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Vig550B Motherboard Manual – Ver 1.0

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Summary of Contents for Vig550B

Page 1: ...C O M P U T E R S N E T W O R K S S O L U T I O N S Vig550B Motherboard Manual ...

Page 2: ...uter system maintains compliance throughout its functional life it is essential you follow these guidelines Install the system according to Viglen s instructions If you open up your Viglen Keep internal cabling in place as supplied Ensure the lid is tightly secured afterwards Do not remove drive bay shields unless installing a CE marked peripheral in its place The clips or bumps around the lips of...

Page 3: ...en consent except for copies retained by the purchaser for backup Copyright 2005 Viglen Limited All Rights Reserved VIG550B Manual Version 1 0 Printed in the United Kingdom Liability No warranty or representation either expressed or implied is made with respect to this documentation its quality performance merchantability or fitness for a particular purpose As a result the documentation is license...

Page 4: ...9 30 Replacing the Clock CMOS RAM Battery 31 Chapter 3 Solving Problems 32 Resetting the System 32 Troubleshooting Procedures 33 Problems Operating Add in Boards 34 Problems Suggestions 35 36 Chapter 4 System BIOS 37 What is the BIOS 37 The Power On Sequence 37 Phoenix BIOS Introduction 38 BIOS Upgrades 38 Using AWDFALSH to Update the BIOS 38 Configuring the Motherboard using BIOS Setup 39 BIOS Se...

Page 5: ...6 PM Wakeup Events 57 PnP PCI Configurations 58 IRQ Resources 59 PC Health Status 60 Frequency Voltage Control 61 Main Menu Additional Options 62 Chapter 5 Technical Information 63 Enhanced IDE 63 Operating Systems and Hard Drives 63 64 Power Supply Connector 65 Useful Connector Information 66 68 Reliability 69 Temperature 69 Chapter 6 Glossary 70 Notes 72 Chapter 7 Suggestions 73 ...

Page 6: ...h are designed to vastly improve both multimedia and communications on your PC The combination of the Intel processor MMX technology and Viglen expertise make this a formidable computer This manual contains technical information about the Viglen VIG550B motherboard and other hardware components inside your computer If you are new to computers we recommend that you read the user guide first If you ...

Page 7: ...nm Pentium 4 Celeron D LGA775 Processors with 800 533 MHz FSB Supports Intel Hyper Threading Technology Socket T 775 connector Main memory Two 184 pin DIMM sockets Supports DDR400 non ECC un buffered memory Supports maximum memory capacity up to 2GB Chipset SiS 661FX 800Hz Front Side Bus FSB AGP 8x Support for 400MHz DDR RAM Advanced System Power Management features Integrated Super I O Controller...

Page 8: ...automatically program the voltage regulator on the motherboard to the required processor voltage In addition the front side bus speed is automatically selected The motherboard currently supports processors that run internally up to 3 6 GHz and have a 128KB 512KB or 1MB second level cache running at full CPU Speed The processor implements MMX technology and maintains full backward compatibility wit...

Page 9: ...28MB Maximum memory size is 2GB The BIOS automatically detects memory type size and speed The motherboard supports the following memory features 184 pin DIMMs 400Mhz Un Buffered Non ECC DIMM RDRAM Synchronous DRAM SDRAM improves memory performance through memory access that is synchronous with the memory clock This simplifies the timing design and increases memory speed because all timing is depen...

Page 10: ...LEDs Two LEDs are built into the RJ 45 LAN connector The following table describes the LED states when the board is powered up and the LAN subsystem is operating Table 1 LAN LED Status LED Colour LED State Condition Green Off 10 Mbit sec data rate is selected Green On 100 Mbit sec date rate is selected Yellow Off LAN link is not established Yellow On steady state LAN link is established Yellow On ...

Page 11: ...oth read and write compatible with 1 44MB and 720KB DOS formatted diskette and is supported by Windows 95 and Windows NT operating system The Vig550B board allows connection of an LS 120 compatible drive and a standard 3 floppy drive The LS 120 drive can be configured as a boot device before a floppy drive if selected in the BIOS setup utility Note If you connect an LS 120 drive to an IDE connecto...

Page 12: ...ler o N82077 compatible o Single diskette drive interface o 16 byte FIFO o High performance digital data separator DDS o PC AT and PS 2 drive mode support Keyboard and mouse controller o Industry standard 8042A compatible o General purpose microcontroller o 8 bit internal data bus ISA Plug and Play compatible register set PCI PME interface Intelligent auto power management o Shadowed write only re...

Page 13: ...lf healing fuse re establishes the connection after an over current condition is removed The keyboard controller supports the hot key sequence Ctrl Alt Del for a software reset This key sequence resets the computer s software by jumping to the beginning of the BIOS code and running the Power On Self Test POST Audio Subsystem The Vig550B board has multiple AC 97 V 1 03 compliant audio features incl...

Page 14: ...he system power after installing a PCI board the BIOS automatically configures interrupts DMA channels I O space and so on Since PCI add in boards use the same interrupt resources as ISA add in boards you must specify the interrupts used by ISA boards in the set up program The PCI auto configuration program complies with version 2 1 of the PCI BIOS specification IDE Auto Configuration If you insta...

Page 15: ...Panel USB Header D USB T Front Panel USB Header E VGA LPT and COM1 U South bridge SiS 964L F PS2 V AUX1 Connector G ATX 4 pin W Front Panel Audio Header H North Bridge SiS 661FX X CD In Connector I 775 Pin CPU Socket Y Audio Codec Chip J CPU Fan Z LAN Controller K Dimm 1 and 2 AA PCI Slots L ATX Power BB AGP Slot M CMOS Battery CC Buzzer Speaker N Jumper 1 DD Floppy Drive Connector O IDE 1 IDE 2 P...

Page 16: ...serial port allows a serial device to be attached such as external modem The VGA port allows a monitor to be attached using the on board graphics hardware F PS 2 keyboard and mouse Allows a PS 2 mouse and keyboard to be attached G 4 Pin ATX power connector Provides additional power to the AGP Slot H North Bridge The SIS 661FX provides the processor interface with 800 533 400 MHz frequency support ...

Page 17: ...Secondary IDE ports This allows up to 2 devices such as CD DVD drives and hard drives to be added to the IDE channel The port is slotted to ensure correct installation P Power Fan Connector This allows the power unit fan to be connected to the motherboard Case dependent Q SATA Connectors Two Ports which can be used for SATA Hard Disk Drives R Front Panel Header This is the panel to which the case ...

Page 18: ...udio panel to be fitted X Internal Audio header Allows the audio from the CD ROM to be run though the internal audio via an analogue cable Y Audio Codec Decodes different audio formats Z LAN controller On board NIC AA PCI slot Allows a PCI device to be fitted such as a fire wire card or wireless card BB AGP slot Allows an AGP device to be fitted such as a graphics card CC Onboard Speaker Buzzer Ou...

Page 19: ...ss to PS 2 keyboard and mouse connectors as well as one serial port one parallel port four USB ports one LAN Port and the audio connectors MIC SPEAKER LINE IN NETWORK USB PRINTER SERIAL1 MONITOR USB Figure 2 Rear I O Shield Note Power to the computer should be turned off before a keyboard or mouse is connected or disconnected PS 2 Keyboard Mouse Ports The purple connector is for a PS 2 keyboard an...

Page 20: ...This Line Out lime jack connects a headphone or a speaker In 6 channel mode the function of this jack becomes Front Speaker Out Microphone Jack This Mic pink jack connects a microphone In 6 channel mode the function of this jack becomes Rear Speaker Out Note The functions of the Line Out Line In and Microphone jacks change when you select the 6 channel audio configuration Table 3 Audio 2 4 or 6 ch...

Page 21: ...ance required for using and modifying electronic equipment Do not operate the system with the cover removed Always replace the cover before turning on the system As the colours of the wires in the mains lead of this computer may not correspond with the coloured markings identifying the terminals in your plug precede as follows The wire which is coloured green and yellow must be connected to the te...

Page 22: ...ocal electrical shop While you are wearing the strap and it is earthed static charge will be harmlessly bled to ground 2 Do not remove the component from its anti static protective packaging until you are about to install it 3 Hold boards by the edges try not to touch components interface strips etc Note We recommend that you return your computer to the service department for upgrading Any work ca...

Page 23: ...vided by the CPU The only jumper present on the motherboard is for clearing all the CMOS settings In the unlikely event of the CMOS becoming corrupted then jumper JP1 can be set to clear the contents of the CMOS CAUTION Never remove jumpers using large pliers as this can damage the pins The best way to remove a jumper is to use a small pair of tweezers or fine needle nosed pliers Never remove a ju...

Page 24: ... Clear CMOS Jumper Settings Function Jumper JP1 Configuration Default 2 3 The BIOS uses current configuration information and passwords for booting Clear 1 2 Turn off the system and unplug the power cord Move the jumper from pins 1 2 default to pins 2 3 for about 5 10 seconds Then move the jumper back to pins 1 2 ...

Page 25: ...icrophone Power 4 AUD_VCC Filtered 5V used by Analog Audio Circuits 5 AUD_F_R Right Channel audio signal to Front Panel 6 AUD_RET_R Right Channel Audio signal to Return from Front Panel 7 REVD Reserved 8 Key No Pin 9 AUD_F_L Left Channel Audio signal to Front Panel 10 AUD_RET_L Left Channel Audio signal to Return from Front Panel CAUTION Do not move the jumper with the power on Always turn off the...

Page 26: ... 0 25 Motherboard Connectors There are connectors on the motherboard for FAN IDE Power supply CD audio Floppy IDE Front Panel Connectors The location and or details of these connections are shown below Figure 4 Motherboard Connectors ...

Page 27: ...nt Panel connectors Hard Disk L E D Connector This goes to the Hard Disk L E D on the front panel which lights up when the IDE Hard Disk is in use Reset switch connector When these pins are shorted it will cause the computer to perform a cold reboot Power L E D This attaches to the power L E D on the front panel to display if the computer is active or not Power On Off When these pins are shorted i...

Page 28: ...instructions below 1 Read the warnings at the start of this chapter and ensure a static free environment 2 Remove the lid from the computer by removing the four screws at the rear of the case 3 Locate the CPU module by referring to Figure 1 if necessary 4 Locate the heat sink clips and remove heat sink and unplug FAN cable 5 Lift arm on Socket to release the CPU 6 Lift the CPU Vertically upwards u...

Page 29: ...4 Make sure the clips at either end of the socket are pushed away from the socket 5 Position the DIMM above the socket Align the two small notches in the bottom edge of the DIMM with the keys in the socket Insert the bottom edge of the DIMM into the socket 6 When the DIMM is seated push down on the top edge of the DIMM until the retaining clips at the ends of the socket snap into place Make sure t...

Page 30: ...ll the drivers and or software applications for the expansion card according to the card documentation Table 7 Standard IRQ Assignment IRQ Priority Standard Function 0 1 System Timer 1 2 Keyboard Controller 2 N A Programmable Interrupt 4 12 Communication Port COM1 5 13 IRQ Holder for PCI steering 6 14 Floppy Disk Controller 7 15 Printer Port LPT1 8 3 System CMOS Real Time Clock 9 4 IRQ Holder for ...

Page 31: ...oard LAN used Onboard Audio used PCI Slots There are three 32 bit PCI slots on this motherboard The slots support PCI cards such as a LAN card SCSI card USB card and other cards that comply with PCI specifications Figure 8 Installing a PCI card AGP Slot This motherboard has an Accelerated Graphics Port AGP slot that supports AGP 8X 3 3V 1 5V cards Note The notches on the card golden fingers to ens...

Page 32: ...ve heat or any naked flame Keep all batteries away from children CAUTION Danger of explosion if the battery is incorrectly replaced Replace only with the same or equivalent type recommended by Viglen Discard used batteries according to manufacturer s instructions The battery is listed as board component E on the diagram on Figure 1 To replace the battery carry out the following 1 Observe the preca...

Page 33: ...lso look for support information on our web site http www viglen co uk Device drivers and various useful utilities can be downloaded from our ftp site ftp ftp viglen co uk Resetting the System Before checking your system for hardware problems it is always a good idea to try resetting your computer and see if a re boot can solve the problem Most software related problems can be solved simply by re ...

Page 34: ... operating system normally loads from a diskette insert the operating system diskette into the drive 5 Turn on the system If the power indicator does not light but the system seems to be operating normally the indicator is probably defective Monitor the power on self test POST execution Each time you turn on the system the POST checks the system board memory keyboard and certain peripheral devices...

Page 35: ...structions Check the documentation that came with the board Are all cables installed properly The following items are suggestions for troubleshooting problems related to PCI ISA legacy non Plug and Play add in boards If the PCI ISA board uses an interrupt run Set up and set the interrupt that is being used by the PCI ISA board to Used by PCI ISA Card Please refer to the BIOS manual for details of ...

Page 36: ...ystem settings available to re enter because clearing CMOS RAM sets the options to their default values Characters on screen are distorted or incorrect Make sure the brightness and contrast controls are properly adjusted on the monitor Make sure the video signal cable and power cables are properly installed Make sure your monitor is compatible with the video mode you have selected Characters do no...

Page 37: ...lly check the connector between the system board and the front panel If OK the light may be defective Prompt doesn t appear after system boots It s probably switched off A serious fault may have occurred consult your dealer service department Technical Support Setup can t enter If you can t enter Setup to make changes check the switch that disables entry into Setup Chapter 2 If the switch is set t...

Page 38: ... On sequence When the computer is first switched on certain instructions in the BIOS are executed to test various parts of the machine This is known as the POST Power On Self Test routine When you switch the computer on or when you press the Reset button or press Ctrl Alt Delete keys which has the same effect you can see on the monitor that it counts through the memory testing it The floppy disk d...

Page 39: ...S displays a message during POST identifying the type of BIOS and the revision code BIOS Upgrades A new version of the BIOS can be upgraded from a diskette using the AFUDOS EXE utility that is available from the Viglen FTP site This utility does BIOS upgrades as follows Updates the flash BIOS from a file on a disk Updates the language section of the BIOS Makes sure that the upgrade BIOS matches th...

Page 40: ... using and modifying electronic equipment Disconnect the computer from its power source and from any telecommunications links networks or modems before performing any of the procedures described in this chapter Failure to disconnect power telecommunications links networks or modems before you open the computer or perform any procedures can result in personal injury or equipment damage Some circuit...

Page 41: ...n the CMOS RAM of the firmware hub The firmware hub on the motherboard stores the Setup utility When you start up the computer the system provides you with the opportunity to run this program Press Delete during the Power On Self Test POST to enter the Setup utility Otherwise POST continues with its test routines If you wish to enter Setup after POST restart the system by pressing Ctrl Alt Delete ...

Page 42: ... For changing the advanced power management APM configuration PnP PCI Configurations For changing IRQ settings PC Health Status Displays information regarding CPU temp and fan speed Frequency Voltage Control For changing the CPU frequency and displaying current frequency information To select an item on the menu bar press the right or left arrow key on the keyboard until the desired item is highli...

Page 43: ...ble you may change the value of the field opposite the item You cannot select an item that is not user configurable A configurable field is enclosed in brackets and is highlighted when selected To change the value of a field select it then press Enter to display a list of options Pop Up Window Select a menu item then press Enter to display a pop up window with the configuration options for that it...

Page 44: ... information Figure 13 Standard CMOS features System Date This item allows you to set the system date xx xx xx System Time This item allows you to set the system time xx xx xx IDE Channel X Master Slave This shows what devices are running of which IDE channel Drive A B 1 44M 3 5 in Sets the type of floppy drive installed Configuration options Disabled 360K 5 25 in 1 2M 5 25 in 720K 3 5 in 1 44M 3 ...

Page 45: ...m determines whether the system stops if an error is detect during system boot up Base Memory This displays the amount of base memory installed on the system typically 640K Extended Memory This displays the amount of extended memory detected during system boot up Total Memory This displays the total amount of memory available in the system ...

Page 46: ...ine your own drive set it to Manual and make sure you fully understand the meaning of the parameters Refer to the manual supplied with the device to get the correct settings Access Mode This item selects the mode to access your IDE device Leave this to its default Auto setting to detect the access mode of your HDD automatically Capacity The approximate size of the disk drive The size is normally s...

Page 47: ...anced BIOS features The Advanced menu items allow you to change the settings for the CPU and other system devices CAUTION Take caution when changing the settings of the Advanced menu items Incorrect field values may cause the system to malfunction Figure 15 Advanced BIOS features Sub Menu CPU Feature This item is used to manage the thermal state for certain CPU Hard Disk Boot Priority Use this opt...

Page 48: ... Enabled and the system is booting from the floppy drive the system will boot from drive B instead of the regular drive A There must be two floppy drives connected in the system to use this function Boot Up Floppy Seek When set to Enabled the BIOS will check whether the floppy disk drive is installed or not Boot Up NumLock Status This item determines the default state of the numeric keypad at syst...

Page 49: ...ows access to memory greater then 64MB when using OS 2 Leave this item to its default setting when using any other operating system Disable Unused PCI Clock This option disables the clock of a PCI slot that is not in use Yes The system automatically detects the unused DIMM and PCI slot and stops sending the clock signal to them No The clock signal is sent to all PCI slots Advanced Chipset Features...

Page 50: ...rol Memory Timing Allows the used to select the CAS latency time in HCLKs of 2 2 5 or 3 The value is set a the factory depending on the DRAM installed DO NOT change the values in this field unless you have changed the DRAM or CPU AGP P2P Bridge Control Figure 18 AGP P2P Bridge Control ...

Page 51: ...upport AGP Data Rate Capability This allows the user to control the AGP card data transfer rate On Chip AGP Control Figure 19 On Chip AGP Control VGA Share Memory Size This shows the amount of memory borrowed from the main memory for use with the VGA In the case above the memory being used for the VGA is 64MB this also means that 64MB will be lost from the main memory System BIOS Cacheable This al...

Page 52: ...RAM to be cached in the memory for faster execution Enable for better performance Integrated Peripherals Figure 20 Integrated Peripherals Init Display First This specifies whether your graphics card in installed in one of the PCI slots or is integrated on the motherboard On Chip IDE Device ...

Page 53: ...ble the internal PCI IDE channel IDE Bus Master Used to enable or disable the IDE bus mastering under DOS IDE Burst Mode When enabled every write instruction sent by the system will be sent to the write buffer Burst able transactions then burst on the PCI bus in one go and non burst able transactions do not ...

Page 54: ...bles USB 2 0 support on your computer USB Keyboard Support via This allows a USB keyboard to be used in a DOS environment by selecting BIOS or in the OS by selecting OS USB Mouse Support via This allows a USB mouse to be used in a DOS environment by selecting BIOS or in the OS by selecting OS Audio Controller This allows you to control the onboard AC97 audio Disable this item if you are going to i...

Page 55: ...e Onboard FDD Controller This enables the onboard floppy disk drive controller Onboard Serial Port 1 This assigns the I O address and interrupt request IRQ for the onboard serial port1 COM1 Onboard Parallel Port This assigns the I O address and interrupt request IRQ for the onboard parallel port ...

Page 56: ...SPP Output Only ECP EPP Bi directional allows both input and output Only supported by ECP and EPP award peripherals ECP Mode Use DMA When the parallel port is set to ECP mode the port can use either DMA 3 or DMA 1 Onboard PCI Device Figure 24 Onboard PCI Device Onboard LAN Device Enables and disables the onboard LAN LAN Boot ROM Enables and disables booting from the onboard LAN or a network add in...

Page 57: ...and Power management Interface you can create a software power down A software power down allows the system to resume from Wake Up Alarms This is controlled by the power button If set to Instant Off the system powers off straight away If set to Delay 4 sec the power button has to be held for 4 seconds before shutting down Restore On AC Power Loss Selects the action the system takes after a AC powe...

Page 58: ...ignal is received from a specific hardware peripheral or component USB Resume from S3 Allows a USB device to wake the system from S3 PS2KB Wakeup from S3 Allows a PS 2 keyboard to wake the system by either a hot key combination or any key that is pressed The default is Any Key PS2MS Wakeup from S3 Allows a PS 2 mouse to wake the system by either just movement or movement and a click The default is...

Page 59: ...led next time you boot up the ESCD is cleared and the BIOS resets the settings for the plug play PCI card The following boot up this will be reset to disable Note The ESCD Extended System Configuration Data contains the IRQ DMA I O port and memory information of the system This is a specification and feature of the Plug Play BIOS ...

Page 60: ... Configurations PCI VGA Palette Snoop This determines whether the MPEG ISA VESA VGA cards can work with PCI VGA or not Enable MPEG ISA VESA VGA card work with PCI VGA Disable MPEG ISA VESA VGA card do not work with PCI VGA PIRQ_0 Use No PIRQ_7 Use IRQ No This allows IRQ numbers to be specified manually or automatically for installed PCI devices ...

Page 61: ...erature This item allows a temperature to be set at which the system will shut down automatically to prevent over heating All Voltages Fans Speed and Thermal Monitoring These are unchangeable as they give the current statues of the CPU environment temperatures fan speeds and the system power voltage ...

Page 62: ...cy Voltage Control CPU Clock ratio Allows the CPU clock ratio to be changed if it isn t locked Spread Spectrum If enabled could reduce the EMI Electro Magnetic Interference generated by the system Clock Control By Allows control over Async CPU Frequency DRAM Ratio and DRAM frequency ...

Page 63: ...minimal system operation Set Password Allows a password to be set to restrict access to the BIOS configuration Save Exit Setup Allows the settings that have been changed to be saved and exits the BIOS setup menu This also reboots the machine Exit Without Saving Exits the BIOS setup menu without saving any setting that have been changed This also reboots the machine ...

Page 64: ...edia applications requiring vast amounts of information even faster transfers rates were needed Now drives with Enhanced IDE controllers can deliver up to 13MB sec which is in the region of SCSI 2 performance Dual IDE channels have now been added which allows up to four IDE drives to be supported by the system Each channel supporting two IDE devices Non disk IDE peripherals have been developed IDE...

Page 65: ... support LBA ECHS or standard CHS methods Note that LBA support may require a switch setting on an OS 2 driver in order to operate in that mode OS 2 2 0 Novel NetWare can support either ECHS or standard CHS methods In order to use LBA with NetWare a driver that supports current parameters must be used OS 2 2 0 does not support LBA DOS Windows can use LBA ECHS or standard CHS methods The 32 bit Dis...

Page 66: ...he correct APM command from the operating system the BIOS turns off power to the computer With soft off enabled if power to the computer is interrupted by a power outage or a disconnected power cord when power resumes the computer returns to the power state it was in before power was interrupted on or off Table 12 Power Supply Connector Pin Signal Name 1 3 3 V 2 3 3 V 3 Ground 4 5 V 5 Ground 6 5 V...

Page 67: ...0 USBP1 3 USBP0 USBP1 4 Ground Table 15 Serial Port Connectors Pin Signal Name 1 DCD 2 Serial In 3 Serial Out 4 DTR 5 Ground 6 DSR 7 RTS 8 CTS 9 RI Table 16 Audio Line Out Connector Pin Signal Name Sleeve Ground Tip Audio Left Out Ring Audio Right Out Table 17 Audio Line In Connector Pin Signal Name Sleeve Ground Tip Audio Left In Ring Audio Right In Table 18 Audio Mic In Connector Pin Signal Name...

Page 68: ...RSNT1 A40 5 V SDONE B40 PERR A10 5 V I O B10 Reserved A41 5 V SBO B41 3 3 V A11 Reserved B11 no connect PRSNT2 A42 Ground B42 SERR A12 Ground B12 Ground A43 PAR B43 3 3 V A13 Ground B13 Ground A44 AD15 B44 C BE1 A14 3 3 V aux B14 Reserved A45 3 3 V B45 AD14 A15 RST B15 Ground A46 AD13 B46 Ground A16 5 V I O B16 CLK A47 AD11 B47 AD12 A17 GNT B17 Ground A48 Ground B48 AD10 A18 Ground B18 REQ A49 AD0...

Page 69: ...nual Ver 1 0 68 Table 21 Front Panel USB Pin Pin Assignment Pin Pin Assignment 1 VCC 2 VCC 3 Data0 4 Data1 5 Data0 6 Data1 7 Ground 8 Ground 9 NC 10 NC Table 22 Internal Speaker Pin Pin Assignment 1 Signal 2 NC 3 Ground 4 5V ...

Page 70: ...R NWT 000332 Issue 4 and September 1991 The MTBF prediction is for Redesigning the motherboard for alternate components if failure rates exceed reliability expectations Estimating repair rates and spare parts requirements MTBF data is calculated from predicted data 55 C The MTBF prediction for the motherboard is 112 977 7547 hours Temperature Table 23 Temperature Temperature Specification Non oper...

Page 71: ...s used by application software to control some special features Each graphics board and printer requires its own driver D Type A common type of connector used for connecting printers serial ports game port and many other types of interface DRAM Dynamic Ram used for main system memory providing a moderately fast but cheap storage solution FDC Floppy Disk Controller the interface for connecting flop...

Page 72: ...nvented It is a high speed data bus that carries information to and from components known as Local Bus RAM Random Access Memory the memory used by the computer for running programs and storing data ROM Read Only Memory a memory chip which doesn t lose its data when the system is switched off It is used to store the System BIOS and VGA BIOS instructions It is slower than RAM Shadow Memory The BIOS ...

Page 73: ...Vig550B Motherboard Manual Ver 1 0 72 Notes ...

Page 74: ...len has listed some questions that you may like to answer and return to Viglen This will help Viglen help to keep and improve the standard of their manuals 1 Is the information provided in this and other manuals clear enough 2 What could be added to the manual to improve it 3 Does the manual go into enough detail 4 Would you like an on line version of this manual ...

Page 75: ...hnical support and Service Departments 6 Are there any technological improvements that could be made to the system 7 Other points you would like to mention Please return this slip to Product Development Dept Viglen Ltd Viglen House Alperton Lane Alperton Middlesex HA0 IDX ...

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