R MES-VM Socket 370 microATX Motherboard USER’S MANUAL
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CONTENTS I. INTRODUCTION .............................................................................. 7 How this manual is organized ............................................................. 7 Item Checklist ..................................................................................... 7 II. FEATURES ....................................................................................... 8 The ASUS MES-VM Motherboard ....................................................
CONTENTS Power Menu ...................................................................................... 51 Power (sub-menu 1/2) ................................................................. 53 Power (sub-menu 2/2) ................................................................. 54 Boot Menu ........................................................................................ 55 Exit Menu ......................................................................................... 57 V. APPENDIX .....
FCC & DOC COMPLIANCE Federal Communications Commission Statement This device complies with FCC Rules Part 15. Operation is subject to the following two conditions: • • This device may not cause harmful interference, and This device must accept any interference received, including interference that may cause undesired operation. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
I. INTRODUCTION I. INTRODUCTION Sections/Checklist How this manual is organized This manual is divided into the following sections: I. II. III. IV. V. Introduction Features Hardware Setup BIOS Setup Appendix Manual information and checklist Information and specifications concerning this product Instructions on setting up the motherboard Instructions on setting up the BIOS software Optional items and general reference Item Checklist Check that your package is complete.
II. FEATURES The ASUS MES-VM Motherboard II. FEATURES Features The ASUS MES-VM motherboard is carefully designed for the demanding PC user who wants many intelligent features in a small package. • Intel Processor Support: Supports Intel’s Celeron processor designed for the Socket 370 and packaged in Plastic Pin Grid Array (PPGA). • SiS Chipset: Features 100MHz FSB SiS’ 620 chipset with SiS 6326 AGP 2X graphics built-in and support for ATA-66 which allows 66MHz IDE transfers.
II. FEATURES Introduction to ASUS Smart Series Motherboards ASUS MES-VM User’s Manual II. FEATURES Smart Series Performance • ATA-66 & Ultra DMA/33: Comes with an onboard PCI Bus Master IDE controller with two connectors that support four IDE devices in two channels. Supports ATA-66, Ultra DMA/33, PIO Modes 3 & 4 and Bus Master IDE DMA Mode 2, and supports Enhanced IDE devices, such as Tape Backup, CD-ROM, CD-R/RW, and LS-120 drives.
II. FEATURES II. FEATURES Smart Series Intelligence • Fan Status Monitoring and Alarm: To prevent system overheat and system damage, the CPU, power supply, and system fans can be monitored for RPM and failure. All the fans are set for its normal RPM range and alarm thresholds. • Temperature Monitoring and Alert: To prevent system overheat and system damage, this motherboard supports Socket 370 processor thermal sensing.
II. FEATURES Parts of the ASUS MES-VM Motherboard 2 DIMM Sockets Socket 370 SiS 620 AGPset with AGP 2X VGA 8MB onboard VGA Memory (optional) IDE/Floppy Connectors II.
III. HARDWARE SETUP ASUS MES-VM Motherboard Layout GAME_AUDIO III.
Motherboard Settings 1) VEN_DIS/AUDIOEN 2) FS0, FS1, FS2, FS3 3) BF0, BF1, BF2, BF3 p. 14 Video & Audio Settings (Enable/Disable) p. 15 CPU External Clock (BUS) Frequency Selector p. 15 CPU:BUS Frequency Multiple Expansion Slots 1) DIMM1, DIMM2 2) Socket 370 3) SLOT1 4) PCI1, PCI2, PCI3 p. 16 168-Pin DIMM Memory Support p. 18 Central Processing Unit (CPU) Socket p. 19 16-bit ISA Bus Expansion Slots* p.
III. HARDWARE SETUP Hardware Setup Steps Before using your computer, you must complete the following steps: 1. 2. 3. 4. 5. 6. Check Motherboard Settings Install Memory Modules Install the Central Processing Unit (CPU) Install Expansion Cards Connect Ribbon Cables, Panel Wires, and Power Supply Setup the BIOS Software 1. Motherboard Settings III.
III. HARDWARE SETUP FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 66MHz 66MHz 33MHz 75MHz 75MHz 30MHz 83MHz 83MHz 33MHz 95MHz 95MHz 31MHz 100MHz 100MHz 33MHz 112MHz 112MHz 37MHz 133MHz 133MHz 33MHz FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 FS0 FS1 FS2 FS3 3 2 1 CPU RAM PCI FS0 FS1 FS2 FS3 2.
III. HARDWARE SETUP 2. System Memory (DIMM) NOTE: No hardware or BIOS setup is required after adding or removing memory. This motherboard uses only Dual Inline Memory Modules (DIMMs). Sockets are available for 3.3Volt (power level) unbuffered Synchronous Dynamic Random Access Memory (SDRAM) of either 8, 16, 32, 64, 128MB, or 256MB. The SiS chipset does not support ECC function. ECC memory modules may be used but the ECC function will not be available.
III. HARDWARE SETUP DIMM Memory Installation Insert the module(s) as shown. Because the number of pins are different on either side of the breaks, the module will only fit in the orientation as shown. DIMM modules are longer and have different pin contact on each side and therefore have a higher pin density. SIMM modules have the same pin contact on both sides. 1 Lock 2 Lock III.
III. HARDWARE SETUP 3. Central Processing Unit (CPU) The motherboard provides a ZIF Socket 370. The CPU that came with the motherboard should have a fan attached to it to prevent overheating. If this is not the case then purchase a fan before you turn on your system. WARNING! Be sure that there is sufficient air circulation across the processor’s heatsink by regularly checking that your CPU fan is working.
III. HARDWARE SETUP 4. Expansion Cards WARNING! Make sure that you unplug your power supply when adding or removing expansion cards or other system components. Failure to do so may cause severe damage to both your motherboard and expansion cards. Expansion Card Installation Procedure III. H/W SETUP Expansion Cards 1. Read the documentation for your expansion card and make any necessary hardware or software settings for your expansion card, such as jumpers. 2.
III. HARDWARE SETUP To simplify this process this motherboard has complied with the Plug and Play (PNP) specification which was developed to allow automatic system configuration whenever a PNP-compliant card is added to the system. For PNP cards, IRQs are assigned automatically from those available. If the system has both Legacy and PNP ISA cards installed, IRQs are assigned to PNP cards from those not used by Legacy cards.
III. HARDWARE SETUP 5. External Connectors WARNING! Some pins are used for connectors or power sources. These are clearly distinguished from jumpers in the Motherboard Layout. Placing jumper caps over these connector pins will cause damage to your motherboard. IMPORTANT: Ribbon cables should always be connected with the red stripe on the Pin 1 side of the connector. The four corners of the connectors are labeled on the motherboard.
III. HARDWARE SETUP 3. Universal Serial BUS Ports 1 & 2 (Two 4-pin USB) Two USB ports are available for connecting USB devices. USB 1 Universal Serial Bus (USB) 2 4. Parallel Port Connector (25-pin PRINTER) You can enable the parallel port and choose the IRQ through “Onboard Parallel Port” in Chipset Features Setup of BIOS SETUP. NOTE: Serial printers must be connected to the serial port. Parallel (Printer) Port (25-pin Female) III. H/W SETUP Connectors 5.
III. HARDWARE SETUP 7. Joystick/Midi Connector (15-pin GAME_AUDIO) You may connect game joysticks or game pads to this connector for playing games. Connect MIDI devices for playing or editing audio. Joystick/Midi (15-pin Female) III. H/W SETUP Connectors 8. Audio Port Connectors (Three 1/8” GAME_AUDIO) Line Out can be connected to headphones or preferably powered speakers. Line In allows tape players or other audio sources to be recorded by your computer or played through the Line Out.
III. HARDWARE SETUP 10. Primary / Secondary IDE Connectors (Two 40-1pin IDE) These connectors support the provided IDE hard disk ribbon cable. After connecting the single end to the board, connect the two plugs at the other end to your hard disk(s). If you install two hard disks, you must configure the second drive to Slave mode by setting its jumper accordingly. Please refer to the documentation of your hard disk for the jumper settings.
III. HARDWARE SETUP 12. Wake-On-LAN Connector (3-pin WOL_CON) These connector connects to LAN cards with a Wake-On-LAN output, such as the ASUS PCI-L101 (see section on ASUS LAN Card). The connector powers up the system when a wakeup packet or signal is received through the LAN card. IMPORTANT: This feature requires that the WAKE On LAN Power Up Control is set to Enabled (see “Power Management Setup” under BIOS SETUP) and that your system has an ATX power supply with at least 720mA +5V standby power.
III. HARDWARE SETUP 14. IrDA-Compliant infrared module connector (5-pin IR) This connector supports the optional wireless transmitting and receiving infrared module. This module mounts to a small opening on system cases that support this feature. You must also configure the setting through “UART2 Use Infrared” in Chipset Features Setup to select whether UART2 is directed for use with COM2 or IrDA.
III. HARDWARE SETUP 16. System Management Interrupt Lead (2-pin SMI) This allows the user to manually place the system into a suspend mode or “Green” mode where system activity is decreased to save electricity and expand the life of certain components when the system is not in use. This 2-pin connector connects to the case-mounted suspend switch. If you do not have a switch for the connector, you may use the “Turbo Switch”.
III. HARDWARE SETUP 23. Chassis, CPU , & Power Supply Fan Connectors (3-pin CHA_, CPU_, PWR_FAN) These connectors support cooling fans of 500mAMP (6 Watts) or less. Orientate the fans so that the heat sink fins allow airflow to go across the onboard heat sink(s) instead of the expansion slots. Depending on the fan manufacturer, the wiring and plug may be different. The red wire should be positive, while the black should be ground.
III. HARDWARE SETUP Power Connection Procedures 1. After all connections are made, close the system case cover. 2. Be sure that all switches are off (in some systems, marked with ). 3. Connect the power supply cord into the power supply located on the back of your system case according to your system user’s manual. 4. Connect the power cord into a power outlet that is equipped with a surge protector. III. H/W SETUP Power Connections 5. You may then turn on your devices in the following order: a.
IV. BIOS SETUP Flash Memory Writer Utility AFLASH.EXE: This is the Flash Memory Writer utility that updates the BIOS by uploading a new BIOS file to the programmable flash ROM chip on the motherboard. To determine the BIOS version of your motherboard, check the last four numbers of the code displayed on the upper left-hand corner of your screen during bootup. Larger numbers represent a newer BIOS file. This file works only in DOS mode.
IV. BIOS SETUP 2. Update BIOS Including Boot Block and ESCD This option updates the boot block, the baseboard BIOS, and the ACPI extended system configuration data (ESCD) parameter block from a new BIOS file. See the next page for procedures on downloading an updated BIOS file. To update your current BIOS, type [2] at the Main Menu and then press . The Update BIOS Including Boot Block and ESCD screen appears. Type the filename of your new BIOS and the path, for example, A:\XXX-XX.
IV. BIOS SETUP Managing and Updating Your Motherboard’s BIOS Upon First Use of the Computer System 1. Create a bootable system floppy disk by typing [FORMAT A:/S] from the DOS prompt without creating “AUTOEXEC.BAT” and “CONFIG.SYS” files. 2. Copy AFLASH.EXE to the just created boot disk. 3. Run AFLASH.EXE from this new disk and select option 1. Save Current BIOS to File. See 1. Save Current BIOS To File on the previous page for more details and the rest of the steps.
IV. BIOS SETUP 6. BIOS Setup Program This motherboard supports a programmable EEPROM which can be updated using the provided AFlash Memory Writer utility as described previously in this section. If you are installing the motherboard, reconfiguring your system or you receive a “Run Setup” message, you will need to enter new setup information. This section describes how to configure your system using this utility.
IV. BIOS SETUP BIOS Menu Bar The top of the screen has a menu bar with the following selections: MAIN Use this menu to make changes to the basic system configuration. ADVANCED Use this menu to enable and make changes to the advanced features. Use this menu to set a password to control bootup and control access to the BIOS setup menu. POWER Use this menu to configure and enable Power Management features. BOOT Use this menu to configure the default system device used to locate and load the Operating System.
IV. BIOS SETUP General Help In addition to the Item Specific Help window, the BIOS setup program also provides a General Help screen. This screen can be called up from any menu by simply pressing [F1] or the [Alt] + [H] combination. The General Help screen lists the legend keys with their corresponding alternates and functions. Saving Changes and Exiting the Setup Program Refer to the Exit Menu Section of this Section for detailed information on saving changes and exiting the setup program.
IV. BIOS SETUP Main Menu When the Setup program is accessed, the following screen appears: IV. BIOS SETUP Menu Item Details System Time: [XX:XX:XX] Sets your system to the time that you specify (usually the current time). The format is hour, minute, second. Follow the hour, minute and second format. Valid values for hour, minute and second are: (Hour: (00 to 23), Minute: (00 to 59), Second: (00 to 59). Use the [Tab] or [Shift] + [Tab] keys to move between the hour, minute, and second fields.
IV. BIOS SETUP Video: [EGA/VGA] This field allows setting of display type. Use MONO for black and white monitors, otherwise use the EGA/VGA setting. The configuration options are: [EGA/VGA] [MONO]. Primary Master/Slave & Secondary Master/Slave IV. BIOS SETUP Menu Item Details These fields are used to configure IDE devices. The arrow head icon indicates that this field contains a sub-menu.
IV. BIOS SETUP [None] - to disable IDE devices [Auto] - to automatically detect IDE hard disk drives This will enable auto detection of your IDE hard disk during bootup. This will allow you to change your hard disks (with the power off) and then power on without having to reconfigure your hard disk type. If you use older hard disks that do not support this feature, then you must configure the hard disk in the standard method as described earlier by the “User” option.
IV. BIOS SETUP [User Type HDD] Sector: This field configures the number of sectors per track. Refer to your drive documentation to determine the correct value to enter into this field. NOTE: To make changes to this field, the Type field must be set to User Type HDD. [User Type HDD] CHS Capacity: This field shows the drive’s maximum CHS capacity calculated automatically by the BIOS from the drive information you entered.
IV. BIOS SETUP Other options for “Type:” are: [CD-ROM] - for IDE CD-ROM drives [LS-120] - for LS-120 compatible floppy disk drives [ZIP-100] - for ZIP-100 compatible disk drives [MO] - for IDE magneto optical disk drives [Other ATAPI Device] - for IDE devices not listed here After using the legend keys to make your selections on this sub-menu, press the [Esc] key to exit back to the Main menu.
IV. BIOS SETUP Forgot the password? If you forgot the password, you can clear the password by erasing the CMOS Real Time Clock (RTC) RAM. The RAM data containing the password information is powered by the onboard button cell battery. To erase the RTC RAM: (1) Unplug your computer, (2) Short the solder points, (3) Turn ON your computer, (4) Hold down during bootup and enter BIOS setup to re-enter user preferences.
IV. BIOS SETUP Advanced (main menu) CPU Level 1 Cache / CPU Level 2 Cache: [Enabled] These fields allow you to choose from the default of Enabled or choose Disabled to turn on or off the CPU’s Level 1 and Level 2 built-in cache. CPU Level 2 Cache ECC Check: [Disabled] This function controls the ECC check capability in the CPU level 2 cache. IV. BIOS SETUP Menu Item Details BIOS Update: [Enabled] This functions as an update loader integrated into the BIOS to supply the processor with the required data.
IV. BIOS SETUP Chip Configuration (sub-menu item) I/O Device Configuration (sub-menu item) PCI Configuration (sub-menu item) Shadow Configuration (sub-menu item) Advanced (sub-menu 1/4) IV. BIOS SETUP Menu Item Details (scroll down to see more items, as shown here) Chip Configuration SDRAM Configuration: [By SPD] This sets the optimal timings of settings for items 2–5, depending on the memory modules that you are using.
IV. BIOS SETUP Refresh RAS Assertion: [5T] (Leave on default setting.) Refresh Queue Depth: [12] The configuration options are: [0] [4] [8] [12]. VGA Shared Memory Size: [8MB] You can choose the amount of user-installed DIMM memory to allocate to the onboard VGA. This option is relevant only to motherboards with onboard VGA with no VGA memory onboard. The configuration options are: [2MB] [4MB] [8MB]. IV.
IV. BIOS SETUP Advanced (sub-menu 2/4) I/O Device Configuration IV. BIOS SETUP Menu Item Details Onboard FDC Controller: [Enabled] When Enabled, this field allows you to connect your floppy disk drives to the onboard floppy disk drive connector instead of a separate controller card. If you want to use a different controller card to connect the floppy disk drives, set this field to Disabled. The configuration options are: [Disabled] [Enabled].
IV. BIOS SETUP Onboard Parallel Port: [378H/IRQ7] This field sets the address of the onboard parallel port connector. If you install an I/O card with a parallel port, ensure that there is no conflict in the address assignments. The PC can support up to three parallel ports as long as there are no conflicts for each port. The configuration options are: [Disabled] [3BCH/IRQ 7] [378H/IRQ 7] [278H/IRQ 5].
IV. BIOS SETUP Advanced (sub-menu 3/4) PCI Configuration IV. BIOS SETUP Menu Item Details Slot X IRQ: [Auto] Your motherboard may have between 2 and 5 PCI slots depending on the chipset. Each PCI must have a unique IRQ number to operate. The configuration options are: [Auto] [NA] [3] [4] [7] [9] [10] [11] [12] [14] [15]. Make sure you do not choose an IRQ number used by another device.
IV. BIOS SETUP USB IRQ: [Enabled] Enabled reserves an IRQ# for the USB to work, Disabled does not allow the USB to have an IRQ# and therefore prevents the USB from functioning. If you are not using any USB devices, you may set this feature to Disabled to save an extra IRQ# for expansion cards. The configuration options are: [Auto] [NA] [3] [4] [7] [9] [10] [11] [12] [14] [15]. Make sure you do not choose an IRQ number used by another device.
IV. BIOS SETUP Advanced (sub-menu 3/4-2/3) PCI/PNP ISA DMA Resource Exclusion ASUS MES-VM User’s Manual IV. BIOS SETUP Menu Item Details DMA x Used By ISA: [No/ICU] These fields indicate whether or not the displayed DMA channel for each field is being used by a legacy (non-PnP) ISA card. Available options include: No/ICU and Yes. The first option, the default setting, indicates either that the displayed DMA channel is not used or an ICU is being used to determine if an ISA card is using that channel.
IV. BIOS SETUP Advanced (sub-menu 4/4) Shadow Configuration Video ROM BIOS Shadow: [Enabled] This field allows you to change the video BIOS location from ROM to RAM. Relocating to RAM enhances system performance, as information access is faster than the ROM. The configuration options are: [Disabled] [Enabled]. IV. BIOS SETUP Menu Item Details C8000-CBFFF to DC000-DFFFF: [Disabled] These fields are used for shadowing other expansion card ROMs.
IV. BIOS SETUP Power Menu The “Power Management Setup” option allows you to reduce power consumption. This feature turns off the video display and shuts down the hard disk after a period of inactivity. IV. BIOS SETUP Menu Item Details Power Management: [User Define] This option must be enabled to use any of the automatic power saving features. If this menu item is set to Disabled, power management features will not function regardless of other field settings on this menu.
IV. BIOS SETUP Video Off Option: [Susp,Stby -> Off ] This field determines when to activate the video off feature for monitor power management. The configuration options are: [Always On] [Suspend -> Off] [Susp,Stby -> Off] [All Modes -> Off]. Video Off Method: [DPMS OFF] This field defines the video off features. The following options are available: DPMS OFF, DPMS Reduce ON, Blank Screen, V/H SYNC+Blank, DPMS Standby, and DPMS Suspend.
IV. BIOS SETUP Power (sub-menu 1/2) Power Up Control IV. BIOS SETUP Menu Item Details AC PWR Loss Restart: [Disabled] This allows you to set whether you want your system to boot up after the power has been interrupted. Disabled leaves your system off after reapplying power and Enabled boots up your system after reapplying power. The configuration options are: [Disabled] [Enabled].
IV. BIOS SETUP Power (sub-menu 2/2) Hardware Monitor CPU Temperature: [xxxC/xxxF] The onboard hardware monitor is able to detect the CPU and MB (motherboard) temperatures. Set to [Ignore] only if necessary. IV. BIOS SETUP Menu Item Details CPU Fan Speed: [xxxxRPM] The onboard hardware monitor is able to detect the Chassis Fan Speed, CPU Fan Speed, and the Power Supply Fan Speed in Rotations Per Minute (RPM). The presence of this fan is automatically detected. VCORE Voltage:/+3.
IV. BIOS SETUP Boot Menu Boot Sequence IV. BIOS SETUP Menu Item Details The Boot menu allows you to select among the three possible boot devices listed using the up and down arrow keys . By using the [+] or [Space] keys, you can promote devices and by using the [-] key, you can demote devices. Promotion or demotion of devices alters the priority which the system uses to search for a boot device on system power up.
IV. BIOS SETUP Boot Virus Detection: [Enabled] The configuration options are: [Disabled] [Enabled]. Quick Power On Self Test: [Enabled] The configuration options are: [Disabled] [Enabled]. Boot Up Floppy Seek: [Enabled] The configuration options are: [Disabled] [Enabled]. Boot Up NumLock Status: [On] The configuration options are: [Off] [On]. Full Screen Logo: [Enabled] The configuration options are: [Disabled] [Enabled]. IV.
IV. BIOS SETUP Exit Menu Once you have made all of your selections from the various menus in the Setup program, you should save your changes and exit Setup. Select Exit from the menu bar to display the following menu: IV. BIOS SETUP Menu Item Details NOTE! Pressing the [Esc] key does not exit this menu. You must select one of the options from this menu or a menu bar item to exit this menu.
IV. BIOS SETUP Load Setup Defaults This option allows you to load the default values for each of the parameters on the Setup menus. When this option is selected or if [F9] is pressed, a confirmation is requested. Select Yes to load default values. You can now select Exit Saving Changes or make other changes before saving the values to the non-volatile RAM. Discard Changes This option allows you to discard the selections you made and restore the values you previously saved.
V. APPENDIX V. APPENDIX ASUS LAN Card The ASUS PCI-L101 Fast Ethernet Card LEDs LAN Activity Output Signal Intel Chipset RJ45 Wake on LAN Output Signal ASUS Motherboard type Other If you are using the ASUS PCI-L101 on an ASUS motherboard, leave the jumper on its defaut setting of “ASUS.” If you are using another brand of motherboard, set the jumper to “Other.” Connect the Wake on LAN (WOL) output signal to the motherboard’s WOL_CON in order to utilize the wake on LAN feature of the motherboard.
V. APPENDIX Features V. APPENDIX ASUS LAN Card • • • • • • • • • • • • Intel 82558 Ethernet LAN Controller (Fully integrated 10BASE-T/100BASE-TX) Wake-On-LAN Remote Control Function Supported PCI Bus Master Complies to PCI Local Bus Rev. 2.1 specifications Consists of MAC & PHY (10/100Mbps) interfaces Complies to IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX interfaces Fully supports 10BASE-T & 100BASE-TX operations through a single RJ45 port Supports 32-bit Bus Master Technology / PCI Rev. 2.
V. APPENDIX V. APPENDIX Glossary Glossary AGP (Accelerated Graphics Port) An interface specification that enables high-performance 3D graphics on mainstream PCs. AGP offers a higher throughput than PCI by providing the graphics controller with direct access to system memory. Bus Bus Frequency PCI AGP 1X AGP 2X AGP 4X 33MHz 66MHz 133MHz 266MHz Bus Speed 133MB/s 200-300MB/s 528MB/s 1 GB/s AUTOEXEC.BAT AUTOEXEC.
V. APPENDIX V. APPENDIX Glossary Byte (Binary Term) One byte is a group of eight contiguous bits. A byte is used to represent a single alphanumeric character, punctuation mark, or other symbol. COM Port COM is a logical device name used by to designate the computer serial ports. Pointing devices, modems, and infrared modules can be connected to COM ports. Each COM port is configured to use a different IRQ and address assignment.
V. APPENDIX V. APPENDIX Glossary PCI Bus (Peripheral Component Interconnect Local Bus) PCI bus is a specification that defines a 32-bit data bus interface. PCI is a standard widely used by expansion card manufacturers. Peripherals Peripherals are devices attached to the computer via I/O ports. Peripheral devices allow your computer to perform an almost limitless variety of specialized tasks.
V. APPENDIX V. APPENDIX Glossary USB (Universal Serial Bus) A new 4-pin serial peripheral bus that allows plug and play computer peripherals such as keyboard, mouse, joystick, scanner, printer and modem/ISDN to be automatically configured when they are attached physically without having to install drivers or reboot. With USB, the traditional complex cables from back panel of your PC can be eliminated.
