or others) which contains FDISK and FORMAT utilities into the FDD.

  • Page 27: Step 13 Install Drivers & Software Components

    Step 13 Install Drivers & Software Components Please note that all the system utilities and drivers are designed for Win 9x operating systems only. Make sure your operating system is already installed before running the drivers installation CD-ROM programs. 1. Insert the AV41 bundled CD-ROM into your CD-ROM drive. The auto-run program will display the drivers main installation window on screen.

  • Page 28: Jumper Settings

    3.2 Jumper Settings Several hardware settings are made through the use of mini jumpers to con- nect jumper pins on the mainboard. Pin #1 could be located at any corner of each jumper, you just find the location with a white right angle which stands for pin 1#.

  • Page 29: Jumpers & Connectors Guide

    Jumpers & Connectors Guide Use the mainboard layout on page 11 to locate CPU socket, memory banks, expansion slots, jumpers and connectors on the mainboard during the installation. The following list will help you to identify jumpers, slots, and connectors along with their assigned functions: B3~B 4 B5~B 8 C1~C 4...

  • Page 30: Jumpers

    Jumpers : Clear CMOS setting : BIOS protect Back Panel Connectors : PS/2 keyboard port : PS/2 mouse port : 2 USB (Universal Serial Bus) ports COM1/2 : Serial ports 1/2 (DB9 male) PRINTER : Parallel port (DB25 female) LINE_OUT : Line-Out port LINE_IN : Line-In port...
  • Page 31 AUDIO : Audio headers : Single color LED header (Reserved for future use) - 29 -...

  • Page 32: Clear Cmos Setting (Jp1)

    F F F F F Jumpers Clear CMOS Setting (JP1) JP1 is used to clear CMOS data. Clearing CMOS will result in the perma- nently erasing previous system configuration settings and the restoring origi- nal (factory-set) system settings. Pin 1-2 (Default) Pin 2-3 (Clear CMOS) Step 1.

  • Page 33: Back-Panel Connectors

    F F F F F Back-Panel Connectors PS/2 Keyboard & PS/2 Mouse Connectors Two 6-pin female PS/2 keyboard & Mouse connectors are located at the rear panel of the mainboard. Depending on the com- PS/2 Mouse puter housing you use (desktop or tower), the PS/2 Mouse connector is situated at the top of the PS/2 Keyboard connector when the mainboard is laid into a desktop, as op-...

  • Page 34: Line-Out Port Connector

    Line-Out Port Connector Line-Out is a stereo output port through which the combined signal of all internal and external audio sources on the board is output. It can be connected to 1/8-inch TRS stereo headphones or to amplified speakers Line-Out Port Line-In Port Connector Line-In is a stereo line-level input port that accepts a 1/8-inch TRS stereo plug.

  • Page 35: Front-Panel Connectors

    F F F F F Front-Panel Connectors Green LED Connector (Green LED ) The Green LED (Green LED) indicates that the system is currently in one of the power saving mode (Doze/Standby/Suspend). When the system resumes to normal operation mode, the Green LED will go off. Attach a 2-pin Green LED cable to Green LED header.

  • Page 36: Atx Power On/Off Switch Connector (Power On)

    ATX Power On/Off Switch Connector (Power ON) The Power On/Off Switch is a momentary type switch used for turning on or off the system ATX power supply. Attach the connector cable from the Power Switch to the 2-pin Power ON header on the mainboard. Gree Pow er HD D...

  • Page 37: Internal Peripherals Connectors

    F F F F F Internal Peripherals Connectors Enhanced IDE, and Floppy Connectors The mainboard features two 40-pin dual-channel IDE device connectors (IDE1/IDE2) providing support for up to four IDE devices, such as CD-ROM and Hard Disk Drives (H.D.D.) This mainboard also includes one 34-pin floppy disk controller (FDD1) to accommodate the Floppy Disk Drive (FDD).

  • Page 38: Other Connectors Atx Power Supply Connector (Atx1)

    F F F F F Other Connectors ATX Power Supply Connector (ATX1) This motherboard uses 20-pin Pentium 4 standard ATX power header, ATX1 and comes with another two headers. Please make sure you plug in the right direction. ATX1 A traditional ATX system should remain at power off stage when AC power resumes from power failure.

  • Page 39: Cpu, Chipset And Chassis Fan Connectors(Fan1/2)

    CPU, Chipset and Chassis Fan connectors - FAN1/2 The mainboard provides three onboard 12V cooling fan power connectors to support CPU (FAN1), System (FAN2) cooling fans. Note: Both cable wiring and type of plug may vary , which depends on the fan maker. Keep in mind that the red wire should always be connected to the +12V header and the black wire to the ground (GND) header.

  • Page 40: Wake-On-Lan Connector (Wol1)

    Wake-On-LAN Connector (WOL1) Attach a 3-pin connector through the LAN card which supports the Wake- On-LAN (WOL1) function. This function lets users wake up the connected system through the LAN card. Pins Assignment: 1=5VSB 2=Ground 3=SENSE WOL1 CD_IN Connector (CD1/2) Port CD1/2 is used to attach an audio connector cable from the CD-ROM drive.

  • Page 41: Mic/Speaker-Out Header(Audio)

    Pins Assignment: 1=+5V 3=USBP2-N 5=USBP2-P 7=GND 9=Empty 2=+5V 4=USBP3-N 6=USBP3-P 8=GND 10=OC# MIC/speaker-out header(AUDIO) The headers allows the user to install auxiliary front-oriented microphone and line-out ports for easier access. Pins Assignment: 1=MICIN 3=MICBIAS AUDIO 5=SPKOUTR 7=Key 9=SPKOUTL 2=AGND 4=5V 6=XSPKOUTR 8=Empty 10=XSPKOUTL...

  • Page 42: Single Color Msg Led(Sj1)

    Single color MSG LED (SJ1) The headers is reserved for future use. Pins Assignment: 1=SUSLED-Y 2=SUSLED-Y 3=PWLED+ - 40 -...

  • Page 43: System Memory Configuration

    3.3 System Memory Configuration The AV41 mainboard has three 168-pin DIMM banks that allow you to install from 64MB up to 1.5GB of unbuffered memory or up to 3GB regis- tered memory. Each 168-pin DIMM (Dual In-line Memory Module) bank can accommo- date 64MB, 128MB, 256MB, 512MB, and 1GB (registered) PC100/PC133 compliant 3.3V single or double side 64-bit wide data path SDR SDRAM modules.

  • Page 44: Software Utility

    F Install Audio Driver - Install audio driver. F Manual - AV41 mainboard user's manual by PDF format. F Link to Shuttle Homepage - Link to shuttle website homepage. F Browse this CD - Allows you to see contents of this CD.

  • Page 45: Install Mainboard Software

    Insert the attached CD into your CD-ROM drive and the CD AutoRun screen should appear. If the AutoRun screen does not appear, double click on Autorun icon in My Computer to bring up Shuttle Mainboard Software Setup screen. Use your pointing device (e.g. mouse) to select "Install VIA Driver" bar.

  • Page 46: Install Audio Driver

    4.3 Install Audio Driver Use your pointing device (e.g. mouse) to “Install Audio Driver" bar to install audio driver. Once you made the selection, a Setup window run the installation automatically. When the copying files is done, make sure you reboot system to take the installation effect.

  • Page 47: View The User's Manual

    Insert the attached CD into your CD-ROM drive and the CD AutoRun screen should appear. If the AutoRun screen does not appear, double click on AutoRun icon in My Computer to bring up Shuttle Mainboard Software Setup screen. Select using your pointing device (e.g. mouse) on the “Manual" bar.

  • Page 48: Bios Setup

    5 BIOS SETUP AV41 BIOS ROM has a built-in Setup program that allows users to modify the basic system configuration. This information is stored in battery-backed RAM so that it retains the Setup information even if the system power is turned off. The system BIOS is managing and executing a variety of hardware related functions in the system, including: System date and time...

  • Page 49: The Main Menu

    5.2 The Main Menu Once you enter the AwardBIOS(tm) CMOS Setup Utility, the Main Menu will appear on the screen. The Main Menu allows you to select from several setup functions and two exit choices. Use the arrow keys to select among the items and press <Enter> to accept and enter the sub-menu.
  • Page 50 PnP / PCI Configurations This entry appears if your system supports PnP / PCI. PC Health Status This entry shows the current system temperature, Voltage, and FAN speed. Frequency/Voltage Control Use this menu to specify your settings for frequency/voltage control. Load Fail-Safe Defaults Use this menu to load the BIOS default values for the minimal/stable performance of your system to operate.

  • Page 51: Standard Cmos Features

    Standard CMOS Features The items in Standard CMOS Setup Menu are divided into 10 catego- ries. Each category includes no, one or more than one setup items. Use the arrow keys to highlight the item and then use the <PgUp> or <PgDn>...
  • Page 52 IDE Secondary Master/Slave Options are in its sub-menu. Press <Enter> to enter the sub-menu of detailed options. Drive A/Drive B Select the type of floppy disk drive installed in your system. Ø The choice: None, 360K, 5.25 in, 1.2M, 5.25 in, 720K, 3.5 in, 1.44M, 3.5 in, or 2.88M, 3.5 in.
  • Page 53 IDE HDD Auto-Detection Press <Enter> to auto-detect HDD on this channel. If detection is successful, it fills the remaining fields on this menu. ØPress Enter IDE Primary Master Selecting 'manual' lets you set the remaining fields on this screen and select the type of fixed disk.

  • Page 54: Advanced Bios Features

    Advanced BIOS Features This section allows you to configure your system for basic operation. You have the opportunity to select the system's default speed, boot-up sequence, keyboard operation, shadowing, and security. Anti-Virus Protection Allows you to choose the VIRUS Warning feature for IDE Hard Disk boot sector protection.
  • Page 55 CPU L2 Cache ECC Checking When you select Enabled, memory checking is enabled when the CPU internal L2 cache contains ECC SRAMs. Ø The choice: Enabled or Disabled. Quick Power On Self Test This item speeds up Power-On Self Test (POST) after you power on the computer.
  • Page 56 Typematic Rate (Chars/Sec) This item sets how many times the keystroke will be repeated in a second when you hold the key down. Ø The choice: 6, 8, 10, 12, 15, 20, 24, or 30. Typematic Delay (Msec) Sets the delay time after the key is held down before it begins to repeat the keystroke.
  • Page 57 Report No FDD for WIN95 If you are running a system without floppy drive installed and using the Windows 95 OS, select Yes to ensure compatibility with Windows 95 logo certification. Ø The choice: Yes, No. Video BIOS Shadow Determines whether video BIOS will be copied to RAM. However, it is optional depending on chipset design.

  • Page 58: Advanced Chipset Features

    Advanced Chipset Features This section allows you to configure the system based on the specific features of the installed chipset. This chipset manages bus speeds and access to sys- tem memory resources, such as DRAM and the external cache. It also coor- dinates communications between the conventional ISA bus and the PCI bus.
  • Page 59 DRAM Timing This item lets you set Dram timing automatically if you select "By SPD". SPD (Serial Presence Detect) is an EEPROM chip on DIMM module that stores information about memory chips which contains size, speed , voltage, row and column addressed, and manufacturer. If you choose "Manual"...
  • Page 60 DRAM Command Rate This item allows you to select the DRAM executed rate. Ø The Choice: 2T Command or 1T Command. AGP & P2P Bridge Control Options are in its sub-menu. Press <Enter> to enter the sub-menu of detailed options. AGP Aperture Size Select the size of Accelerated Graphics Port (AGP) aperture.
  • Page 61 CPU & PCI Bus Control Options are in its sub-menu. Press <Enter> to enter the sub-menu of detailed options. CPU to PCI Write Buffer When this field is Enabled, the writing from CPU to PCI bus is buffered, to compensate for the speed differences between the CPU and the PCI bus.

  • Page 62: Integrated Peripherals

    Integrated Peripherals VIA OnChip IDE Device Options are in its sub-menu. Press <Enter> to enter the sub-menu of detailed options. OnChip IDE Channel 0/1 Use these items to enable or disable the PCI IDE channels that are integrated on the mainboard. Ø...
  • Page 63 Primary/Secondary Master/Slave UDMA Ultra DMA/100 implementation is possible only if your IDE hard drive supports it and the operating environment includes a DMA driver (Windows 95 OSR2 or a third-party IDE bus master driver). If both of your hard drive and your system software support Ultra DMA/100, select Auto to enable BIOS support.
  • Page 64 UR2 Duplex Mode This item allows you to select the IR half/full duplex function. Ø The choice: Full or Half. Onboard Parallel Port This item allows you to determine onboard parallel port controller I/O address setting. Ø The choice:: 378/IRQ7, 278/IRQ5, 3BC/IRQ7, or Disabled. Parallel Port Mode Select an operating mode for the onboard parallel (printer) port.
  • Page 65 USB Keyboard Support Select Enabled if your system contains a Universal Serial Bus (USB) controller and you have a USB keyboard. Ø The Choice: Enabled or Disabled. USB Mouse Support Enable this item if you plan to use a keyboard connected through the USB port in a legacy operating system (such as DOS) that does not support Plug and Play.

  • Page 66: Power Management Setup

    Power Management Setup The Power Management Setup allows you to configure your system to most effectively saving energy while operating in a manner consistent with your own style of computer use. ACPI Function This mainboard supports ACPI (Advanced Configuration and Power management Interface).
  • Page 67 HDD Power Down When this item is enabled and after the set up time of system inactivity, the hard disk drive will be powered down while all other devices remain active. Ø The choice: Disabled or 1 Min~15 Min. Suspend Mode When this item is enabled and after the set up time of system inactivity, all devices except the CPU will be shut off.
  • Page 68 PWRON After PWR- Fail This allows you to set whether you want your system to reboot after power has been interrupted. Ø The choice: Off, On, or Former-Sts. IRQ/Event Activity Detect Options are in its sub-menu. Press <Enter> to enter the sub-menu of detailed options. When this item is enabled, you can set VGA to awaken the system.
  • Page 69 Date (of Month) This item selects the alarm date. Ø Key in a DEC number:Min=0, Max=31. Resume Time (hh:mm:ss) This item selects the alarm Time. [hh] Ø Key in a DEC number:Min=0, Max=23. [mm/ss] Ø Key in a DEC number:Min=0, Max=59. IRQs Activity Monitoring Primary INTR Press Enter to on/off the wake up ability of a specified IRQ.

  • Page 70: Pnp/Pci Configuration

    PnP/PCI Configurations This section describes the configuration of PCI bus system. PCI or Personal Computer Interconnection is a system which allows I/O devices to operate at the speed CPU itself keeps when CPU communicating with its own special components. This section covers some very technical items, and it is strongly recommended that only experienced users should make any changes to the default settings.
  • Page 71 IRQ Resources When resources are controlled manually, assign each system interrupt a type, depending on the type of device using the interrupt. IRQ3/4/5/7/9/10/11/12/14/15 assigned This item allows you to determine the IRQ assigned to the ISA bus and is not available to any PCI slot. Legacy ISA for devices is compliant with the original PC AT bus specification;...

  • Page 72: Pc Health Status

    PC Health Status Shutdown Temperature Enables you to set the maximum temperature the system can reach before powering down. Ø The choice: Disabled, 60 C/140 F, 65 C/149 F, 70 C/158 System Component Characteristics These fields provide you with information about system current operat- ing status.

  • Page 73: Frequency/Voltage Control

    Frequency/Voltage Control CPU Clock Ratio Use this item to select a multiplier for the system frontside bus (FSB) frequency. The value of the multiplier must be set so that: Multiplier x Frontside Bus Frequency = CPU Clock Speed For example, if you have a processor that is rated to run at 450 MHz and the system is running a frontside bus frequency of 100 MHz, you should select a multiplier of 4.5 so that: 4.5 (Multiplier) x 100 MHz (frontside bus) = 450 MHz (CPU clock)

  • Page 74: Load Fail-Safe Defaults

    Load Fail-Safe Defaults When you press <Enter> on this item, you will get a confirmation dialog box with a message similar to: Load Fail-Safe Defaults (Y/N) ? N Pressing 'Y' loads the BIOS default values for the most stable, minimal performance of system operations. Load Optimized Defaults When you press <Enter>...

  • Page 75: Set Supervisor Password

    Supervisor/User Password Setting You can set either supervisor or user password, or both of them. The differences between them are: Supervisor Password and User Password The options on the Password screen menu make it possible to restrict access to the Setup program by enabling you to set passwords for two different access modes: Supervisor mode and User mode.
  • Page 76 Password Disable If you select System at Security Option of BIOS Features Setup Menu, you will be prompted in entering the password whenever the system is rebooted or you try to enter Setup. If you select Setup at Security Op- tion of BIOS Features Setup Menu, you will be prompted only when you try to enter Setup.
  • Page 77 Save & Exit Setup Pressing <Enter> on this item asks for confirmation: Save to CMOS and EXIT (Y/N)? Y Pressing "Y" stores the selections made in the menus of CMOS - a special section of memory that stays on after you turn your system off. The next time you boot your computer, the BIOS configures your system according to the Setup selections stored in CMOS.

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