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Making backup copies, Write-protecting diskettes

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Slide the diskette into the drive until it clicks into place. To remove a diskette, press the release button to release the diskette. When it pops out of the drive, pull out the diskette and store it properly, such as in a special diskette container. WARNING Never remove a diskette or turn off the computer while the drive indicator light is on. You could lose data. Also be sure to remove all diskettes before you turn off the computer. Making backup copies Make copies of all your data and system diskettes. Copy all diskettes that contain programs, as you did the master system diskettes that come with the Equity LT, and use only the copies. Store your original system diskettes in a safe place away from your working diskettes. Copy your data diskettes regularly (preferably every day) to keep them up-to-date, and store them away from your originals. Chapter 1 describes how to make a backup copy of your MS-DOS and reference diskettes. For general instructions on copying diskettes, see Chapter 4. If you have a hard disk, keep backup copies of all your program files on diskettes and regularly copy important data files to diskettes as well. You can use the MS-DOS BACKUP command to copy all or part of the files on the hard disk. For more information, see your MS-DOS manual. Write-protecting diskettes You can write-protect a diskette to prevent its data from being altered. When a diskette is write-protected, you can copy data from it, but you cannot store new data on the diskette or delete any files it contains. If you try to change data stored on a write-protected diskette, an error message displays. Using the Equity LT 3-13

Section	Page
FRONT MATTER	1
CONTENTS	8
INTRODUCTION	13
How to Use This Manual	14
CHAP 1-SETTING UP YOUR SYSTEM	16
Unpacking	16
Connecting the Screen	17
Connecting the AC Adapter	20
Charging the Battery	21
Connecting a Printer	21
Parallel interface	22
Serial interface	24
Setting the DIP Switches	25
Keyboard DIP switches	26
Back panel DIP switches	28
Turning On the Computer	29
Safety rules	29
Turning on the power	30
Adjusting screen contrast and brightness	31
Initial screen display	32
Loading MS-DOS	32
Copying System Diskettes	34
Copying with two diskette drives	34
Copying with one diskette drive	35
Running the Setup Program	37
Setting the real-time clock	38
Changing the backlight period	39
Changing the serial port (RS-232C) settings	40
Leaving the Setup program	43
CHAP 2-PREPARING A HARD DISK FOR USE	44
Creating the MS-DOS Partition	45
Formatting the MS-DOS Partition	46
Copying the Reference Files to the Hard Disk	48
Booting From the Hard Disk	48
Drive Assignments	49
Hard Disk Power Switch	49
CHAP 3-USING THE EQUITY LT	50
Using the AC Adapter	50
Using the Battery	50
LED Indicators	52
Opening and Closing the Screen	53
Using the Handle	54
Selecting Execution Speed	54
Resetting the Computer	55
Caring for the Backlit Screen	56
Special Keys on the Equity LT Keyboard	56
The Equity LT Character Set	58
Using Disks and Disk Drives	58
How disks work	58
Choosing diskettes for the Equity LT	59
Caring for disks and disk drives	60
Inserting and removing diskettes	61
Making backup copies	62
Write-protecting diskettes	62
Using a single diskette drive	63
Turning Off the Computer	64
CHAP 4-USING MS-DOS WITH THE EQUITY LT	65
Starting and Exiting MS-DOS	66
Entering MS-DOS Commands	67
Storing Data	68
Changing the Default Drive	69
Formatting Diskettes	70
Formatting with two diskette drives	70
Formatting with one diskette drive	71
Copying Data	72
Using the DISKCOPY command	72
Copying with two 3 1/2-inch diskette drives	72
Copying with one 3 1/2 -inch diskette drive	73
Copying with one 5 1/4-inch diskette drive	75
Using the COPY command	76
Listing the Contents of a Diskette	78
Creating and Using Subdirectories	78
Creating subdirectories	79
Changing directories	80
Using pathnames	81
Copying from one subdirectory to another	82
Starting an Application Program	82
MS-DOS Commands and the Equity LT	83
Using the backlit screen with memory resident programs	83
APPENDIX A-OPTIONS AND MAINTENANCE	84
Connecting a Color Monitor	84
Replacing the Backlit Screen Element	85
Turning Off the Hard Disk	92
Turning off the hard disk first	92
Turning off the hard disk later	92
APPENDIX B-TROUBLESHOOTING	95
Error Messages	95
The Computer Fails to Start Up	95
The LCD Screen is Blank	96
The Monitor Screen is Blank	96
The Computer Does Not Respond	97
Low Battery Problems	97
Diskette Problems	98
Hard Disk Problems	99
Software Problems	99
Printer Problems	100
APPENDIX C-POWER-ON DIAGNOSTICS	101
System Device Check	101
Clock and CMOS RAM Check	102
RAM Check	102
Keyboard Controller and Keyboard Check	103
Floppy Disk Drive Seek Check	103
Hard Disk Controller and Hard Disk Check	104
APPENDIX D-PERFORMING SYSTEM DIAGNOSTICS	105
Starting System Diagnostics	105
Selecting a Test	106
Resuming From an Error	107
System Board Check	108
Memory Check	108
Keyboard Check	109
Video Adapter and Display Check	110
Video adapter check	111
Attribute check	112
Character set check	112
40-column character set check	113
320 x 200 graphics mode check	113
640x 200 graphics mode check	114
Screen paging check	115
Color video check	116
Sync check	116
Run all above checks	116
Floppy Disk Drives and Controller Check	117
Formatting a diskette	117
Starting the floppy disk drive check	118
Sequential seek check	119
Random seek check	119
Write, read check	119
Speed check	120
Run all above checks	121
Parallel Port (Printer Interface) Check	121
Serial Port (RS-232C) Check	121
Alternate Serial Port Check	123
Dot-matrix Printer Check	123
Hard Disk Drive and Controller Check	124
Seek check	125
Error detection and correction check	126
Read, verify check	126
Run all above checks	127
Exiting System Diagnostics	127
Error Codes and Messages	128
APPENDIX E-EQUITY LT SPECIFICATIONS	130
CPU and Memory	130
Controllers	130
Interfaces	130
Power Supply	131
Mass Storage	131
Keyboard	131
Environmental Requirements	131
Physical Characteristics	132
Power Requirements	132
Options	132
GLOSSARY	133
INDEX	142