Pentium^® II System Board
Technical Reference

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Specifications The following specifications are for the standard configuration; your system may contain optional equipment. All Specifications are subject to change without notice or obligation. Desktop case dimensions 17 x 16.25 x 6.5 (WxDxH) Tower case dimensions 9.87 x 18.64 x 22.8 (WxDxH), including base CPU Intel Pentium® II with MMX™ Technology CPU speed 233MHz and 266MHz Cache subsystem Primary, 32K write back cache; 16K code/16K data; L2 cache is integrated into the Pentium II Processor cartridge with both 256K and 512K configuration (4-way set associative) RAM capacity 60ns, 72-pin Fast Page Mode (FPM) or Extended Data Out (EDO) memory. Two banks with two slots per bank; total of four slots. Must be filled in pairs. Expandable to 256MB. BIOS AMI BIOS: Flash BIOS for easy updates from floppy disk IDE interfaces Supports up to four IDE devices (hard drives or CD-ROMs) using two on-board PCI IDE connectors; automatic drive type selection for easy setup. Floppy drive A floppy controller is integrated on the system board. Support available for primary and secondary floppy drives and a tape backup unit (TBU). I/O ports One parallel and two serial ports on system board; LPT and COM configurable from system setup program; no jumper settings required USB Universal Serial Bus (2 ports) Mouse Microsoft PS/2 mouse connector Keyboard Microsoft PS/2 keyboard connector ISA expansion slots Three (one slot is shared with PCI) PCI bus expansion slots Four (one slot is shared with ISA) Power supply 180/200 watts; ATX power connector for easy power cable changeover System environment Internal temperature: 10×C to 35×C Humidity: 20% to 80% Altitude: -200 ft. to 10,000 ft. Shock, vibration: 12g, 11ms half-sine; 2 to 200Hz, 0.25g sinusoidal CPU clearance: >0.4 inch after installation, top and sides Certification FCC Class B, UL, cUL, CE Mark, VCCI, CB Scheme Many Gateway 2000 products are custom engineered by our suppliers to Gateway 2000 specifications, and may vary with similarly marketed products.   The CMOS Setup Utility The computer’s BIOS (Basic Input/Output System) has a built-in Setup utility that allows you to set several basic system characteristics. The settings are stored in battery-backed RAM that retains information about your system when the power is off. Note: The parameters shown in the screens on the following pages may or may not match your system, depending on your system’s configuration. The screens are meant to serve as examples only; they do not necessarily indicate how you should configure your system’s Setup. To enter the setup program, press <F1> when the prompt to do so appears on the screen shortly after your computer is turned on (during what is called the boot process). After a moment, the Main Setup screen appears: Notice the separate box on the right side of the screen. This is the command portion of the screen, and it is displayed as part of every window in the Setup utility. It contains several commands that help you move through the Setup functions. Help command — Press <F1> to get information about the highlighted item; this item is only usable in a submenu. Back command — Press <Esc> to back out of any field. Select command — Press <Enter> to select submenus and options. Previous Item command — Press the up arrow to move to the previous menu item. Next Item command — Press the down arrow to move to the next menu item. Select Menu command — Use the left and right arrows to move between the four major menus. Setup Defaults command — Press <F5> to set the Setup parameters to their factory default values. A submenu appears asking you to press either <Enter> to load the defaults, or <Esc> to skip. Previous Values command — Press <F6> to set all Setup parameters to the values that were set when you entered Setup. A submenu appears asking you to press either <Enter> to discard the changes, or <Esc> to skip. Save & Exit command — Press <F10> to exit Setup and either save or ignore all changes. A submenu appears asking you to press <Enter> to save the changes, or <Esc> to ignore the changes and exit.   Using the Main CMOS Setup menu Now that you can move around the Setup screens, return to the Main Setup menu and look at the options. Several items of information in this menu tell you about your system. You can change some of the items; others are provided solely for your information.   System time and date These fields provide you with the current date and time. Note that the hour is displayed as a 24-hour clock. For example, 1:00 PM is 13:00:00.   Floppy drive options Highlight this item and press <Enter> to view the floppy drive options submenu screen. This screen provides you with information about the floppy disk drives that may be installed in your system. Press <Enter> on the highlighted floppy drive type to see the options menu for floppy drive type. You should only change the floppy drive type if you have installed another floppy drive shown on the list or if CMOS values are lost. Setting the Floppy Access option to Read Only limits write access to the floppy disk drive.   Hard disk drive setup Your system can support two IDE (Integrated Drive Electronics) hard drives on the system board primary IDE connector, and two more on its secondary IDE connector. Highlight the first hard drive item, called Primary IDE Master, and press <Enter>. The Primary IDE Master submenu screen appears. The IDE device configuration default is set to Auto Configured, which allows the system to directly detect and set up the drive type every time the system boots. (With this setting you can swap drives while the system is off; the system detects the new drive configuration when you power up.) Note: The IDE Translation Mode field is the same thing as Logical Block Addressing (LBA). This field must be set to Auto Detected if the hard drive in your system is larger than 528MB, or the system won’t use the hard drive’s full capacity. Note: Specific information about your hard drive can be found either on the hard drive label or in the hard drive manual that shipped with your system. You can change the hard drive type to User Definable. You may need to choose the User Definable mode if you are running Novell (version 3.12 or older), and have a 540MB or larger size drive and do not have the updated driver (IDE.DSK) from Novell. Highlight User Definable and press <Enter>. Now you can fill in the fields with your specific information. For example, set the drive to 4960 cylinders, 16 heads, and 63 sectors. The size shows 1549MB. Note: All fields must be set manually when using this option. You cannot use the auto-detect function in any of the available fields. You can also change the hard drive type to Disabled. Choose this setting if you are using SCSI hard drives instead of IDE drives. The IDE Translation Mode controls the way your system interacts with the hard drive in terms of the drive size, capabilities, and the operating system that it uses. The default setting is Auto-Detected. The Multiple Sector Setting controls the number of sectors transferred by an IDE drive per interrupt generated. The default setting is Auto-Detected. Fast Programmed I/O Modes control the speed at which programmed I/O transfers occur on the PCI- IDE interface. The default setting is Auto-Detected. Highlight the second hard drive item, called Primary IDE Slave, and press <Enter>. The Primary IDE Slave submenu screen appears. Note: The Secondary IDE Master and Slave submenu screens essentially appear the same and have the same items as the Primary screens. Please refer to the Primary screen function descriptions to use these submenus as well. All of the fields shown on this screen function the same as those listed on the Primary IDE Master screen.   Language This field controls the language of the text strings used in both Setup and in your system. Any installed language will appear as an option in its own language. Highlight and press <Enter> to select any one.   Boot Options Highlight this item and press <Enter> to see the submenu. You can select several parameters that affect the system’s boot up configuration. The Boot Device fields (First through Fourth) allow you to choose the order in which the system’s hard drive, floppy drive, CD-ROM, etc. are booted. Choose the device you want for each field by pressing <Enter> to view the menu choices. The default Boot Device order is as follows: CD-ROM, Floppy, Hard Disk, and Disabled. Make sure any unused Boot Device fields are set to Disabled. The System Cache field controls the primary and secondary caches. We recommend leaving it set to Enabled, since setting it to Disabled degrades system performance. The Boot Speed field controls the system speed. We recommend leaving this setting to Turbo, since selecting Deturbo decreases system performance significantly. The Num Lock field controls whether the keyboard Num Lock function is turned on or off when the system boots up. Since the AnyKey keyboard has separate numeric and cursor keys, we recommend you set this to On. However, the factory default setting is Off. The Speaker field turns the on-board speaker control to On (Enabled) or Off (Disabled). The default setting is Enabled. The Setup Prompt field controls whether the Press <F1> Key to Enter Setup message is displayed during the Power On Self Test (POST). The Hard Disk Pre-Delay field allows the system to power up installed hard drives one at a time so that the system can systematically initialize the hard drives. This delay feature is necessary because some drives may hang if they are accessed too soon following power up or reset. The Typematic Rate Programming field controls whether your system uses default or user configurable values for two sub-items: Typematic Rate Delay and Typematic Rate. Since the 104+ keyboard has typematic functions built in, you can set this to Default. If you choose Override, the following two sub items appear: Typematic Rate Delay. This item sets how long a key must be held down before it begins to repeat. It is functional only if Typematic Rate Programming is set to Override. Typematic Rate. This item sets how fast a key repeats. It is functional only if Typematic Rate Programming is set to Override.   Video Mode This field in the Main menu is for information display only.   Mouse This field in the Main menu is for information display only.   Base Memory This field in the Main menu is for information display only.   Extended Memory This is an information display field in the Main menu. It should reflect your total RAM above the first 1MB.   BIOS Version This is an information display field in the Main menu. It tells you the revision number of the BIOS installed on your system.   Using the Advanced CMOS Setup menu Use the Right Arrow to toggle over to the next menu screen, the Advanced CMOS Setup menu. Like the Main menu, the Advanced menu also contains several items of information that tell you about your system. You have the option to change some of the items; others are provided solely for your information.   Processor Type This field is for information display only.   Processor Speed This field is for information display only. Note: This field will display either 233 or 266 MHz, depending on the processor in your system configuration.   Cache Size This field is for information display only.   Peripheral Configuration Press <Enter> on this highlighted option to select the Peripheral Configuration submenu. This submenu allows you to enable or disable several peripherals and on-board resources. The Primary IDE Interface field allows you to enable or disable the primary IDE hard disk drive interface. You can choose Auto (Enabled) or Disabled. The default setting is Auto. The Secondary IDE Interface field allows you to enable or disable the secondary IDE hard disk drive interface. You can choose Auto (Enabled) or Disabled. The default setting is Auto. The Floppy Interface field allows you to enable or disable the floppy diskette drive interface. You can choose Auto (Enabled) or Disabled. The default setting is Auto. The Serial Port 1 Address field allows you to select the address of serial port 1. Several options are shown in the following illustration. Note: If either serial port address is set to a specific address, that option will not appear in the menu choices for the other serial port. The default setting is Auto. If the Configuration Mode option under the Plug and Play Configuration submenu is set to Use BIOS Setup, the Setup utility assigns the first free COM port (normally COM1, 3F8h) as the serial port 1 address, regardless of what is selected under the Serial Port 1 Address option in this submenu screen. The Serial Port 2 Address field allows you to select the address of serial port 2. Several options are shown in the following illustration. The default setting is Auto. The Parallel Port Address field allows you to select the address and IRQ of the parallel port. Several options are shown in the following illustration. The default setting is Auto. The Parallel Port Mode field allows you to select the mode for the parallel port. The setting you choose depends on the type of peripheral installed with your system. Several options are shown in the following illustration. The default setting is Compatible, which is an AT spec, output only mode. Bi-directional is an input-output only mode (the parallel port operates in bi-directional PS/2-compatible mode), ECP is an Extended Capabilities Port mode (IEEE 1284), and EPP is an Enhanced Parallel Port mode (Rev. 1.7). Selecting either ECP or EPP means that the parallel port operates in both high speed and bi-directional modes. The USB (Universal Serial Bus) Interface field allows you to activate or deactivate the two stacked USB ports. Enabled activates the ports; Disabled deactivates the ports. Enabled is the default setting. See the "Enabling USB Software Drivers" section in this manual for additional information. The Hardware Monitor Interface field functions with specific Client Manager software to monitor system security. The Primary PCI IDE Status field displays the current status of the primary PCI IDE interface selected in the Primary PCI IDE Interface field. The Secondary PCI IDE Status field displays the current status of the secondary PCI IDE interface selected in the Secondary PCI IDE Interface field. The Floppy Status field displays the current status of the floppy drive as indicated in the Floppy Interface field. The Serial Port 1 Status field displays the current status of the serial port 1 address indicated in that field. The Serial Port 2 Status field displays the current status of the serial port 2 address indicated in that field. The Parallel Port Status field displays the current status of the parallel port mode indicated in that field.   Advanced Chipset Configuration Press <Enter> on this highlighted option to select the Advanced Chipset Configuration submenu. This submenu allows you to change the characteristics of your system’s base memory size and ISA LFB size, among others. The Base Memory Size controls the mapping of addresses between 512KB and 640KB. Unless you are using an ISA card that requires access to the address range of 80000h-9FFFFh, we recommend leaving this option set to the default 640KB. The ISA LFB Size allows you to create a hole in the system memory map. Accesses made to addresses within this hole are directed to the ISA bus instead of to main memory. You should set this field to Disabled unless you are using an ISA card with 64KB or greater of memory that needs to be accessed by the system, and you are not using Plug and Play run-time utilities (CM and ICU). The Video Palette Snoop, when set to Enabled, allows an ISA video card to share a common palette with a PCI graphics card. If your system is configured with only a PCI graphics card, you should leave this item set to its default setting of Disabled. The Latency Timer (PCI Clocks) field controls the length of time an agent on the PCI bus can hold the bus when another agent has requested the bus. The default is 66 and should not be changed. The Memory Error Detection field sets the type of error detection or correction. The options are Disabled, ECC (error correcting code), Parity, and Disabled. The default setting is Disabled. This field appears only if either ECC or Parity SIMMs are detected. The Bank 0 SIMM Detected and Bank 1 SIMM Detected fields automatically detect and display installed memory SIMM types, in this case Extended Data Out (EDO) SIMMs.   Power management configuration Press <Enter> on this highlighted option to select the Power Management Configuration submenu. Note: In order for Power Management to work properly in DOS, POWER.EXE must be loaded onto your system. Windows 95 has its own power management module. This submenu allows you to enable or disable several power saving features, including several settings for video. The Advanced Power Management (APM) field allows you to globally enable or disable advanced power management support in your system. If you choose Enable, the system works with APM-aware operating systems and software to manage the power consumed by the CPU, IDE drives, and graphics cards. If you choose Disabled, then none of the other fields in the Power Management Configuration submenu are displayed. The IDE Drive Power Down field controls whether or not a spin down command is issued to the IDE drives when the system goes into low power mode. Choose Enabled or Disabled. The default setting is Enabled. The VESA Video Power Down field controls the VESA power management command issued to the graphics card when the system goes into low power mode. Several settings are provided, as shown below. The proper setting is dependent upon the VESA mode(s) supported by your graphics card. The default setting is Sleep. The Inactivity Timer field controls the number of minutes that the system detects no user activity before switching to low power mode. The default setting is 20 minutes. The Hot Key field is used to define a key sequence that, when entered, causes the APM BIOS to ask an APM-aware operating system to go into immediate power managed mode. This key sequence is CTRL-ALT and whatever key you choose to complete the sequence. After selecting a key, you must press Enter to activate the Hot Key. Note: The system will go into power managed mode approximately one minute after you press the Hot Key combination. When the system goes into the power down mode, it emits a single beep to let you know that power management mode is imminent. If you have set a User Password, however, you must enter that password before the system comes out of power management mode. Instructions for setting a User Password are in the next section, "Using the Security CMOS Setup Menu." The Auto Start on AC Loss field controls whether or not the system powers itself back up following an electrical power outage. If this option is set to Enabled (the default setting), the system powers itself back up once main power is restored. However, you can also choose Disabled if you do not want the system to power up again following main power restoration. The Power-On COM1 Ring field controls whether or not the system powers up to receive an incoming modem call. If the modem is connected to COM1, this item is set to Enabled and the system detects a ring, then the system powers up to receive the modem call. This function works for external modems only. The Power-On COM1 Ring field may be set to Enabled or Disabled, depending on your system configuration (i.e., if there is a modem installed on COM1). Note: External modems must be connected to COM1.   Plug and Play Configuration Press <Enter> on this highlighted option to select the Plug and Play Configuration submenu. Note: The Plug and Play Configuration screen is a dynamic screen — the available IRQs change according to the peripherals you have installed and the IRQs they use. This submenu allows you to alter such items as the Setup utility, the ISA shared memory size, and several IRQs, which can be made directly available to or used by an ISA card. The Configuration Mode field allows you to choose the method in which information about legacy ISA cards (ISA cards that do not have Plug and Play capabilities) is conveyed to the BIOS, allowing the BIOS to set up PCI and ISA Plug and Play cards without conflicting with the legacy ISA cards. If you choose Use BIOS Setup, the BIOS depends upon information provided by you in the IRQ availability fields to prevent conflicts between Plug and Play cards and legacy ISA cards. If the Use BIOS Setup option is chosen, you should not install and use run-time Plug and Play software (Configuration Manager and ICU). If you choose Use ICU or Use PnP OS, then the BIOS uses the information provided by the run-time Plug and Play software (Configuration Manager and ICU) to ensure no conflicts with legacy ISA cards. You should choose this mode if your system is configured with these utilities and they are used. When you choose Use PnP OS, a second field appears, PnP OS, which allows you to choose the plug and play operating system. Press <Enter> to see the menu choices, as shown below. If you have Windows 95 loaded onto your system, you should select Windows 95. Returning to the Use BIOS Setup window, the ISA Shared Memory Size field is used to specify a range of memory addresses that are directed to the ISA bus rather than on-board memory. This field should be set to a memory size (16KB, 32KB, etc.) only when a non-Plug and Play ISA card (legacy card) is used which has its own non-ROM memory space. Local Area Network (LAN) cards that have on-board memory buffers are one example of this; video capture cards that have video buffer memory are another. The default (Disabled) is for all upper memory to be available for memory shadowing unless a block is unshadowed by selecting one of the other memory options. Note: Shadowing is a technique that copies a block of memory from an add-in card’s ROM to a corresponding address in system memory to allow faster access to the code and achieve higher performance. Note that if you choose an option other than Disabled, a second field appears called the ISA Shared Memory Base Address field. This field displays a corresponding base address for the unshadowed memory size you selected. You have the option to change the base address for all unshadowed memory options except 96KB, because this option takes up the entire memory block. The IRQ 3 – IRQ 15 fields are used to indicate whether individual interrupts are used by ISA legacy cards. If not used, then they should be set to Available. If they are used, they should be set to Used by ISA Card. It is important to remember that all but one can be set to Used by ISA Card. At least one IRQ must remain available for PCI cards that use interrupts to function. Note: IRQ3, IRQ4, IRQ7, IRQ14 and IRQ 15 will not be visible of they are consumed by on-board resources: Serial Port 1 (IRQ 4), Serial Port 2 (IRQ 3), Parallel Port (IRQ 7) and both IDE interfaces used (IRQ 14, 15).   Event Logging Configuration Press <Enter> on this highlighted option to select the Event Logging Configuration submenu. The Event Log Capacity field is for information display only. The Event Log Count Granularity field is for information display only. The Event Time Granularity field is for information display only. The Event Log Control field enables event logging. All Events Enabled is the default setting. The Clear Event Log field sets a flag to clear the event log the next time POST runs. Keep (the event log will not be cleared) is the default setting. The Mark Existing Events as Read field sets a flag that marks all events in the log as having been read, the next time POST runs. Do Not Mark (events will not be marked as read) is the default setting.   Using the Security CMOS Setup menu Use the right arrow to toggle over to the next main menu screen, the Security CMOS Setup menu appears. In this menu, you can set two types of passwords for your CMOS Setup program. The two types of passwords are User Passwords and Administrative Passwords. The Set User Password allows you to set a password to control access to the Setup Utility, the keyboard initial boot, and the keyboard when used along with the Security Hot Key. The Administrative Password allows you to set a password to control access to the Setup Utility only. The following table describes the interaction between these passwords: Password in Effect Enter Setup with User Password Enter Setup with Admin Password Boot User password only Can change all fields N/A User password required Admin password only N/A Can change all fields No password required Both Can change a limited number of fields* Can change all fields User or Admin password required *If the Administrative Password is in effect and you enter Setup with the User Password, you can only change System Date, System Time, User Password and Security Hot Key fields. When you press <Enter> on the highlighted Set User Password field, the following window appears: Enter your password in the "Enter New Password" block. Then, retype it in the "Confirm New Password" block. Your password is now set. The window above is shown for Set User Password, but it appears the same for Set Administrative Password. You can tell if a password has been set in either of the two fields by looking at the top of the Security menu screen. If either the User Password is or Administrative Password is fields say Enabled, then a password is in place for that field. If you are entering a new password in either field to replace an older one, the pop-up window will look about the same, except the words Enter Current Password appear at the top. If you have set a password in either of the two password fields, a third field, Unattended Start, appears. This field controls the point at which you must enter your password. If you choose Enable, you must give the password after the system has completed automatic boot activity and before you can use the keyboard (the keyboard is locked). If you choose Disable, you must give the password before the system starts automatic bootup. Another field you see if you have entered a User or Administrative password is the Security Hot Key (CTRL-ALT-) field. Use this field to define a key that, typed in sequence with <CTRL><ALT>, places the system into secure mode by locking out the keyboard. When you type in the Security Hot Key, the <Num Lock>, <Caps Lock>, and <Scroll Lock> lights on your keyboard flash on and off in sequence, indicating that your system is now secure.   Using the Exit CMOS Setup menu Use the right arrow to toggle over to the next main menu screen, the Exit CMOS Setup menu. This menu allows you to save any changes in the CMOS Setup that you may have made before exiting CMOS. You can also choose to load any Setup defaults you may want. If you press <Enter> on the Exit Saving Changes field, the following screen appears: The Exit Saving Changes field allows you to exit the Setup Utility and save the current entries for all parameters. If you press <Enter>, the system exits Setup with all parameters set to their current values. If you press <Esc>, you return to the Exit menu without saving any changes. The Exit Discarding Changes field allows you to exit the Setup Utility and discard any changes you may have made to the Setup parameters. If you press <Enter>, the system exits Setup and throws out any changes you made to the parameters. If you press <Esc>, you return to the Exit menu with no change. The Load Setup Defaults field allows you to load default values into all Setup parameters, except for passwords. If you choose <Enter>, the defaults are loaded into all Setup parameters, except for passwords. If you choose <Esc>, you return to the Exit menu with no change. The Discard Changes field allows you to undo any changes you made to the Setup parameters during this Setup session. If you choose <Enter>, any changes you made to the Setup parameters are discarded. If you choose <Esc>, you return to the Exit menu with no changes.   Removing the Cover Computers emit radio frequency energy that can interfere with television and radio reception if not contained. Do not operate the computer with the cover removed. Before opening your system case, read and follow these preventions and precautions to prevent damage from static electricity. Caution! Preventing Static Electricity Damage The components inside your system are extremely sensitive to static electricity, also known as electrostatic discharge (ESD). Static electricity can cause irreparable damage to your system; however, if you follow these preventions and precautions, you should prevent such damage. Static Electricity Preventions WEAR A GROUNDING WRIST STRAP (available at most electronic stores). Turn off the system power. Touch the back of the power supply fan, located on the back of the case. UNPLUG ALL CORDS FROM WALL OUTLET. Remove the system case cover. Static Electricity Precautions Avoid static-causing surfaces such as plastic and styrofoam in your work area. Remove parts from their antistatic bags only when you are ready to use it. Do not lay parts on the outside of antistatic bags since only the inside provides antistatic protection. Always hold cards by their edges and their metal mounting bracket. Avoid touching components on the cards and the edge connectors that connect to expansion slots. Never slide cards or other parts over any surface.   To remove the cover: Follow the static electricity preventions and precautions. Remove the screws that hold the cover in place. Refer to the user’s guide that shipped with your system for instructions. Do not remove any other screws. Carefully remove the cover. When you replace the cover, be careful not to remove or damage any brass tabs that may be around the edge of the unit, and do not catch the cover on any cables inside the unit.   Expansion Slots and Cards The system board has seven expansion slot connectors. Three connectors are ISA-bus 8/16-bit slots. Four connectors accept expansion cards with a 32-bit PCI local bus interface. The ISA connector and PCI connector next to each other share a slot location, so you can use one or the other but not both. Thus, the maximum number of slots that can be filled is six.   Installing expansion cards Two types of expansion cards are available: ISA cards and PCI cards. Many ISA expansion cards have jumpers or switches that set interrupts and I/O addresses. They also have instructions that explain how to set them to avoid conflicts. Follow these instructions carefully! If you install a PCI card, simply plug it in. Refer to the system board illustration in this chapter for the proper installation location. The system configures the card for you.   To install an ISA expansion card: Set any jumpers and switches on the card as described in the card’s instructions. Turn off the system and remove the cover. If you have a tower case, lay the unit on its side to make access to the interior easier. Locate a free expansion slot. Remove the screw securing the expansion port cover to the rear panel. Keep the port cover to reinstall if you ever remove the card. Seat the expansion card firmly in the slot. Secure the card to the rear panel with the screw from step 5. Attach any cables according to the card’s instructions. Replace the system unit cover. Install any software the card may require.   System Board Connectors ISA expansion slots PCI expansion slots CPU in a slot 1 242-pin edge connector Parallel port (top) COM1 and COM2 serial ports (bottom; COM1 closest to USB connectors and COM2 closest to PCI expansion slots) USB connectors (stacked) PS/2 mouse and keyboard connectors (stacked) PCI Bridge and Memory controller (PMC; under heat sink) Power connector SIMM sockets Data Bus Accelerator (DBX; under heat sink) Built-in speaker Battery Secondary PCI IDE connector Floppy connector Primary PCI IDE connector Intel 82371SB PCIset (PIIX3) Front panel I/O connectors Configuration jumper block Super I/O controller Flash ROM Chassis security   Description of specific system board connectors Many features on the system board allow it to function quickly and efficiently. Some of these features, shown previously, are described briefly below.   Expansion slots Up to six expansion slots may be populated on the system board; Three ISA bus expansion connectors and four PCI expansion connectors. One ISA slot and one PCI slot (the ISA and PCI slots next to each other) share connectors that can accommodate either an ISA or a PCI expansion card, but not both at the same time. Three PCI expansion slots accept PCI bus mastering cards, and fully support the PCI 2.1 specification.   Battery This external coin-cell style lithium battery supplies power to the integrated real time clock (RTC) and CMOS memory. The battery has an estimated lifetime of three years and is socketed for easy replacement. When the system is on, power is provided by the power supply to extend the life of the battery.   SIMM sockets Each pair of SIMMs is a bank. Fill the banks with identical SIMMs (a pair of the same size and type). Either Fast Page Mode (FPM) or Extended Data Out (EDO) SIMMs may be used. No jumper settings are required for the memory size or type, which is automatically detected by the system BIOS. A chart showing possible SIMM combinations can be found in the SIMM combinations chart section of this manual.   Power connector This single-unit connector supplies power to the system board components and cooling fan. It is keyed to fit only one way.   PCI bridge and memory controller (PMC) The PMC is a high-integration, efficient PCI bridge and memory controller in a 208-pin QFP package. The PCI bus connection is achieved by connecting the lower 32 bits of the Pentium II’s address bus, the control signals, and the PCI bus. The PMC transfers Pentium II to PCI data and PCI to memory data to the DBX via a 16-bit private data bus. The PMC also generates the DRAM and DBX control signals.   Super I/O controller This component is ISA Plug and Play-compatible and provides control for the integrated serial ports, parallel port, floppy drive, real time clock (RTC), and keyboard and mouse controller. The component provides: Two NS16C550-compatible UARTs with internal send/receive 16-byte FIFO Multi-mode bi-directional parallel port in standard, enhanced, and high-speed extended capabilities modes Industry standard floppy controller with 16-byte data FIFO, PC-AT and PS/2 drive mode support, and high performance digital data separator (DDS) Integrated real time clock (RTC) accurate within ±13 minutes/year, including advanced power control (APC) Integrated 8042-compatible controller, general purpose microcontroller, and 8-bit internal data bus.   Intel 82371SB PCIset (PIIX3) This component provides the interface between the PCI and ISA buses and integrates a dual channel fast IDE interface capable of supporting up to four devices with separate Master/Slave IDE mode support. The PIIX3 integrates four 8-bit and three 16-bit DMA channels, three 8-bit timers/counters, two eight-channel interrupt controllers, PCI-to-AT interrupt mapping circuitry, NMI logic, ISA refresh address generation, and PCI/ISA bus arbitration circuitry together in the same device. The PIIX3 comes in a 208-pin QFP package. The PIIX3 also has a built-in Universal Serial Bus (USB) host/hub controller with support for two ports.   Flash ROM This component serves as the storage area for the BIOS, the Setup utility, Power-On Self Test (POST), update recovery code, and the PCI auto-configuration utility. This baseboard supports system BIOS shadowing, allowing the BIOS to execute from 64-bit on-board write-protected DRAM.   FX Data Bus Accelerator (DBX) The DBX connects to the 64-bit Pentium II 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 the Pentium II based system. The DBX is a 208-pin PQF package.   IDE Support This system provides two independent high performance bus mastering PCI IDE interfaces capable of supporting PIO Mode 3 and PIO Mode 4 devices. The system BIOS supports Logical Block Addressing (LBA) and Extended Cylinder Head (ECHS) translation modes as well as ATAPI (e.g., CD-ROM) devices on both IDE interfaces. The system BIOS automatically detects the IDE device transfer rate and the translation mode capability.   Front panel connectors Speaker (on-board Piezo or external speaker) Reset switch Power LED Hard drive activity LED Infrared (IRDA) port Sleep/Resume Power on/off   Jumper Settings Jumper J9C1 on the system board allows you to alter several system functions. Use the illustrations on the following pages to set the jumpers according to the functions you need to use. The jumpers were set to their default positions at the factory, so you only need to alter the jumpers if you are changing a function.   Processor speed jumper settings The following jumper settings are used to set the CPU speed, the ISA speed, and the PCI bus speed. These speeds can be set simultaneously, or you can customize the speeds separately according to the chart at the end of this section. The system board supports two different processor speeds — 233MHz and 266MHz. These processor speeds are set by adjusting jumpers in three locations on the J9C1 jumper block. See the following illustrations for the exact settings for each processor speed. Note: The illustrations of all jumper settings for the J9C1 block show only the settings for the item being described. When you look at the J9C1 jumper block on the system board, you see all of the jumper settings together.   233MHz processor speed Set this processor speed by positioning the jumpers as shown. Note: Numbers shown in parenthesis are not screened on the system board; these appear here for your reference only.   266MHz processor speed Set this processor speed by positioning the jumpers as shown.   Jumper settings chart for system speeds Following is a chart showing the jumper settings for processor speed, memory bus speed, PCI bus speed, and ISA bus speed. You can use this chart to further customize your system to best fit your computing needs. Be sure that the processor on the system board matches these settings if you switch or upgrade processors. 233 MHz 266 MHz Ratio: 3.5 Ratio: 4.0 Host Frequency: 66MHz Host Frequency: 66MHz PCI Frequency: 33MHz PCI Frequency: 33MHz ISA Frequency: 8.33MHz ISA Frequency: 8.33MHz J9C1 Block A: 2-3 J9C1 Block A: 1-2 J9C1 Block B: 2-3 and 5-6 J9C1 Block B: 1-2 and 4-5 J9C1 Block C: 1-2 J9C1 Block C: 2-3 All other jumper settings for process frequencies on this system board are reserved.   Other important jumper block settings The following jumper settings are used to adjust the system so you can use the password enable/clear function, the CMOS clear function, the CMOS Setup access function, and the flash boot block function. These functions are enabled or disabled by adjusting jumpers on the J9C1 jumper block. See the following illustrations for the exact settings for each function.   Password enable/clear setting The following illustration shows the jumper pin settings for the password enable function. To clear the system password, power down the system and move the jumper shunt from pins D2-3 (shown) to pins D1-2. Power up the system and the password is cleared. Then, power down the system again and replace the jumper shunt to pins D2-3. This procedure should only be performed if you have forgotten your user password.   CMOS clear setting The following illustration shows the jumper pin settings for the CMOS clear function set to the normal operation position. To clear the CMOS and reset it to default values, power down the system and move the jumper shunt from pins C5-6 (shown) to pins C4-5. Power up the system and the CMOS is reset to its default values. Then power down the system again and replace the jumper shunt to pins C5-6. This procedure should be done whenever the system BIOS is updated.   CMOS Setup Utility access setting The following illustration shows the jumper settings for accessing the CMOS Setup Utility (the normal setting). To disable CMOS Setup Utility access, move the jumper shunt from pins D5-6 (shown) to pins D4-5. To regain CMOS Setup Utility access, replace the jumper shunt to pins D5-6.   Flash boot block setting The following illustration shows the jumper settings for the flash boot block normal mode (the default setting). To use the flash boot block recovery utility, move the jumper shunt from pins A5-6 (shown) to pins A4-5, which is the recovery mode setting. You must then use a recovery disk to reflash the BIOS onto your system. To restore normal operation after flashing the BIOS, replace the jumper shunt to pins A5-6. This procedure should only be performed if the system BIOS has become corrupted in some way.   Installing Memory Your computer’s system board supports up to 256MB of RAM, using two or four 4MB, 8MB, 16MB, 32MB, or 64MB SIMMs, as available. Your system board supports: 72-pin SIMM sockets with tin-plated contacts 50ns or 60ns DRAM speed only Two types of SIMMs Extended Data Out (EDO) Fast Page Mode (FPM). To see all of the possible SIMM combinations for your system, please refer to the chart in the section entitled "SIMM combinations chart." You can use either parity-checking or non-parity checking SIMMs. Memory error checking and correction (ECC) is available on this system board, and is supported only with the parity checking SIMMs. Non-parity checking SIMMs may be used, but the Memory Error Detection feature is not functional and does not appear in the system BIOS. You can install any combination of SIMMs as long as you install identical pairs in a bank. You can also mix EDO and FPM SIMMs, as long as you have an identical pair of each per bank. For example, you can install two 16MB EDO SIMMs in Bank 0 and two 8MB FPM SIMMs in Bank 1, but you cannot install one 4MB FPM SIMM and one 8MB FPM SIMM in Bank 0, and two 8MB EDO SIMMs in Bank 1. This is because the two FPM SIMMs do not match (they are not the same size). If you use two SIMMs, put them side by side in either Bank 0 or Bank 1. If you place the SIMMs in Bank 1, however, please note that you will have to remove these SIMMs before you can also populate Bank 0 with SIMMs (the Bank 1 SIMMs are in the way).   To install SIMMs: Insert the SIMM into the socket as shown below. Start the module at about a 45° angle. Gently press the SIMM toward the back of the socket until it snaps underneath the metal clamps.   To remove SIMMs: Gently pull out on the metal socket clamps to release the SIMM from the socket. Tilt the module toward the front of the socket and lift it out gently. Never force the SIMM out of the socket without releasing the clamps. Failure to release the clamps may break the socket, causing damage that is not covered by the warranty. SIMM combinations chart SIMM J18, J19 Bank 0 SIMM J20, J21 Bank 1 Total System Memory 1MB × 36 (4MB) Empty 8MB 1MB × 36 (4MB) 1M × 36 (4MB) 16MB 2MB × 36 (8MB) Empty 16MB 2MB × 36 (8MB) 1MB × 36 (4MB) 24MB 2MB × 36 (8MB) 2MB × 36 (8MB) 32MB 4MB × 36 (16MB) Empty 32MB 4MB × 36 (16MB) 1MB × 36 (4MB) 40MB 4MB × 36 (16MB) 2MB × 36 (8MB) 48MB 4MB × 36 (16MB) 4MB × 36 (16MB) 64MB 8MB × 36 (32MB) Empty 64MB 8MB × 36 (32MB) 1MB × 36 (4MB) 72MB 8MB × 36 (32MB) 2MB × 36 (8MB) 80MB 8MB × 36 (32MB) 4MB × 36 (16MB) 96MB 8MB × 36 (32MB) 8MB × 36 (32MB) 128MB 16MB × 36 (64MB) Empty 128MB 16MB × 36 (64MB) 1MB × 36 (4MB) 136MB 16MB × 36 (64MB) 2MB × 36 (8MB) 144MB 16MB × 36 (64MB) 4MB × 36 (16MB) 16072MB 16MB × 36 (64MB) 8MB × 36 (32MB) 192MB 16MB × 36 (64MB) 16MB × 36 (64MB) 256MB   Enabling USB Software Drivers Your computer shipped with USB ports; however, the Windows 95 drivers for USB have not been loaded. They are available on the Windows 95 CD that shipped with your computer. If you purchase a peripheral that uses USB, you need to load the Windows 95 drivers. In addition, you must load the USB peripheral's drivers according to the device manufacturer's instructions.   To load Windows 95 USB drivers: Turn on your PC. Press <F1> to enter your system setup program. Select the Peripheral Configuration section. Set the USB Interface to Enabled. Save changes and exit the System Setup program. Click Continue and Finish when the New Hardware Detected screen in Windows 95 appears. Place the Windows 95 CD in your CD-ROM drive. The Windows 95 CD starts automatically and the Windows 95 CD-ROM screen appears. Click the Browse icon. A Windows 95 window appears with the folders contained on the CD. Double-click the Drivers, USB, and Enduser folders, then double-click the Usbsupp icon. The following screen appears. Click Yes, and the following screen appears. Note: If the Windows 95 CD is inserted in the CD-ROM drive after the USB drivers are installed, a screen appears stating that your version of Windows 95 is outdated. Your computer is not malfunctioning. To use the Windows 95 CD, you must remove the USB drivers by clicking the Add/Remove icon on the Windows 95 CD screen. However, you will lose USB functionality and the drivers will need to be reinstalled. Click Yes if you agree to the warranty terms. If you click No, the drivers are not installed. When installation is complete, the following screen appears. Click OK. The computer restarts. Install your peripheral drivers according to the manufacturer's instructions.   Notices   All rights reserved This publication is protected by copyright and all rights are reserved. No part of it may be reproduced or transmitted by any means or in any form, without prior consent in writing from Gateway 2000. The information in this manual has been carefully checked and is believed to be accurate. However, Gateway 2000 assumes no responsibility for any inaccuracies that may be contained in this manual. In no event will Gateway 2000 be liable for direct, indirect, special, exemplary, incidental, or consequential damages resulting from any defect or omission in this manual, even if advised of the possibility of such damages. In the interest of continued product development, Gateway 2000 reserves the right to make improvements in this manual and the products it describes at any time, without notice or obligation.   Trademark acknowledgments AnyKey, cow spot motif, CrystalScan, Destination, Field Mouse, Gateway 2000, GW2K, HandBook, TelePath, Vivitron, stylized "G" design, and motto "You’ve got a friend in the business" are registered trademarks and EZ Pad, Family PC, and Gateway Solo are trademarks of Gateway 2000, Inc. Intel, Intel Inside logo, and Pentium are registered trademarks and MMX is a trademark of Intel Corporation. Microsoft, MS, MS-DOS, and Windows are trademarks or registered trademarks of Microsoft Corporation. All other product names mentioned herein are used for identification purposes only, and may be the trademarks or registered trademarks of their respective companies. Copyright © 1997 Gateway 2000, Inc. 610 Gateway Drive, N. Sioux City, SD 57049 USA   Regulatory Compliance Statements American Users: This device has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio or television reception. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio and television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio/TV technician for help. Caution! The Federal Communications Commission warns the users that changes or modifications to the unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Accessories: This equipment has been tested and found to comply with the limits of a Class B digital device. The accessories associated with this equipment are as follows: Shielded video cable Shielded power cord. These accessories are required to be used in order to ensure compliance with FCC rules. Canadian Users: This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus as set out in the radio interference regulations of Industry Canada. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de Classe B prescrites dans le règlement sur le brouillage radioélectrique édicté par Industrie Canada. European Users: This Information Technology Equipment has been tested and found to comply with following European directives: [i] EMC Directive 89/336/EEC amending directive 92/31/EEC & 93/68 EEC as per - EN 50081-1:1992 according to EN 55022:1995 Class B EN 61000-3-2:1995 or EN 60555-2:1986 EN 61000-3-3: 1995 - EN50082-1:1992 according to EN 61000-4-2:1995 or IEC 801-2:1984 ENV 50140:1994 or IEC 801-3:1984 EN 61000-4-4:1988 or IEC 801-4:1998 [ii] Low Voltage Directive (Safety) 73/23/EEC as per EN 60950: 1992 Japanese Users: This equipment is in the Class 2 category (Information Technology Equipment to be used in a residential area or an adjacent area thereto) and conforms to the standards set by the Voluntary Control Council for Interference by Information Technology Equipment aimed at preventing radio interference in such residential area. When used near a radio or TV receiver, it may become the cause of radio interference. Read instructions for correct handling. Australian and New Zealand Users: This device has been tested and found to comply with the limits for a Class B digital device, pursuant to the Australian/New Zealand standard AS/NZS 3548 set out by the Spectrum Management Agency. Caution! Disconnect power before servicing. Attention! Couper le courant avant l’entretien.