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Страница 2: ...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 the receiving antenna Relocate the computer with respect to the receIver Move the computer away from the receiver Plug the computer into a different outlet so that computer and receiver are on different branch circuits If necessary you should...

Страница 3: ...y assumed for damages resulting from the use of the information contained herein Copyright 1988 by Video Technology Computers Ltd IBM is a registered trademark of International Business Machines Corp Hercules is a registered trademark of Hercules Computer Technology Intel is a registered trademark of Intel Corporation MS DOS is a registered trademark of Microsoft Corporation Lotus 1 2 3 IS a regis...

Страница 4: ...ock 15 Operation Speed 16 Chapter 2 Using the Keyboard 17 The Keyboard Security Lock 17 Overview 18 Typewriter Keys 19 Nunleric Keypad 22 Editing and Cursor Control Keys 25 Function Keys 27 Chapter 3 Introduction for New Users 29 Facts You Should Know 29 Introduction to MS DOS 30 Storing Files on a Computer 31 Organizing Files into Directories 32 The Menu of MS DOS Activities 34 How to Care for Yo...

Страница 5: ...cessor 56 Installing Expanded Memory 58 Using Expanded Memory 60 Installing a Hard Disk Drive 62 Chapter 5 Troubleshooting Checklist 63 Symptoms and Suggestions 63 Beeps 65 Display Messages 66 Chapter 6 Further Reading Getting More Help 67 Appendices 69 Appendix 1 Dip Switches and Settings 69 Appendix 2 The Multi I O Card 73 Appendix 3 The Monochrome Graphics Color Graphics Card 79 Appendix 4 Glos...

Страница 6: ...T compatible processor running at 4 77 or 10 MHz 512K memory expandable to 1664K 150 watt power supply Two 5 25 360K floppy drives some versions come with one 5 25 360K and one 3 5 720K floppy drive additional space for one half height hard disk drive Some versions of computer have hard disk installed 102 key enhanced keyboard Multi I O Card supporting Centronics parallel printer interface RS232 s...

Страница 7: ...lots In this fIrst chapter we will guide you through the installation of the computer and introduce you to the basic structure of the computer If you are unfamiliar with the meaning of a cer tain term you can consult the glossary in Appendix 4 for a definition 6 ...

Страница 8: ...it on top of the system unit if space is at a premium You will need the following A grounded three prong power outlet A small flathead screwdriver These tools are sufficient for a normal installation If you need to open up the system unit to install additional memory disk drives or expansion cards you ll also need the following A small Philips screwdriver A cup or an ashtray to hold loose screws 7...

Страница 9: ...ystem unit A keyboard A power cord A video cable for composite monitors A package with manuals for MS DOS and GW BASIC optional A package containing four diskettes A warranty card It is important to save the carton and packing materials in case you need to ship your unit in the future Be sure to return the warranty card as soon as possible 8 ...

Страница 10: ...ard is locked and reset button is disabled The speed indicator is used to indicate the operation speed of the computer a 5 will be displayed when computer operates at normal speed 4 77MHz and a 10 will be displayed when the computer operates at high speed 10 MHz Notice the latch on each of the disk drives With the latch in the horizontal position pointing to the right the drive is open and ready t...

Страница 11: ...t connectors You should notice Monochrome monitor EGA card DIP switch eGA monochrome or EGA monitor Toggle switch For composite monochrome monitor Monochrome graphics Color graphiCS card In normal installations there is no need to open the system cabinet If you will be adding enhancements see Chapter 4 for instructions on opening the system unit 10 ...

Страница 12: ...he monitor s cable into the appropriate place on the Monochrome Graphics Color Graphics Card For monochrome composite monitors use the top round socket For color composite monitors use the round socket in the middle right above the slide switch For Hercules or RGB monitors use the 9 pin D socket on the bottom of the adapter 4 Connect the power cord from your monitor into a grounded 3 prong wall ou...

Страница 13: ...n the back of the system unit Plug the other end into a grounded three prong wall outlet 7 Flip up the levers on the two floppy disk drives and remove the sheets of cardboard that protect the drives during shipping Remember to save these cards with the rest of the packaging 12 ...

Страница 14: ...t up procedure the system performs a mem ory test then loads the MS DOS operating system After several seconds the following display will appear LASER TURBO XT Start Up Utility Main Menu A Format a disk H Change directory B Format a sys disk I Display directory C Format hard drive J Run a program D Copy file s K Change date time E Copy disk L Check config F Make a directory M Display help file G R...

Страница 15: ...e floppy drive with the label side up The oval opening in the diskette should go in first When the diskette is all the way into the drive close the latch by moving the lever into the down position Then performs step 1 to step 3 as described above For _ computer with hard disk installed subdirectories are opened for MSDOS GW BASIC and start up utility These users can practice with DOS BASIC and sta...

Страница 16: ...etters the same way so it doesn t matter whether you re using capital or small letters 3 The system will display the current date Type m the correct date in the form mm dd yy ENTER For example to set the date for New Year s Day 1988 you would type 01 01 88 ENTER 4 The current time now appears on the screen Press EN TER if no change is necessary or type in the correct time using the format hh mm ss...

Страница 17: ...to maintain full compatibility with the original IBM PC XT When possible though you should try to operate your computer at the turbo speed of 10 MHz After warm or cold start your computer will operate at 4 77MHz For 4 77MHz Operation Press and I Isimultaneously For 10 MHz Turbo Operation Press and simultaneously 16 ...

Страница 18: ...can be typed in to the computer protecting your system from unwanted intruders You receive two keys with the unit Make sure you store one in a safe place Two LEDs are used to indicate whether the keyboard is locked or unlocked For example when the keyboard is locked the LED labelled with keyboard lock will be on Lock ON Lock OFF Indicator Indicator 17 ...

Страница 19: ...yboard clearly its helpful to divide it into four parts each with its own function In this chapter we ll refer to these four areas The Typewriter Keypad with control keys The Numeric Keypad The Editing and Cursor Control keys The Function Keys The diagram below shows the four principal keypads Typewriter keys Editing Cursor Control Numeric ke pali 18 ...

Страница 20: ...B and CAPS LOCK You ll also notice several special control keys specifically associated with computer operations including the ESC CfRL ALT and ENTER keys Here s a brief explanation of some important typewriter and control keys B CAPS WCK This is similar to the Sbift Caps Lock Lock key on an ordinary typewriter With this key you can type upper case letters without holding down the SHIFT key When C...

Страница 21: ...the typewriter it moves the cursor to the next tab top Tab stops occur every eight characters unless otherwise specified Using SHIFT with TAB moves the cursor backwards to the previous tab stop ESC The ESCAPE key has different meanings depending on the application you are using In the BASIC language for example ESC erases a line from the screen CTRL The CONTROL key does nothing on its own Like the...

Страница 22: ...rforms no function on its own It is used in conjunction with other keys to perform special functions The meaning of ALT varies depending on the application you re using While using the BASIC language the ALT key allows you to quickly and easily enter BASIC keywords with a single keystroke For example ALT I generates the word INPUT Here s a table of ALT key combinations in BASIC A AUTO M MOTOR B BS...

Страница 23: ...move the cursor or do special editing features The 102 key enhanced keyboard provides a separate keypad for cursor control and editing located immediately to the left of the numeric keypad For this reason most users will find it convenient to leave the NUM LOCK key on This allows the numeric keypad to be used for rapid entry of numbers These keys operate the same regardless of the status of the NU...

Страница 24: ...for division These keys behave differently depending on the status of the NUM LOCK key NUM LOCK ON NUM LOCK OFF The number 1 END Moves the cursor to the end of the line The number 2 Moves the cursor down The number 3 PG DN Moves the cur sor down one page or 25 lines The number 4 Moves the cursor left The number 5 No function 23 ...

Страница 25: ...Moves the cursor right HOME Moves the cursor to the screen s upper left hand corner Moves the cursor up PG UP Moves the cursor up to the beginning of a page INS Insert Turns on insert mode Characters typed are inserted before text that already exists DEL Delete Erases one character at the position of the cursor 24 ...

Страница 26: ...ic the NUM LOCK key off H 0 ME Moves the cursor to the first charac ter in the upper left hand corner of the screen CURSOR UP Moves the cursor up one line CURSOR DOWN Moves the cursor down one line CURSOR RIGHT Moves the cursor one character to the right CURSOR LEFr Moves the cursor left one character END Moves the cursor to the right of the last character on the line 25 ...

Страница 27: ...er INSERT Turns on the insert mode Char acters you type will be inserted before text that already exists pushing the existing text to the right With insert mode off characters to the right are overwritten PAGE UP PAGE DOWN Its functions arc defined by the application you are using In general these keys move the cursor up or down one page 25 lines 26 ...

Страница 28: ...ties FI Copies one character from a temporary storage area to the display Each time you enter a command MS DOS store the command in a temporary storage area EJ Fl Displays all characters preceding a specified character from the temporary storage area EJ F3 Copies all remaining characters storage area to the display from the EJ F4 Deletes fied character the characters preceding the speci from the t...

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Страница 30: ...m unit This fan is absolutely essential for cooling the internal components Do not block this fan Make sure you leave plenty of space for air to circulate behind the computer Static electricity can damage your system Your body picks up static electricity without you even knowing it and even a mild static shock can harm delicate computer compo nents To protect against static shock always touch the ...

Страница 31: ... you actually need to know very little about the MS DOS operating system On the other hand if you plan on wntmg your own programs you may have to learn quite a bit about it We recommend learning enough about MS DOS so you can take advantages of all the features of your computer We will provide a basic introduction to MS DOS in this booklet To find out more you should consult the MS DOS User s Guid...

Страница 32: ...d with a spreadsheet package like Lotus 1 2 3 All fIles are referred to by their filename MS DOS fIlenames may not be more than eight characters long Filenames can contain letters numbers and the symbols A or To further identify a file a fIlename can contain an extension of up to three characters The extension always appears at the end of the of a filename preceded by a period Extensions are a goo...

Страница 33: ...oot directory can be subdivided into more directories for the sake of organization For example all word processing documents could be stored in a directory named Letters Checkbook balances and your home budget could be grouped into a directory named Finance For many purposes especially if you are using floppy disks only you may not need any additional directories The root directory alone should su...

Страница 34: ...Budget OFFICE PERSONAL Checkbk Bills SlsDept AuntMary Acctg Janice Thank You The rules for naming directories are the same as those for naming fIles Names can be up to eight characters long and contain letters numbers and the symbols A or 1 33 ...

Страница 35: ... DOS Current directory c Current date time 05 01 88 09 35 51 Il 1988 Video Technology Corr puters Inc 11 This menu gives you an easy to use tool for working with MS DOS With one keystroke you can perform several common functions To use the menu 1 Touch the letter corresponding to the activity you wish to perform For example you would press the letter D to copy a file 2 The computer will ask you qu...

Страница 36: ... copy a file within a directory Doyou have FORMAT EXE in the current directory Y or N Enter the drive letter for format A D Doyou have FORMAT EXE in the current directory Y or N Enter the drive letter for system format A D Doyou have HARDFORMAT BAT in the current directory Y orN This command will completely ERASE the hard disk Are you sure you want to proceed Y orN Enter the source drive A D This ...

Страница 37: ...n program like a spreadsheet or word processing package Used to set or change the real time clock in the system Doyou have DISKCOPY EXE in the current directory l or N Enter the name for the new directory The directory must have ofiles for this to work Does it l or N Enter the name of the directory to remove Enter the drive letter A D Enter new directory name Enter qualifier Default If you leave t...

Страница 38: ... To restart the menu program enter MENU at the DOS prompt Doyou have WHATAMI EXE in the current directory Y or N Do you have HELPTXT in the current directory Y orN No options The MENU program allows you to perform several activities without having to learn MS DOS in great detail However we recommend becoming familiar with the most common and most useful MS DOS commands for further information cons...

Страница 39: ... add on device 3 Keep the computer away from excessive heat humidity dust or moisture 4 Do not cover the fan or ventilation holes on the back panel of the computer 5 Do not use thinner oil or petroleum based cleaners on the cabinet or keyboard Use only a damp cloth with a mild detergent if necessary for cleaning Make sure the power is off 6 If you need to move your computer system use the original...

Страница 40: ...is is a good way to make sure no one erases diskettes that are absolutely crucial Always handle your floppy diskettes carefully A small scratch stain or even a speck of dust can destroy the information stored on the diskette The following guidelines will help pro long the useful life of your diskettes and may help prevent the loss of important data Always keep diskettes m their protective envelope...

Страница 41: ...oft felt tip pen Never use a ball point pen to write on diskettes Keep diskettes out of direct sunlight and away from excessive heat They melt easily Some versions of the computer has a 720K 3 1 2 Floppy disk drive installed These drives use 3 1 2 Floppy diskettes which are capable of holding 720K bytes maxi mally 40 ...

Страница 42: ...t external drive is speci fied by assigning parameters on the CONFIG SYS file The installation procedure of external drive is shown below Normally after you have connected a 3 5 micro floppy disk drive to your computer you can access the drive as usual However you will not be able to format a 3 5 diskette with 720KB storage capacity This is expected because DOS presumes your drive is a 360KB 5 25 ...

Страница 43: ...cal drive C in addition to drive B If your 3 5 disk drive IS the first drive change the pa rameter d l to d O 3 Warm boot the system The message Loaded External Disk Driver for Drive Coo will be displayed which indicates the external drive is suc cessfully installed 3 5 disks can now be formatted in nOKB via drive C in the 3 5 disk drive While drive C is specifically created to allow formatting in...

Страница 44: ...side Furthermore some of the instructions may seem complicated especially for first time computer users If you are a new computer user you ntay want to have your dealer install the enhancements Before opening your system unit make sure the power to your computer is OFF and the unit is unplugged from the wall socket Attempting to install expansion cards memory or other internal components with the ...

Страница 45: ...tem unit there are five screws you need to remove Remove the screws and put them in a safe place Grasp the cover of the chassis with both hands and slide it forward and off as shown below There are several ribbon cables present in the system If you encounter any resistance while you are removing the system cover reach in and gently press down on these cables Do not attempt to yank off the cover if...

Страница 46: ... following areas of the system unit System Board Expansion Slots Hard Disk Controller Multiple Input Output I O Card EGA card Floppy Drives A and 5 1 4 360K Floppy Drive B 3 1 2 nOK Socket for an 8087 Math Co Processor Hard disk c Power Supply Sockets for Memory Expansion to 640K Ribbon Cables 4 Empty Rows for Installing Expanded Memory 2 DIP Switches 45 ...

Страница 47: ...k controller card Power supply Sockets for memory expansion to 640K 4 empty rows for installing lIiiiijg U2 lli e panded memory 9 5 1 4 floppy drive A or 5 1 4 floppy drive B 3 1 2 floppy disk B liard disk c 46 ...

Страница 48: ...e right place on the system board 3 Make sure the chips are pointing the right way when you install them in their sockets 4 Make sure none of the pins on the chip bend when you are pushing the chip into the socket 5 Set the proper switch on the system board so the computer recognizes all 640K Let s take each step in detail As always before you install anything Make sure the computer is unplugged f...

Страница 49: ...J sockets U36 U37 u _ U38 and U39 c J B l c J 3 Make sure the chips are pointing the right way Take a careful look at the top of the memory chips You ll see a small indentation notch or marking at one end of the chip Examine the two rows of memory chips currently installed in the computer Notice the indentation on the chips is pointing towards the center of the system board toward the back of the ...

Страница 50: ...e ready to actually install the RAM chips With the chip facing the right direction carefully place the prongs from the RAM chip into the holes on the socket Press downward No force is required to install RAM chips If you have to press hard you are probably bending a pin The pins that connect each chip to its socket are easily bent out of shape After installing the RAM chip make sure no pins are be...

Страница 51: ... SWI is a bank switch having 8 small switches and SW2 is a bank switch having four small switches Locate Switch Bank 1 SW1 as shown in the diagram E O c J c J c J Right now switch 3 IS ON To set your system to 640K of memory turn switch 3 OFF You can use the ip of a pencil or the head of a small screwdriver to move the switch 50 ...

Страница 52: ...weighs the benefits it produces so we recommend you don t make the extra investment for parity RAM In case you really want to install it here are the steps As always before you install anything MAKE SURE THE COM PUTER IS UNPLUGGED FROM THE WALL OUTLET 1 Purchase the proper chips Ask your dealer for two 2 4164 RAM chips 64K RAM x 1 and two 2 41256 RAM chips 256K RAM xl The chips must be 150 nanosec...

Страница 53: ...ps pointing in the same direction 4 Press the chips into place in their proper sockets Once again make sure no pins are bent or protruding from the socket S You ll need to adjust a jumper to tell the computer that parity RAM is now enabled In the diagram on the next page locate jumper JP5 located almost right next to SW1 Notice that the jumper is currently set for RAM Parity dis abled RAM Parity D...

Страница 54: ...able RAM parity gently lift the jumper of the two pins it s on now and place it on the two pins shown below RAM Parity Enabled Jumper JP5 Jumper JP7 IS now set to recognize that parity memory is installed 53 ...

Страница 55: ...pabilities of your computer 1 Before you begin Unplug the computer from the wall outlet Remember that circuit boards are sensitive to static elec tricity Rid your hands of static electricity by touching the system chassis every time before touching a circuit board 2 Choose an empty slot and remove the screw holding the slot cover to the back of the chassis 54 ...

Страница 56: ...3 Slide the card into place with its tab meeting the grooves in the expansion slot 4 Replace the slot cover screw which will secure the endplate bracket of the card to the back of the system unit 55 ...

Страница 57: ...It s manufactured by Intel and should be purchased from an authorized Intel dealer 1 Purchase the correct chip Ask the dealer for an 8087 1 math co processor The 8087 1 is necessary to take full advantage of your 10 MHz turbo speed 2 Identify the correct socket The 8087 1 is installed in the long empty socket located immediately next to the CPU 3 Make sure the chip is pointing in the right directi...

Страница 58: ...the co processor chip into place in its socket Once again make sure none of the pins are bent or protruding from the socket 5 Set the switch on the system board so the computer recog nizes the 8087 math co processor Locate Switch Bank 1 SW1 as shown in the diagram ON 12345678 Right now switch 2 is ON To set your system for the 8087 1 turn switch 2 OFF 57 ...

Страница 59: ... 1 ME As always before you install anything MAKE SURE THE COMPUTER IS UNPLUGGED FROM THE WALL OUTLET 1 Purchase the correct memory chips For every 512K of expanded memory you install Ask your dealer for sixteen 16 41256 RAM chips 256K RAM x 1 If you plan on using RAM parity you ll need eighteen instead of sixteen Th chips must be 150 nanoseconds 150ns or faster 2 Install the chips in the right soc...

Страница 60: ...ing the right way Make sure you install the RAM chips with the indentations pointing towards the center of the system board toward the back of the unit 4 Press the chips into place in their proper sockets Once again make sure no pins are bent or protruding from the socket 5 Set the switch on the system board so the computer recognizes the correct amount of expanded memory Locate Switch BankO Bank ...

Страница 61: ...her programs will not recognize expanded memory at all It depends specifically on the application you are using We have supplied two software programs which are used with your expanded memory The fIrst program is EMM SYS It must be installed before the expanded memory can be used The second program is ERAMDISK SYS a helpful program for implementing a RAM disk in expanded memory EMM SYS The MS DOS ...

Страница 62: ...rds with two floppy disk drives on your system Drive A and B the RAM disk becomes Drive C If you also have a hard disk installed the RAM disk becomes Drive D To use S12K of expanded memory as a RAM disk the following line must appear in CONFIG SYS DEVICE ERAMDISK SYS 512 To use 1MB of expanded memory as a RAM disk the following line must appear in CONFIG SYS DEVICE ERAMDISK SYS 1024 61 ...

Страница 63: ...ing this option 3 The system displays the question Drive C is a fixed disk drive Do you want to completely erase it Type in Y to format the hard disk drive If the hard disk did not come built in to the unit from the factory you can add one yourself Any hard drive compatible with the IBM PC XT can be used You must also purchase a hard disk controller that works with the drive you select Hard disk a...

Страница 64: ...f the system unit Monitor cable is not properly con nected to the Monochrome Graph ics Color Graphics Card Monitor power cable is not plugged in properly The monitor s power switch 18 not turned on The brightness or contrast knobs on the monitor are not properly adjusted The small slide switch on the Monochrome Graphics Color Graphics Card is not set correctly Set to MDA for monochrome TTL monitor...

Страница 65: ...g the reset button on the back of the system unit If neces sary turn your unit off then on again Keyboard lock is not off Latch on the disk drive is not closed properly The diskette was not placed in the drive correctly Make sure the label points up with the write protect notch pointing to the left You are using the wrong disk for start up Make sure you are using an MS DOS System Disk The diskette...

Страница 66: ...Base 64K RAM isn t usable Check the RAM chips 1 Long 2 Short The video selector switch on the Monochrome Graphics Color Graphics Card isn t properly set 1 Long 5 Short BIOS ROM checksum IS incorrect Replace the BIOS chip 65 ...

Страница 67: ...eck the connector on the board key Keyboard Error 02XX Keyboard returned the wrong test code xx Replace the keyboard Keyboard Error 04XX Keyboard interrupt would not clear Check Gate Array on the motherboard or replace the keyboard Memory Address Problem with memory Error addressing Possibly unconnected RAM legs or shorted address lines Check the RAM chips by replac ing one at a time For errors ge...

Страница 68: ...is a partial list of books available in retail stores or public libraries There are hundreds of other relevant books m print Consult your local library for a more complete listing These books are available from Howard W Sams Co Call 1 800 428 SAMS for a dealer near you Kate o Day Discovering MS DOS 4th Printing 1987 Steven Simrin MS DOS Bible 4th Printing 1986 Angermeyer Fahringer Jaeger and Shafe...

Страница 69: ... PC DOSjMS DOS Alfred Publishing Company Inc Your IBM PC Made Easy Osborne McGraw Hill Your IBM A Guide to the IBM PC OsbornejMcGraw Hill Learning DOS Microsoft Corporation How to Use Your IBM PC American Training Interna tional Teach Yourself PC DOS American Training International 68 ...

Страница 70: ...rmal operation Factory testing only Position 2 8087 1 Math Co Processor TI oooooo D oooooo 12345678 12345678 Without 8087 co processor With 8087 co processor Position 3 Conventional Memory Amount o ooooo TIo ooooo 12345678 12345678 512K conventional 640K conventional Memory Memory Installed Position 4 Not Used 69 ...

Страница 71: ...olor graphics adaptor 40 x25 mode DD 12345678 Color graphics adaptor 80x25 mode Monochrome display adaptor or Hercules graphics card Position 7 8 Floppy Disk Drives ON oooo o n m 12345678 12345678 One 1 floppy drive Two 2 floppy drives m 12345678 12345678 Three 3 floppy drives Four 4 floppy drives 70 ...

Страница 72: ...nstalled in the computer If you have up to one megabyte of expanded memory the settings are easy The position of switches 1 2 and 3 on SW2 determine the 1 o port address of the expanded memory I O Port Address ON ON ON ON 208h 218h 258h 268h ON ON ON ON 2A8h 2B8h 2E8h Expanded Memory disabled 71 ...

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Страница 74: ... Card you ll rod two jumper blocks Jumper JPl is used for setting the interrupt request levels for the real time clock In reality you should never have to change the setting of JPl Jumper JP2 shown below is responsible forconftgoring the ports on the Multi I O card Bracket _____________ RS232 Serial Interface Port Connectors Configuration Jumper Block Floppy Disk Interface Connector J5 JP2 Real Ti...

Страница 75: ...tration only They do not actually appear on the jumper block Row A Printer Port Enable Top of the card Top of the card A A Parallel Printer Parallel Printer Enabled Disabled Row B Printer Port Address Top of the card Top of the card B B LPTl LPT2 Row C Real Time Clock Address Top of the card Top of the card A A 340H 2COH 74 ...

Страница 76: ...ed for details Top of the card D COM2 Enabled Row E Floppy Disk Enable Top of the card E Floppy Disk Enabled Row F G H Not Used Row I Serial Port COM1 Top of the card I COMl Enabled additional hardware you can COM2 Contact your dealer Top of the card D COM2 Disabled Top of the card E Floppy Disk Disabled Top of the card I COMl Disabled 75 ...

Страница 77: ...ble with the IBM printer port Pin Description Pin 1 STROBE 10 2 DATA 0 11 3 DATA 1 12 4 DATA 2 13 5 DATA 3 14 6 DATA 4 15 7 DATA 5 16 8 DATA 6 17 9 DATA 7 18 25 25 pin D Style Connector Centronics standard PC XT parallel Description ACK BUSY PE S LECT AUTO FD ERROR INIT SELECT INPUT GROUND 76 ...

Страница 78: ...ut It is fully compatible with the IBM PC XT serial port Pin Description 1 CHASSIS GROUND 2 TRANSMIT DATA 3 RECEIVE DATA 4 REQUEST TO SEND 5 CLEAR TO SEND 6 DATA SET READY 7 SIGNAL GROUND 8 CARRIER DETECT 20 DATA TERMINAL READY 22 RING INDICATOR OTHERS NOT USED 25 pin D Style Connector 77 ...

Страница 79: ...hanism to the Laser Turbo XT using a is pin D style connector 1 I Vr l r xc din t 5V r I 9 I I I Switch 4 I X I 2 10 I I 1 r 1 3 1 4 I I 1 12 r Gnd I r l y e d I oor onate r y r 5 13 I Y I Iy Coord nate I r l_____jl rt 11IL J Switch 3 Switch 2 2J 78 ...

Страница 80: ...olor Graphics Card is fully compatible with the Hercules graphics card providing 720 x 348 resolution When the Monochrome Graphics Color Graphics Card is installed in a Laser Computer the slide MDAIol switch on the card faceplate is used to select eGA l J color graphics or monochrome operation Once you have set pole 5 and 6 or the DIP switch SWl to ON there are no other switches to set and no need...

Страница 81: ...raphics card e g EGA CGA or MDA You may have to disable the Laser BIOS built in to the graphics card When you disable the built in BIOS you will need to set the DIP switches inside the non Laser computer to match the MDA CGA slide switch on the card s faceplate To disable the built in BIOS 1 Locate the Jumper JP2 on the Graphics Adapter 2 Move the jumper so it covers pins 2 and 3 on JP2 JP2 80 ...

Страница 82: ...olor Graphics Card is disabled If your Laser computer is installed with EGA card please refer to user manual provided for the EGA card If your Laser computer is installed with hard disk controller card please refer to the user manual provided for the hard disk controller 81 ...

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Страница 84: ... chip receives your commands and executes them 8086 1 The 8086 1 chip is an improved version of the 8086 chip The 8086 1 replaces the 8086 and performs the same functions that the 8086 chip does However the 8086 1 is a turbo computer chip The 8086 1 can run at a speed of either 4 77 MHz or the turbo faster speed of 10 MHz Some IBM software programs are designed to run only at 4 77 MHz To run these...

Страница 85: ...ter from computer chips to floppy disk drives When the microprocessor needs to send a signal it asks the BIOS how to get there As an example you iI1struct your computer to read infor mation from disk drive B The microprocessor receives your command It then asks the BIOS where disk drive B is located At this point the BIOS will give the microprocessor specific directions from the location of the mi...

Страница 86: ...always the same If you have a clock in your computer it will keep time for you Cold Start When all power to your computer is turned off and you then tum power to your computer on you have cold started your computer COM COM is the computer abbreviation for a serial computer port Computers can be configured for more than one serial port Because of this COM ports are always desig nated as COM COM2 CO...

Страница 87: ...nnec tor which is a round plug with five pins male connector or five holes female connector DSDD DSDD stands for Double Sided Double Density and refers to floppy diskettes DSDD disks are the most common type of floppy disks used on IBM and compatible comput ers You can store more information on DSDD disks than on SSDD Single Sided Double Density disks because DSDD diskettes can hold information on...

Страница 88: ...eal gold is used on the gold fingers so that the expansion cards are not susceptible to tarnishing Tarnishing can interfere with an expansion card s connection to the motherboard Expansion Slot Your Computer computer has eight expansion slots They are located on the left hand side of the computer at the rear These expansion slots can be used to add features to your computer via expansion cards Fem...

Страница 89: ...e computer A hard disk allows you to access information more rapidly because you do not have to repeatedly load floppy disk ettes One note of caution because a hard drive is made up of so many layers of specialized magnetic media it is much more delicate Use care when handling or moving a computer with an installed hard drive and carefully read all precautions before handling or moving any hard di...

Страница 90: ... holes MHz MHz IS the abbreviation for Megahertz Megahertz IS a unit of measurement for computer s microprocessor speed Microprocessor See 8086 or 8086 1 Monochrome Monochrome means single color displays Typical mono chrome monitors are either green or amber with black backgrounds Motherboard The motherboard is the main circuitry board of your computer which houses all computer microcircuitry and ...

Страница 91: ...is turned off real time clocks traditionally have a battery back up A real time clock is an optional accessory for IBM XT s which frees you from having to repeatedly enter the date and time every time you boot MS DOS Resolution Every monitor display picture you see is made up of tiny dots called pixels Resolution is typically given in terms of horizontal dots by vertical dots The more dots pixels ...

Страница 92: ...ained on floppy diskettes Typically software allows you to do some thing with your computer i e play a game write a letter or design a spreadsheet for mathematical calculations Turbo Turbo lS a term used to mean faster speed A turbo computer like your computer runs at a faster speed than other computers Turbo computers work faster giving you the advantage of being done faster with whatever it is y...

Страница 93: ...loppy disk When you cover this notch you can not write information onto the floppy disk Write protect tabs are typically included with floppy diskettes when purchased so that you can use this safe guard measure for important data Warm Boot Restarting your computer using the Reset Button on the back of the system unit or the CTRL ALT DEL key sequence 92 ...

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