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Содержание microvax II 630qy

Страница 1: ...AZ GL1AA MN xx u Ae...

Страница 2: ...AZ GL1AA MN UU IIIIIIildllll J UIIIIIIllllflll MicroVAX II 630QY 630QZ Owner s Manual Prepared by SSGIML Publications of Digital Equipment Corporation...

Страница 3: ...is assumed for the use or reliability of software on equipment that is not supplied by DIGITAL or its affiliated companies Copyright 1985 by Digital Equipment Corporation All Rights Reserved Printed i...

Страница 4: ...HE SYSTEM OFF 2 10 MAKING BACKUP COPIES 2 11 RD52 OR RD53 FIXED DISK DRIVE 2 12 RX50 DISKETTE DRIVE 2 13 RX50 Diskettes 2 14 Diskette Handling and Storage Guidelines 2 16 Write Protecting a Diskette 2...

Страница 5: ...OVAX II SYSTEM B 1 Electrical Requirements B 3 Environmental Requirements B 4 Acoustic Noise Emission Information B 5 System Unit Physical Specifications B 6 RX50 DUAL DISKETTE DRIVE B 7 TK50 MAGNETIC...

Страница 6: ...e Installation and Operation sections of this manual before you attempt to install and operate the MicroVAX II system This manual is for a MicroVAX II system user little or no previous computer experi...

Страница 7: ...I...

Страница 8: ...ety requirements summarized in Appendix B in this manual If you prefer not to install the system yourself DIGITAL provides an instal lation service To install the system perform the following steps in...

Страница 9: ...Contact your delivery agent CAUTION Do not pick up the MicroVAX II system unit by its front and rear covers when moving it SYSTEM UNIT 1 2 TERMINAL CABLE 2 SCREWDRIVERS If 000000000 000000 LABEL SHEE...

Страница 10: ...iers and direct sunlight Minimize static by placing the unit away from busy office corridors Keep the area free from dust and other abrasive materials Install your system in an operating environment t...

Страница 11: ...Installation ML0 662 85 1 4...

Страница 12: ...provided for each language Use one set for a unit that is installed on the floor as shown below Use the second set if you convert your unit to a table top mounting as described in Appendix C If your u...

Страница 13: ...K THE INSTALLATION AND USER GUIDES FOR THE FIRST TERMINAL TO BE CONNECTED TO YOUR SYSTEM This will be the console terminal 5 USE THE INSTALLATION GUIDE TO UNPACK AND INSTALL THE CONSOLE TERMINAL ML0 6...

Страница 14: ...Installation 6 PULL OFF THE REAR COVER OF YOUR UNIT The cover is held in place by pop fasteners ML0 666 85 1 7...

Страница 15: ...T TO THE POSITIONS LISTED BELOW Set the Halt Enable Disable switch to the disable left position Rotate the Mode switch to the middle language inquiry position Rotate the Baud control switch for the co...

Страница 16: ...Installation 8 CONNECT THE CONSOLE TERMINAL CABLE TO THE CONSOLE TERMINAL AND THE UNIT AS SHOWN LA120 REAR VIEW VT240 IQJ VT220 REAR VIEW 7 J JEiL AEAAV EW J c a a I Jj __ __ 1 __ ML0 668 85 1 9...

Страница 17: ...ditional devices may include terminals printers modems and external storage devices The devices may be connected in any order Thread all cables through the lower cable guide Refer to the installation...

Страница 18: ...Installation 10 IDENTIFY THE POWER CABLE Make sure the power cable plug matches the wall outlet 115 v POWER CABLE 220 v 230 v 240 v ML0 670 85 1 11...

Страница 19: ...CH SETTING TO MATCH THE VOLTAGE SOURCE YOU ARE USING CAUTION An incorrect voltage switch setting will damage your system 115 v IN N AMERICA THE SWITCH IS SET TO 115 v 11 VOLTAGE SWITCH AI 9 220 v 230...

Страница 20: ...Installation 12 SET THE POWER SWITCH ON THE FRONT OF THE UNIT TO 0 OFF 1 13...

Страница 21: ...Installation 13 PLUG IN THE POWER CABLE Do not replace the rear cover at this time Now you are ready to test your system see the next page ML0 673 85 1 14...

Страница 22: ...lecting a language and executing MicroVAX Maintenance System software 14 TURN ON YOUR CONSOLE TERMINAL ML0 67 4 85 If you received RX50 diskettes with this manual proceed with step 15 Ifyou received a...

Страница 23: ...ETTES LABELED MV 1 DIAG CUST RX50 IN THE DISKETTES HOLDER AT THE FRONT OF THIS MANUAL The diskettes are numbered sequentially to show the order of their use 1 16 DISKETIE COVER PROTECTIVE ENVELOPE WRI...

Страница 24: ...ette door by pressing on its outer edge While aligning the orange arrow on the diskette with the orange stripe on the drive insert the diskette Close the diskette drive door Set the power switch to 1...

Страница 25: ...Tape Drive 17 FIND THE TAPE CARTRIDGE LABELED MV 1 DIAG CUST TK50 IN THE CARTRIDGE HOLDER AT THE FRONT OF THIS MANUAL Slide the write protect switch to the down write protected position WRITE PROTECT...

Страница 26: ...D DISK 0 READY BUTTON ON THE CONTROL PANEL TO THE IN POSITION This places the fixed nonremovable disk off line o oomo Roo 0 H oll Find Oiok 0 Wr 1t e f ro tect I 0 OCO K 0 Rr t o r t Rudy ML0 676 85 F...

Страница 27: ...dge release handle to the left CAUTION Never move the cartridge release handle unless the red light is off and the green light is on Never move the cartridge release handle while a light is flashing 3...

Страница 28: ...the in load position The red light goes on When the green light goes on the tape is ready to use CAUTION Never put any object other than a TK50 tape cartridge into the tape drive Handling the mechani...

Страница 29: ...ONSOLE TERMINAL Select the language you wish to use by pressing the corresponding number key and then pressing the RETURN key on the console terminal keyboard 1 22 KA630 A I I DansK 2 Deutsch 3 En lis...

Страница 30: ...ional language capability If you use one of these console terminals the language selection menu does not appear All messages are in English If your console terminal provides international language cap...

Страница 31: ...splays the numbers 7 through 3 indicating comple tion of steps in the power on test The last part of the display contains the numbers 2 through 0 indicating that the system is loading MicroVAX Mainten...

Страница 32: ...esting with diskettes make sure you completed step 16 If you are testing with a tape cartridge make sure you completed step 17 Restart the system by pressing the Restart Run button on the control pane...

Страница 33: ...T CORPORATION Use A Jthorized Dnl P trsuant to a l Jalioj Ri ht to Use License CoPYri ht c 1985 Di lital E uiPment CorPoration The CJ trrent date and time is 14 AUG 1885 08 39 37 00 Press the RETURN k...

Страница 34: ...ne 22 MAKE SURE THE CURRENT DATE AND TIME IN THE INTRODUCTORY DISPLAY ARE ACCURATE IF THE CURRENT DATE AND TIME ARE ACCURATE PRESS THE RETURN KEY TO CONTINUE If the current date and time are inaccurat...

Страница 35: ...PARATION DISPLAY The s stem is PreParin9 for testing This ITl Cl taKe several Minutes P l ease wait ML0 683 85 If you are testing with a diskette proceed to step 24 If you are testing with a tape cart...

Страница 36: ...move the diskette Insert the next disKette in the satrte drive and Press the RETURN Key If YOIJ can not insert the next diskette tYPE 1 and Press the RETURN eY Installation ML0 684 85 Remove diskette...

Страница 37: ...REMOVE THE USED DISKETTE AND INSERT THE NEXT DISKETTE IN THE SAME DRIVE PRESS THE RETURN KEY TO CONTINUE 1 30 NOTE If your MicroVAX II does not request all the diskettes that came with it your system...

Страница 38: ...stallation 26 YOU SHOULD SEE THE READY FOR TESTING DISPLAY ON YOUR CONSOLE TERMINAL PRESS THE RETURN KEY TO CONTINUE The sYsteM is readY for testi nS Press the RETURN Ke l to contin Je ML0 685 8_ 5 1...

Страница 39: ...ce System MAIN MENU display MAIN MENU 1 Test the s ster 2 DisP l aY SYsteM Configuration 1nd OelJices 3 DisPlaY the Utilities Menu a DisPla the Ser l l iCe MefiiJ S EHit Microt Jax Maintenance SYstem...

Страница 40: ...Installation 27 BEFORE TESTING YOUR SYSTEM SAVE THE LANGUAGE YOU SELECTED IN STEP 20 Rotate the Mode switch to the upper right position Replace the rear cover 1 33...

Страница 41: ...in f is re9uired the MicroVAX is readr to be tested Testin f occurs in two Parts the functional tests 91JicK1Y test each de Jice sequentiall i the exerciser test lasting about 4Minutes tests ho1 1 the...

Страница 42: ...EGIN DEVICE TESTS This is a test of all sYstem devi ces identified b Y the dia9 nostic If anY of Your s Ys tem de v i c e s are not listed belowr consult Your trouble s ho otin 9 do cumentation for th...

Страница 43: ...s stem or PerforM more specialize j testing If YOIJ o oul j like Cldditional information consult the Maintenance Section of Your SYstem Technical Manual Press the RETURN ke to return to the Pret l iou...

Страница 44: ...N KEY The MAIN MENU will be displayed MAIN MENU 1 Test the SYstefTl 2 DisPlaY SYsteM Confisuration and Devices 3 DisPlaY the Utilities Menu ll OisPla the Service Menu 5 Exit Microt J ax Maintenance SY...

Страница 45: ...AX MAINTENANCE SYSTEM BY TYPING 5 AND PRESSING THE RETURN KEY The following message should be displayed on the console terminal Exiting MicroVAX Maintenunce SYstem Exit comPlete You maY now load Your...

Страница 46: ...oth the red and green lights flash as the tape is being rewound 2 When the red light goes off and the green light goes on push the cartridge handle to the left and remove the tape cartridge 3 Return t...

Страница 47: ...FOR YOU TO INSTALL OPERATING SYSTEM SOFTWARE FOLLOW THE SOFTWARE INSTALLATION INSTRUCTIONS PROVIDED WITH YOUR SOFTWARE Read the Operation section of this manual to become familiar with MicroVAX II con...

Страница 48: ...Operation 2 This section describes The control panel controls and indicators How to turn on the system How to turn off the system The use of RD52 or RD53 fixed disks RX50 diskettes and TK50 tapes 2 1...

Страница 49: ...ble 2 1 Additional controls and indicators are located on the CPU panel on the rear L of the unit Those controls and indicators are not used for normal system operation They are described in the Micro...

Страница 50: ...on Turns the system off Normal position for software operation Stops normal software operation and puts the CPU in the console mode See the MicroVAX II 630QY 630QZ Manual When the Halt Enable Disable...

Страница 51: ...e to read or write information on the fixed diskif the Ready button is also in the out position In Prevents system software from writing on glows orange the fixed disk You can write protect the disk s...

Страница 52: ...position for software operation System software is free to read information on the fixed disk If the Write Protect button is in the out position system software can also write on the fixed disk Turns...

Страница 53: ...installed install the software as directed in the manual supplied with the software before using the procedure Initial Control Panel and Console Terminal Switch Settings 1 Turn on the console termina...

Страница 54: ...Tape Drive Load Unload Green Light Normal Indication 1 on Glows green Glows green Glows green within 30 seconds Glows red for two seconds and then goes out Lights after red light goes out If you do n...

Страница 55: ...omPleted Loadin f s steM software 2 1 0 ML0 695 85 The terminal should slowly display the numbers 7 through 3 indicating completion of steps in the power on system tests The MicroVAX II performs power...

Страница 56: ...the system software appears on the console terminal after a few seconds The display is described in the manual supplied with the system software If you do not see this sequence of events refer to the...

Страница 57: ...system shut down procedure described in your system software manual That procedure will insure an orderly system shut down that will prevent accidental loss of data 2 Turn the system off by setting th...

Страница 58: ...rmation As a general rule Make backup copies on diskettes or magnetic tape Make a daily backup copy of all information you create or change that day Make a weekly backup copy of all information stored...

Страница 59: ...RD53 fixed disk drive is located inside the cabinet Information is stored on fixed nonremovable disks The RD52 fixed disk stores up to 31M bytes of data The RD53 fixed disk stores up to 71M bytes of...

Страница 60: ...disk drive holds two 5 25 inch diskettes Each diskette stores 400 kilobytes 400K bytes of information which is roughly 150 typewritten pages An indicator light on each drive lights when the drive is...

Страница 61: ...0 diskette Information stored previously can be erased and new information stored in its place The diskette rotates inside its cover The diskette is cleaned continuously by the soft fabric lining of t...

Страница 62: ...DISKETTE COVER ORANGE ARROW PROTECTIVE ENVELOPE Operation WRITE PROTECT NOTCH ML0 697 85 2 15...

Страница 63: ...diskette Writing on the diskette might damage the diskette Keep diskettes away from direct sunlight heaters and other sources of heat Keep diskettes away from magnets and equipment that generate magn...

Страница 64: ...a diskette cover the write protect notch with one of the self adhesive foil tabs supplied with your diskettes This procedure is known as write protecting the diskette You can later add or change info...

Страница 65: ...en the diskette door by pressing on its outer edge 2 Align the orange arrow on the diskette with the orange stripe on the drive and insert the diskette L 3 After inserting the diskette press the drive...

Страница 66: ...ge Each tape cartridge holds 94 5 megabytes 94 5M bytes of information Information is stored magnetically Information is stored on only one side of the tape The tape cartridge must be inserted correct...

Страница 67: ...ummarizes the operation of the TK50 tape drive Load Unload button and indicator lights and the tape cartridge release handle 2 20 U 1 TKSO LOAD UNLOAD BUTTON RED LIGHT TK50 CARTRIDGE RELEASE HANDLE GR...

Страница 68: ...t Light Off Off On Off Function Loads the tape 10 15 seconds If a tape is already in place when the power is turned on rewinding and loading may take up to two minutes Rewinds and unloads the tape Con...

Страница 69: ...wer on self test is occurring Cartridge is inserted but handle is still ieft Tape is loading or unloading Tape is stopped Tape loaded successfully Tape is in motion except rewind Read write commands a...

Страница 70: ...rapidly Position Left Right There is a fault Press and release the Load Unload button four times If the problem persists do not attempt to use the tape drive or to remove the tape cartridge Call your...

Страница 71: ...identification on the label Insert the label in the slot on the front of the cartridge Do not apply stick on labels to the top bottom or sides of the cartridge Do not write on the tape cartridge with...

Страница 72: ...ape Cartridge Write protecting a tape cartridge prevents accidental erasure of information stored on the tape Slide the write protect switch to the down write protected position WRITE PROTECTED NOT WR...

Страница 73: ...cartridge Place the label only in the label slot on the front of the tape cartridge Store tape cartridges in a dust free environment Keep tape cartridges away from direct sunlight heaters and other s...

Страница 74: ...drive power on self test The red light goes off and the green light goes on indicating that it is safe to move the cartridge release handle 1 Push the cartridge release handle to the left 2 With the a...

Страница 75: ...ndle to the right The red light goes off The green light goes on 4 Push the Load Unload button to the in load position The red light is on The green light goes off 2 28 LOAD UNLOAD BUTTON __ __ ______...

Страница 76: ...tely two minutes The green light flashes rapidly and irregularly during calibration CAUTION Never move the cartridge release handle unless the red indicator light is off and the green indicator light...

Страница 77: ...When the tape is completely rewound in the cartridge the red light goes off and the green light goes on 2 Push the cartridge release handle to the left NOTE Rewinding a tape can also be done under so...

Страница 78: ...problems and what to do 3 Power on messages A list of indications that appear when the system is turned on and what they mean The MicroVAX Maintenance System This portion is divided into two parts Th...

Страница 79: ...wer switch is turned on switch is not lit 3 2 Possible Cause System is not plugged in No power at the wall outlet System circuit breaker is in the out position Corrective Action Set the power switch t...

Страница 80: ...Troubleshooting ML0 704 85 3 3...

Страница 81: ...stem Set the power switch to 1 Power is on 1 0 switch Console terminal is off Turn the terminal on is lit but there is no Console terminal is Put the terminal on line display on the console off line R...

Страница 82: ...ate system and the settings are the same terminal do not match Refer to the Installation Mode switch on the CPU panel is set to T section of this book Refer to step 7 and step 27 in the Installation c...

Страница 83: ...et to the enable position Ready button is in No system software on the disk Corrective Action The system is in console mode To exit console mode set the Halt Enable Disable switch to the disable left...

Страница 84: ...kette is not startable does not contain a bootstrap program Diskette is worn or damaged Troubleshooting Corrective Action Insert a diskette containing startable system software in the diskette drive C...

Страница 85: ...otected Press and release Write Protect button Diskette read error No diskette in the Insert a diskette in the message is displayed diskette drive drive Diskette drive door is Close the diskette drive...

Страница 86: ...wn Diskette is not formatted Diskette is worn or damaged Diskette is write protected Troubleshooting Corrective Action Insert a diskette in the drive Close the diskette drive door Check that the orang...

Страница 87: ...trap program to bootstrap program start system software Tape is worn or Try another tape damaged cartridge System halts Break key on the Power on system again unexpectedly during console terminal was...

Страница 88: ...oubleshooting Corrective Action Insert the tape and press the Load Unload button Press the Load Unload button four times If the problem persists do not attempt to use the tape drive or to remove the t...

Страница 89: ...Tape is not inserted properly Load Unload switch is in the Load in position Corrective Action Reinsert the tape cartridge If the problem L persists call your service representative Make sure the Load...

Страница 90: ...will progress from F to 0 as listed in Table 3 1 If the display stops in the range ofF to 3 there may be a hardware error in the system Refer to the MicroVAX II 630QY 630QZ Technical Manual If the di...

Страница 91: ...register accesses Q22 Bus A Testing QxSS video console display if present 9 Identifying console terminal 8 Language inquiry or CPU halted 7 Running data tests on RAM memory 6 Running address tests on...

Страница 92: ...ord the results The maintenance system software is stored on RX50 diskettes or on a TK50 magnetic tape cartridge You run the maintenance system programs using the console terminal for command inputs a...

Страница 93: ...IN MENU Test the SYSteM DisPlaY SYsteM Confi uration and Devices 3 DisPlaY the Utilities Menu lJ DisPla the Service Menu S Exit Microt Jax Maintenunce s stem TYPe the nuMber then Press the RETURN Key...

Страница 94: ...SYSTEM CONFIGURATION AND OE ICES SYSTEM CONFIGURATION CPUA Mic roVA CPU KAG30 AA 1MB FPU MC OO HW OO MEMA MicroVAX rtleMorY sYsterr1 5 l le9 abYtes 10240 Pases KAG30 CPU mod1Jle 1MB on boar d meMory M...

Страница 95: ...grams This option is reserved for future use by DIGITAL 4 Display the service menu if you have purchased the MicroVAX maintenance kit The service option is for qualified service personnel only see the...

Страница 96: ...Upgrade 4 As you upgrade your system insert your documentation here for future use 4 1...

Страница 97: ......

Страница 98: ...ocomputer Interfaces Handbook Microcomputers and Memories Handbook Software Documentation MicroVMS User s Manual V4 0 ULTRIX 32m Installation Guide VAXELN User s Guide These documents can be ordered b...

Страница 99: ...L L...

Страница 100: ...tion of MicroVAX II systems allows for multiple terminals that can be installed on more than one floor of a building or in more than one building DIGITAL Customer Service personnel are available to he...

Страница 101: ...ppendix Use one 15 amp dedicated circuit for the MicroVAX system unit Use another 15 amp dedicated circuit for the console terminal and additional devices 8 2 NOTE Your terminal and printer might be d...

Страница 102: ...Line voltage Voltage tolerance Power source phasing Frequency Line frequency tolerance Running current typical Running current maximum Power consumption maximum switchable for input voltage Specificat...

Страница 103: ...Operating 2 4km 8000 ft 10 40 c 50 104 F 11 o C hour 20 Flhour 20 80 Nonoperating 4 9km 16000 ft 40 66 c 40 151 oF 10 95 Reduce the maximum temperature specification by 1 8o C for each 1000 meter 1 o...

Страница 104: ...PE 6 0 bels 5 9 bels LPAt 45 dB 44dB LNPE Noise power emission level measured in bels 1 bel 10 dB t LPA Sound pressure level measured in dB at the front bystander position 1 0 meter from the front edg...

Страница 105: ...MicroVAX II Specifications System Unit Physical Specifications B 6 TABLE TOP MODEL 29 5 KG 65 LB FLOOR STAND MODEL 31 75 KG 70 LB RACK MOUNT MODEL 24 KG 53 LB 16 2 CM 6 IN ML0 709 85 L...

Страница 106: ...s Per sector 1 logical block Performance Average seek time Average rotational latency Average access time Transfer rate Physical Specifications Height Width Depth Weight When operating with RQDX2 cont...

Страница 107: ...cording density 6667 bits in Number of tracks 22 Storage Capacity Unformatted 132 0M bytes Formatted 94 5M bytes Performance Tape start time 300 msec maximum Tape speed 75 in sec Streaming data rate 5...

Страница 108: ...tes User capacity blocks 60 480 blocks Performance Average seek time 49 00 msec Average rotational latency 8 33 msec Average access time 57 33 msec Transfer rate 184 32K bytes sec Physical Specificati...

Страница 109: ...ce Average seek time Average rotational latency Average access time Transfer rate Physical Specifications Height Width Depth Weight When operating with RQDX2 controller B 1 0 71 303 168 bytes 70 987 7...

Страница 110: ...is appendix tells you how to convert the MicroVAX II system unit from the floor stand version as shipped by DIGITAL to a table top version 1 REMOVE THE FRONT AND REAR COVERS 2 INSTALL FOUR RUBBER FEET...

Страница 111: ...Table Top Conversion Procedures 3 REMOVE THE FOUR SCREWS AT THE BASE OF THE UNIT ML0 711 85 L C 2...

Страница 112: ...Table Top Conversion Procedures 4 REMOVE THE FOOT STAND FROM THE UNIT AND PLACE THE UNIT ON A TABLE WARNING Use two people The unit weighs 60 kg 65 lb FOOT STAND ML0 71 2 85 C 3...

Страница 113: ...Table Top Conversion Procedures 5 REPLACE THE FRONT AND REAR COVERS Now go to step 3 of the installation procedure page 1 5 L ML0 713 85 C 4...

Страница 114: ...AND PRINTER OPTIONS You can use any DIGITAL video or hard copy terminal and any LA series printer with MicroVAX II systems The MicroVAX II system supports terminals and printers that meet EIA standar...

Страница 115: ...e following communication options are available for MicroVAX II systems Maximum Transmission Model Speed Mode Lines DMA DEQNA 10M bits sec Ethernet 1 Yes block mode DHVll 38 400 bits sec Asynchronous...

Страница 116: ...of making copies of the data stored in your disk drive s so that you can recover that data after an accidental loss You make these copies on RX50 diskettes or TK50 magnetic tape cartridges and then st...

Страница 117: ...um A fixed disk diskette or magnetic tape containing software such as an operating system that the bootstrap program can load into the MicroVAX system memory Bootstrap A program that you start when yo...

Страница 118: ...rd and one quarter of the size of a MicroVAX II longword Central processing unit CPU The part of a MicroVAX II system that controls the interpretation and execution of instructions In the MicroVAX II...

Страница 119: ...croVAX II component usually a printed circuit board that regulates the operation of one or more peripheral devices Controllers are often called interface units Control panel The area on the front of t...

Страница 120: ...and Controller Device name The name by which a device or controller is identified within a MicroVAX II system You use the device name to refer to that device when communicating with the system Diagnos...

Страница 121: ...in a square paper envelope Diskette drive The device that holds one or more RX50 diskettes See Disk drive EIA Electronic Industries Association Error message A message displayed by the MicroVAX II to...

Страница 122: ...ords and erases data Also called read write head Input device A piece of equipment used to transfer data into the MicroVAX II A keyboard is an input device Input Output 1 0 device A piece of equipment...

Страница 123: ...nary thousand or 2 to the lOth power 1024 in decimal notation K byte Abbreviation for kilobyte Kilobyte 1024 bytes LED Light emitting diode LEDs are used as indicator lights on the control panel A seg...

Страница 124: ...pacity of a computer the symbol that means a binary million or 2 to the 100th power 1 048 576 in decimal notation Magnetic tape A long strip of plastic coated with magnetic oxide used for storing data...

Страница 125: ...ts that are in direct communica tion with the MicroVAX II system Operating system A collection of programs that controls the overall operation of a MicroVAX II and performs such tasks as Assigning pla...

Страница 126: ...evice that provides paper copies of information stored in a MicroVAX II Program The complete sequence of instructions necessary for a MicroVAX II to perform a task See Software Prompt A character or w...

Страница 127: ...roVAX II system to perform a chosen or required function Compare hardware Software package A set of related programs that performs a specific task Storage medium Any device capable of recording inform...

Страница 128: ...two basic categories video and hard copy Video terminal A terminal that displays information on the screen of a cathode ray tube CRT Compare hard copy terminal Word A word is 16 bits long Write protec...

Страница 129: ......

Страница 130: ...tal Equipment Corporation Accessories Supplies Center 632 Caribbean Drive Sunnyvale CA 94086 Digital Equipment Corporation Accessories Supplies Center P O Box CS2008 Nashua NH 03061 Prepaid orders fro...

Страница 131: ......

Страница 132: ...d Please make suggestions for improvement Did you find errors in this manual Ifso specify the error and the page number Please indicate the type of user reader that you most nearly represent _ Assembl...

Страница 133: ...L FIRST CLASS PERMIT N0 33 MAYNARD MASS POSTAGE WILL BE PAID BY ADDRESSEE DIGITAL EQUIPMENT CORPORATION CUP ML PUBLICATIONS ML05 5 E45 146 MAIN STREET MAYNARD MA 01754 2571 NO POSTAGE NECESSARY IF MAI...

Страница 134: ...l l lllll xx t x...

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