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Appendix AT Commands

Modem Response Messages

Modem Response Messages

In response to AT modem commands, the modem returns status information in the form of response messages. These
messages appear on the screen when you enter a modem command and press Enter. You can instruct the modem to
return responses in English language words (with the

V1

command) or as numeric values (with the

V0

command).

The most common responses are described in the table below (the numeric equivalents are in parentheses).

Message

Description

(00) OK

The command was carried out successfully.

(01) CONNECT

For

X0

: the modem has made a data connection.

(02) RING

Modem is receiving incoming call.

(03) NO CARRIER

The remote carrier signal is not detected.

(04) ERROR

You typed an invalid command line or a command line that is too long.

(05) CONNECT
1200

Modem is configured to report line speed, which is 1200 bps; or modem is configured to report the DTE
speed, which is 1200 bps.

(06) NO DIAL
TONE

The modem cannot dial the number you specified because there is no dial tone (this response is enabled
when the

X2

,

X4

, or

W

modifier is in effect).

(07) BUSY

Modem has not detected a busy signal (this response is enabled when

X3

or

X4

are in effect).

(08) NO ANSWER

Modem did not detect silence when dialing a command line containing the @ modifier within the time
specified by register

S7

.

(09) CONNECT
0600

Modem is configured to report line speed, which is 600 bps; or modem is configured to report the DTE
speed, which is 600 bps (this response is disabled when

X0

is in effect).

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Содержание Brio 8300

Страница 1: ...Online Reference Guide Online Guide Date Spring1998 HP PC ...

Страница 2: ...he toolbar to go to the next page in the guide Click the Previous Page button in the toolbar to go to the previous page in the guide Click the First Page button in the toolbar to go to the opening screen of the guide Click a bookmark name to the left of the screen to go to the topic corresponding to that bookmark Click the small triangle to the left of the bookmark to hide or show more bookmarks a...

Страница 3: ... in connection with the furnishing performance or use of this material This document contains proprietary information that is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent of Hewlett Packard Company Microsoft MS DOS and Windows are U S registered trademarks of Microsoft Corpo...

Страница 4: ... set of programs that control the input and output of data to peripherals Upgrading and Adding Accessories information about how to install new hardware components such as main memory or expansion cards Purpose of This Guide The purpose of this guide is to provide you with technical information about your computer This is information that you will not need to reference every day but which you will...

Страница 5: ...r Computer 10 System Board Layout 10 11 Main Components and Features of the System Board 12 System Board Configuration Jumpers 13 Your Sound Card 14 Connecting Audio Devices to the Rear Panel 15 Connecting Audio Devices to the Internal Connectors 16 Power Consumption 17 Typical Power Consumption Availability 17 Your HP Enhanced Keyboard 18 ...

Страница 6: ...Your Changes and Leaving Setup 27 Protecting Your Computer 28 Restricting Access to Your Computer Setting a Password 28 Power Management in the BIOS 29 Checking Your Configuration 30 Warning Messages and the Power On Self Test 31 Beep Codes 31 How to Recover if Things Go Wrong 32 System Boot Failure 32 Incorrect Password on Startup 32 Clearing the CMOS Configuration 33 3 Upgrading and Adding Acces...

Страница 7: ...eplacing the Cover 39 Upgrading Main Memory 41 Upgrading Video Memory 44 Upgrading a Processor 46 Adding Accessories 51 Adding Expansion Cards 51 Installing an Expansion Card 52 Installing Storage Devices 56 Changing the Battery 64 AppendixAT Commands Basic AT Commands 66 Modem Response Messages 71 Glossary 77 Index 81 ...

Страница 8: ...8 ...

Страница 9: ...1 About Your Hardware ...

Страница 10: ...ferent components and connections are located on the board Secondary IDE Connector Primary IDE Connector Floppy Disk Drive Connector 2 ISA Expansion Card Slots COMBO Slot PCI or ISA 2 PCI Expansion Card Slots AGP Slot Main Memory Module and Sockets Power Supply Connector Clear CMOS refer to page 33 Processor and Socket Video Controller Processor Frequency Selection Jumper Strip refer to page 46 Ba...

Страница 11: ...2 PCI Expansion Card Slots AGP Slot Main Memory Module and Sockets Power Supply Connector Clear CMOS refer to page 33 Processor and Socket Video Controller Processor Frequency Selection Jumper Strip refer to page 46 Battery Fan Chassis Connector Power Supply Fan Rear Panel Connectors The processor on this system board may differ from the one shown ...

Страница 12: ...py Disk Drive controller supporting two devices Rear panel connectors 1 mouse socket 1 keyboard socket 1 display connector 2 Universal Serial Bus USB connectors 1 parallel port 1 serial port The main memory controller supports two or three DIMM slots Each slot can host a 168 pin unbuffered DIMM module for a total of up to 192 MB of dynamic random access memory These slots can be filled in any orde...

Страница 13: ...ion This is the default setting Refer to Clearing the CMOS Configuration on page 33 for information about clearing the CMOS and using this jumper Microprocessor ConfigurationJumper J23 This jumper allows the system board to match the speed of the installed processor You only need to change the microprocessor configuration jumper if you install a new processor with a different speed to the one that...

Страница 14: ...note below Telephone Answering Device Connector refer to note below Multimedia Control Panel Microphone Connector refer to note below Jumpers are required between pins 3 and 4 and between pins 5 and 6 of the Multimedia Control Panel Connector Without these jumpers the sound card will not output sound through the rear panel These jumper connections are set by default Line In Microphone Line Out Spe...

Страница 15: ...ted headphone jack for this purpose SPEAKERS Connect speakers for audio output from the card s built in power amplifier Adjust the volume from within the software or from the multimedia control panel if this feature is on your computer MIDI GAME Connect a joystick for game software or MIDI instrument The MIDI port is disabled by default You will have to enable this port if you wish to use it with ...

Страница 16: ...similar card It can also be used to accept decompressed audio data from an MPEG video card The AUX In connector has the following pin assignments CDAudioConnector The CD Audio Connector labeled CDAUDIO allows you to connect the sound card to the CD ROM drive via the audio cable so that you can listen to audio from the CD ROM drive The CD Audio Connector has the following pin assignments Pin Signal...

Страница 17: ...ff Note When the computer is turned off with the power button on the front panel the power consumption falls below three watts but it is not zero The special on off method used by this computer considerably extends the lifetime of the power supply To reach zero power consumption in off mode either unplug the computer from the power outlet or use a power block with a switch ISA Expansion Card Slots...

Страница 18: ...us software applications You can also create your own shortcuts to your most frequent tasks by configuring certain keys For example you can access your word processor application at a touch of a single key Messages key with mail LED HP Brio Center WEB browser Menu key Suspend key Mute Volume control Information Display the Windows Start menu by pressing either of the two Windows keys Access the ri...

Страница 19: ...o either turn on the power saving capabilities if configured in the Control Panel or start the screen saver It is recommended that you configure your screen saver with a password to lock the computer when the screen saver is activated A screen saver will not be cleared until the correct password has been typed No Information Accesses the information section of the HP Brio Center No Mute and Volume...

Страница 20: ...ab from the Keyboard Properties screen To define a Shortcut key you need to Click here to restore the default settings for the shortcut key Use the Browse button to locate the file you want to use in the Command field Click here to activate the Question Mark pointer Then click any element to obtain information Provide a Command which is the executable that starts the application Provide a Descript...

Страница 21: ...ed in your Internet settings Click this button to restore the default settings for the shortcut key Reduce the power used by the computer by putting it in suspend mode This option is activated by pressing the Suspend key Click here to activate the Question Mark pointer Then click any element to obtain information 1 The Turn Power Management on and Turn screen saver on options can both be enabled a...

Страница 22: ...22 1 About Your Hardware Your HP Enhanced Keyboard ...

Страница 23: ...2 About Your BIOS ...

Страница 24: ...ning on your computer which has been written to be independent of any particular computer and your computer s hardware the hard disk the keyboard the display and so on The BIOS is part of the System ROM and is stored in a chip on the system board A computer s BIOS is specific to that computer WhatCanIDowiththe BIOS You can configure certain aspects of your computer by using the Setup program which...

Страница 25: ...mputer For information on how to set a password refer to Restricting Access to Your Computer Setting a Password on page 28 Power for selecting power management modes to reduce the amount of energy used after specified periods of inactivity Refer to Power Management in the BIOS on page 29 Boot for choosing your boot device order and priority Refer to Boot Device Priority on page 27 Exit for leaving...

Страница 26: ...with a solid right arrow The key or keys allow you to exit from a sub menu The and arrows select menus from the menu bar The key loads factory installed default values The key saves and exits from the Setup program The key or keys display the general help screen The key exits from the general help screen Pressing the or arrows while you are on a main menu screen will take you to the next menu opti...

Страница 27: ... boot device use the and arrows then press the key to move the device up the list or the key to move it down the list Changing the Boot Device Priority for the current boot You can also change the boot order just for the current boot To do this press while the logo and the message Press F2 to enter SETUP are displayed during system startup This initially displays the POST before displaying the Boo...

Страница 28: ...uter being started or used in your absence The password is entered when the POST has completed before the computer finishes its normal startup procedure Password on boot can only be enabled if the Password has already been set It should be noted that this password option is not linked with your Windows operating system To enable a Password on Boot 1 Start the Setup Program 2 Select the Security me...

Страница 29: ...ent settings though the HP Setup program use the or keys to move along the main menu bar to the Power Menu The item is then highlighted and displays the available power management options You will be able to set the delay before the system can automatically enter Suspend Mode and also specify the events which make the computer wake up In most cases default settings should be appropriate However yo...

Страница 30: ...ter s logo displaying the system components and devices Press the Pause Break key to freeze the screen When you have finished reading the POST screen press any key to continue At the end of the POST screen the Boot Menu will be displayed You can either choose to exit the menu by pressing the key or enter the Boot Menu to modify the device for the current boot How to modify the current boot device ...

Страница 31: ...he error when the system is unable to display the error messages The following table is a list of beep codes issued for terminal errors Beep Pattern Numeric Code Description B4h This does not indicate an error There is one short beep before system startup 16h BIOS ROM checksum failure 20h DRAM refresh test failure 22h 8742 Keyboard controller test failure 2Ch RAM failure on address line 2Eh RAM fa...

Страница 32: ...tup program These settings will have to be reconfigured If you are having problems with POST error messages you probably need to clear the current configuration memory values and reset the built in default values Refer to Clearing the CMOS Configuration below for details on how to do this Incorrect Password on Startup After three unsuccessful attempts to enter the correct password on Password on B...

Страница 33: ...ng the Cover on page 39 for any assistance 3 Place the jumper on pins 2 3 refer to page 10 for the jumper strip J22 location on the system board to clear the CMOS 4 Wait for a couple of seconds then place the jumper on pins 1 2 to re enable the configuration 5 Replace the cover Reconnect the power cord and any peripherals to the computer 6 Turn on the computer To set a new system password you will...

Страница 34: ...34 2 About Your BIOS How to Recover if Things Go Wrong ...

Страница 35: ...3 Upgrading and Adding Accessories ...

Страница 36: ...ns enhancing and accelerating graphics intensive applications To find out more about upgrading the video memory refer to Upgrading Video Memory on page 44 ExpansionCards An expansion card or accessory board is a component that usually adds some specialized function to a computer For example installing a network card can in conjunction with the necessary software and cables connect a computer to a ...

Страница 37: ...nnector Fan Chassis Connector CD ROM Drive bay 5 25 inch Accessory bay 5 25 inch Floppy or Hard Disk Drive bay 3 5 inch Floppy Disk Drive Drive A Second 3 5 inch Floppy Disk Zip or Tape Drive bay Expansion Cards For example a sound card Main Memory Upgrade Modules 16 MB 32 MB or 64 MB Battery IDE and Floppy Drive Connectors AGP Video Slot Extension Card Slots BIOS Flash Power Connector Fan Chassis...

Страница 38: ...WhyUpgradethe BIOS Hewlett Packard are continually improving the BIOS in their computers introducing new features and making them more efficient You can therefore keep your own computer up to date by upgrading the BIOS HowDoIUpgradethe BIOS To upgrade your system BIOS download the appropriate BIOS utility from our support WEB site http www hp com go smallbizsupport ...

Страница 39: ...any telecommunications cables 2 If necessary unlock the cover using the key on the back panel Remove the four screws from the back of the computer 3 Pull the cover back 1 5 cm then lift the cover completely off the computer s chassis Warning For your safety never remove the computer s cover without first removing the power cord and any connection to a telecommunications network Always replace the ...

Страница 40: ...gap between the front edge of the cover and the front bezel 3 While holding the cover as shown lift the cover up approximately 1 cm until a pop is heard then lower the cover Metal tabs at the bottom of the cover should now be hooked onto the chassis of the computer 4 Push the cover forward until it meets the front bezel Secure the cover in place by replacing the four screws on the rear panel If re...

Страница 41: ...0 times slower than main memory The amount of main memory your computer requires depends on the operating system and the applications you use You may need more memory if you use memory hungry applications for example image processing and desktop publishing applications or if you run several applications at the same time HowMuchMain MemoryCanIAdd Your computer is capable of supporting up to 192 MB ...

Страница 42: ...s the memory module completely into the connector until the retaining clips click into position 5 If you need to remove a memory module perhaps because you are replacing an existing module refer to Removing a Memory Module below Caution Static electricity can damage electronic components Turn off all equipment Don t let your clothes touch the accessory To equalize the static electricity rest the a...

Страница 43: ...ted during the computer s startup routine press to view the error s and take any necessary action If you have any doubts about using the HP Setup program contact your reseller for help If you cannot start your computer properly remove the memory and try starting your computer again If the computer now starts without any problems there may be a problem with the new memory If you experience any othe...

Страница 44: ...0 x 600 default setting If you increase the resolution to 1024 x 768 you will only be able to have 256 colors available which will result in a flickering and bad ergonomic display In this case 2 MB of video memory is necessary to keep the optimal colors and refresh rate HowMuchVideo MemoryCanIAdd If your computer has 2 MB of video memory on the system board it cannot be increased unless you use a ...

Страница 45: ...he card slides into the slot completely and does not touch any components on other cards Secure the AGP video card How to install an expansion card is described on page 52 6 Install any other accessories before returning the computer to the upright position and replacing the cover Reconnect all cables and power cords 7 Turn on the display and then turn on the computer 8 In Windows change the video...

Страница 46: ... the new memory If you experience any other problems as a result of the upgrade and your computer is supplied with the HP Brio Center refer to the support tools for further assistance Upgrading a Processor WhyUpgradethe Processor The speed at which the processor can perform tasks is determined by the processor s internal speed the faster the internal speed the faster tasks can be performed Replaci...

Страница 47: ...ssor 1 Remove the computer s cover refer to Removing the Cover on page 39 2 On a table top turn the computer on its side with the system board closest to the surface of the table top 3 Remove the airflow guide covering the processor open the retaining clips on top of the airflow guide slide it back so that it clears the fan then lift it out of the computer System Board Retaining clips System Board...

Страница 48: ...theNew Processor 1 The type of processor will depend on the system board in your computer If the processor you have in your computer is the one in picture then you must make sure that the clips are pointing outwards before inserting the processor 2 Slide the new processor into the processor socket and push gently until it snaps into place the processor can only go in one way ...

Страница 49: ...nected to the Fan Chassis Connector on the system board 2 Install any other accessories before returning the computer to the upright position replacing the cover and reconnecting the power cords and any telecommunications cables 3 Turn on the display and computer The computer should recognize the new processor CPU SPEED CPUCLK Ratio Jumper Position 233 MHz 2 7 1 2 and 9 10 266 MHz 1 4 5 6 7 8 and ...

Страница 50: ...the processor If the new processor is still not recognized remove it and put the old processor back into the computer remember to reset any system board jumpers if necessary and then restart the computer If the computer now starts without any problems there may be a problem with the new processor If you experience any other problems as a result of the upgrade and your computer is supplied with the...

Страница 51: ... the number of slots that are occupied This is the number of expansion cards that are installed HowManyExpansion CardsCanIInstall Your computer supports up to six cards refer to page 13 The Windows operating system can automatically recognize and configure many expansion cards that you may want to install in your computer With other cards you will be required either to install a driver or to run t...

Страница 52: ...by its top edge with the card s connector pointing towards the slot s connector Do not bend the card Carefully slide the card into the slot and firmly press it into place Ensure that the card s connector engages completely with the slot s connector and does not touch components on other cards Caution Static electricity can damage electronic components Turn off all equipment Don t let your clothes ...

Страница 53: ...ize and configure the card automatically The New Hardware Found dialog box is displayed while Windows loads the necessary driver s If Windows does not find the correct driver it displays the following choices for you to select Windows default driver Shaded if the card is not known by Windows If this option is available select it Driver from disk provided by the manufacturer If a Windows default dr...

Страница 54: ...puter now starts without any problems there may be a problem with the new card If you experience any other problems as a result of the upgrade and your computer is supplied with the HP Brio Center refer to the support tools for further assistance Fax Modem Card Warning Do not attempt to connect this product to the phone line during a lightning storm Never install telephone jacks in wet locations u...

Страница 55: ... each end by its top edge If the card is tight loosen the screws on the adjacent slots Do not bend the card If you intend to replace the card later note which connector it is in 4 With its components facing up place the card on a clean flat solid static free surface Handle the card by its edges 5 Install any new accessories 6 Replace the expansion card if necessary refer to steps 5 and 6 on page 5...

Страница 56: ...vicesCanIAdd The number of storage devices that you can add to your computer is determined by the number of mounting bays that are unused and by the number of storage device interface channels that are unused Your computer has a 3 5 inch floppy disk drive and either a 3 5 inch or 5 25 inch hard disk drive already installed There may also be a CD ROM drive installed The on system board electronics ...

Страница 57: ...k drive cable This supports up to two floppy disk drives or one floppy disk drive and one tape drive One 3 5 inch floppy disk Drive A is already connected to the Master connector on this cable SystemBoard Connectors If you add a floppy disk drive hard disk drive CD ROM drive Zip drive or tape drive you need to connect it to power and data cables The connectors are shaped to fit one way only The da...

Страница 58: ...ive is connected to the hard disk drive must be connected to the Master connector in the cable from the system board not the Slave connector If you have a CD ROM drive currently connected to the Master connector you must reconnect the CD ROM drive to the Slave connector of the cable and then attach the new hard disk drive to the Master connector Power Connectors for Hard Disk Drives Tape Drives 5 ...

Страница 59: ... the new hard disk in the 5 25 inch bay Have the connectors of the new hard disk drive pointing towards the back of the computer 3 Secure the drive to the computer using the four screws provided with the drive Two screws must be inserted in each side of the drive Using screws other than those provided may cause damage to the device 4 Connect the power and data cables to the rear of the drive Both ...

Страница 60: ...e from within Windows Troubleshooting If the new drive is not recognized you may need to run the Setup program restart the computer and press when Press F2 to enter SETUP is displayed at the bottom of the screen If you have any doubts about using the HP Setup program contact your reseller for help If the new drive is still not recognized check that you have correctly followed the installation proc...

Страница 61: ...mputer by hooking your fingers in the gap and pulling it should still be connected at the top Then gently continue to pull the front bezel outwards until it is completely detached from the computer 2 Check that there are no mounting rails attached to the device If there are mounting rails attached you should remove them Table edge To remove the plastic panel from the bezel unclip and push outwards...

Страница 62: ...faceplate on the 5 25 inch bay by inserting a flathead screwdriver into the slot then push outward until the faceplate snaps off CD ROM Warning To avoid electric shock and harm to your eyes by laser light do not open the laser module The laser module should be serviced by service people only Do not attempt to make any adjustment to the laser unit Refer to the label on the CD ROM for power requirem...

Страница 63: ...nding on the type of drive you have installed you may need to install some driver software This could be done when you have returned to the operating system Troubleshooting If the new drive is not recognized you may need to run the Setup program restart the computer and press when Press F2 to enter SETUP is displayed at the bottom of the screen If you have any doubts about using the HP Setup progr...

Страница 64: ...n Replace the cover and reconnecting the power cords and any telecommunications cables Run the Setup program to reconfigure the computer Warning There is a danger of explosion if the battery is incorrectly installed For your safety never attempt to recharge disassemble or burn the old battery Replace the battery only with the same type or equivalent type recommended by the manufacturer The battery...

Страница 65: ...Appendix AT Commands ...

Страница 66: ...a mode and Command mode In either case the computer stays connected to remote modem ATA Manually answers incoming calls Modem does not answer the telephone A Repeats the last command line executed AT Attention Begins each command line except A Tests that your modem is working and configured correctly If characters you type do not appear on your screen your modem is not configured properly ATBn Swi...

Страница 67: ...from 0 to 3 Calls exchange by flash Switches off calling tone during current dialing process H Terminates the dialing sequence and causes the modem to go offline after dialing so that you can conduct a normal voice conversation Example ATDT123456 H Pauses the register S8 time Waits for 5 seconds of silence Stays in Command Mode after dialing ATEn Controls the Echo function where n is either 0 or 1...

Страница 68: ...ry NVRAM settings 6 Link diagnostics 7 Product configuration 8 Return the blacklisted phone numbers ATLn Loudspeaker volume control where n is a digit from 0 to 3 0 Modem speaker disabled 1 Low speaker volume 2 Medium speaker volume 3 High speaker volume ATMn Switches speaker on or off where n is a digit from 0 to 3 0 Speaker off 1 Speaker on until carrier detected 2 Speaker always on 3 Speaker on...

Страница 69: ...s on first ring ATS0 0 turns off auto answer to manually answer calls use the A command ATVn Selects modem message format alphabetic or alphanumeric where n is either 0 or 1 0 Sends responses as numbers 1 Sends responses as characters ATXn Sets result code displayed Default value is X4 ATYn Selects power on reset default configuration where n is either 0 or 1 0 Default is profile 0 setting in NVRA...

Страница 70: ...t your modem responds to the Data Terminal Ready DTR signal 0 Ignores DTR signal 1 Modem interprets an ON to OFF transition as escape characters and moves to Command Mode while keeping data connection 2 An ON to OFF DTR transition causes the modem to hang up and disables auto answer 3 An ON to OFF DTR transition resets the modem to hang up and disables auto answer AT F Modem returns to factory def...

Страница 71: ...all 03 NO CARRIER The remote carrier signal is not detected 04 ERROR You typed an invalid command line or a command line that is too long 05 CONNECT 1200 Modem is configured to report line speed which is 1200 bps or modem is configured to report the DTE speed which is 1200 bps 06 NO DIAL TONE The modem cannot dial the number you specified because there is no dial tone this response is enabled when...

Страница 72: ...200 bps 1 14 CONNECT 12 000 Modem is configured to report the DTE speed which is 12 000 bps 1 15 CONNECT 14 400 Modem is configured to report the DTE speed which is 14 400 bps 1 16 CONNECT 19 200 Modem is configured to report the DTE speed which is 19 200 bps 1 17 CONNECT 38 400 Modem is configured to report the DTE speed which is 38 400 bps 1 18 CONNECT 57 600 Modem is configured to report the DT...

Страница 73: ...d at 300 bps 2 44 CARRIER 1200 75 Carrier transmit at 1200 bps receive at 75 bps 2 45 CARRIER 75 1200 V 22 or Bell 212 carrier detected at 1200 bps 2 46 CARRIER 1200 V 22 or Bell 212 carrier detected at 1200 bps 2 47 CARRIER 2400 V 22bis carrier detected at 2400 bps 2 48 CARRIER 4800 V 32bis or V 32 carrier detected at 4800 bps 2 49 CARRIER 7200 V 32bis carrier detected at 7200 bps 2 50 CARRIER 96...

Страница 74: ...200 V 34bis carrier detected at 31 200 bps 2 79 CARRIER 33 600 V 34bis carrier detected at 33 600 bps 2 59 CONNECT 16 800 Modem is configured to report the DTE speed which is 16 800 bps 2 61 CONNECT 21 600 Modem is configured to report the DTE speed which is 21 600 bps 2 62 CONNECT 24 000 Modem is configured to report the DTE speed which is 24 000 bps 2 63 CONNECT 26 400 Modem is configured to rep...

Страница 75: ...o compression negotiated 2 70 PROTOCOL NONE Protocol reporting enabled using X4 and Register S95 and modem has made a data connection without any error correction 2 77 PROTOCOL LAPM Modem has made a data connection using V 42 LAPM error correction 2 80 PROTOCOL ALT Modem has made an MNP connection 2 81 PROTOCOL ALT CELLULAR Modem has made an MNP 10 connection 2 1 Response is enabled by the V1 comm...

Страница 76: ...76 Appendix AT Commands Modem Response Messages ...

Страница 77: ...y the clock rate DAT Digital Audio Tape Device driver Software that enables the computer to work with a specific peripheral such as a printer DIMM Dual In line Memory Module 64 or 72 bit data path DMA Direct Memory Access A DMA channel allows certain types of data transfer between RAM and a device to bypass the microprocessor DMA channel Direct Memory Access channel Speeds up I O to and from the s...

Страница 78: ...amount of memory available in the computer MIDI Musical Instrument Digital Interface An international hardware software standard that specifies the cable and hardware interface that allows several devices instruments and computers to interchange music codes and events MPEG Motion Picture Expert Group A standard for video sequence compression You can play back MPEG files from the WEB or a video CD ...

Страница 79: ...l devices to computer Serial ports allow connections to a mouse modem or printer Setup program Used to inform the computer about its configuration for example the amount of memory installed the date and time disk controllers and so forth The Setup program is stored in ROM on the system board Sound files Files containing sound data Sound files are usually stored in one of two formats with the exten...

Страница 80: ...Glossary 80 ...

Страница 81: ...ge device 57 cover removing 39 replacing 40 D DAT player connecting 15 DMA channels explanation 77 E enhanced keyboard creating shortcuts 20 21 using enhanced keys 19 error messages Beep codes 31 expansion card Plug and Play 51 53 removing 55 expansion card slots 13 external amplifier connecting 15 F fan chassis connector 10 11 floppy disk drive 56 floppy disk drive connector 10 11 floppy disk dri...

Страница 82: ...ng 44 menu enhanced keyboard 19 messages in response to AT commands 71 messages and LED key enhanced keyboard 19 MIC jack 15 microphone connecting 15 MIDI defined 78 MIDI instrument connecting 15 Minidisc player connecting 15 modem response messages 71 P passwords password on boot 28 setting a password in the BIOS 28 Plug and Play card 51 53 POST Beep codes table 31 power key enhanced keyboard 19 ...

Страница 83: ...ctors 12 video memory 12 system characteristics power consumption 17 system recovery if incorrect password on startup 32 the system startup fails 32 you need to clear the CMOS 32 T tape deck connecting 15 tape drive installing 56 troubleshooting installing a processor 50 installing an expansion card 54 installing drives 63 installing main memory modules 43 installing storage devices 60 installing ...

Страница 84: ...Index 84 ...

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