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EQUlTY™LT User’s Guide Y16499100301.
IMPORTANT SAFETY INSTRUCTIONS 1. Read all of these instructions and save them for later reference. 2. Follow all warnings and instructions marked on the product. 3. Unplug this product from the wall outlet before cleaning. Do not use liquid cleaners or aerosol cleaners.
10. If an extension cord is used with this product, make sure that the total of the ampere ratings on the products plugged into the extension cord do not exceed the extension cord ampere rating. Also, make sure that the total of all products plugged into the wall outlet does not exceed 15 amperes.
EPSON ® Equity™ LT User’s Guide.
IMPORTANT NOTICE DISCLAIMER OF WARRANTY Seiko Epson Corporation makes no representations or warranties, either express or implied, by or with respect to anything in this manual, and shall not be liable for any implied warranties of merchantability and fitness for a particular purpose or for any indirect, special, or consequential damages.
FCC COMPLIANCE STATEMENT FOR AMERICAN USERS This equipment generates and uses radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instruc- tions, may cause interference to radio and television reception.
User’s Guide.
Contents Introduction. ........................... 1 How to Use This Manual .................. 2 1 Setting Up Your System ...................... 1-1 1 Unpacking. ................................. 1-1 2 Connecting the Screen ....................... 1-2 3 Connecting the AC Adapter.
3 Using the Equity LT ......................... 3-1 Using the AC Adapter .......................... 3-1 Using the Battery ............................... 3-1 LED Indicators ................................. 3-3 Opening and Closing the Screen. ........
Creating and Using Subdirectories ................ 4-14 Creating subdirectories ....................... 4-15 Changing directories ......................... 4-16 Using pathnames ............................ 4-17 Copying from one subdirectory to another .
D Performing System Diagnostics ............... Starting System Diagnostics ...................... Selecting a Test. ................................ Resuming From an Error ........................ System Board Check ............................ Memory Check .
E Equity LT Specifications ..................... CPU and Memory .............................. Controllers ..................................... Interfaces ...................................... Power Supply. .................................. Mass Storage .
Introduction Your Epson® Equity™ LT portable computer is a compact high-performance system you can use just about anywhere: at the office, at home, or on the road. Its rechargeable battery lets you use it in remote locations when you don’t have access to an electrical outlet.
The Equity LT comes with the MS-DOS operating system and the GW-BASIC programming language. If you have used MS-DOS before on another computer, you’ll find that it works the same on the Equity LT.
Appendix C provides information on the power-on diagnostics in case your computer has trouble powering up. Appendix D outlines the system diagnostic checks you can perform on your computer. If you are having trouble with any part of the hardware, you may want to run some or all of these diagnostic checks.
Chapter 1 Setting Up Your System Setting up your Epson Equity LT portable computer is easy. Just follow the steps in this chapter. They describe how to set up your computer, copy the system diskettes that come with your Equity LT, and run the initial Setup program on your reference diskette.
Besides this manual, you should have the following items: l The computer l AC adapter and power cord l An MS-DOS operating system diskette (version 3.20), which also contains the GW-BASIC programming language l A reference diskette l An MS-DOS manual and a GW-BASIC manual.
2. Use a flat blade screwdriver to lift off the plastic cover the front of each arm, as shown below. Set the covers aside. on 3. There is a plastic insert cap inside each of the arms; lift it out as shown below. You may want to keep these caps in case you need to store or ship your computer later.
4. Pick up the screen with both hands and insert it into the arms of the computer. 5. When the screen is securely seated in both arms, replace the plastic covers on the front of the arms by snapping them back into place. These secure the screen to the computer.
3 Connecting the AC Adapter Follow these steps to connect the AC adapter: 1. Insert the round end of the adapter cable into the jack marked AC ADAPTER on the back panel of the computer. 2. Connect one end of the power cord to the adapter’s input socket.
3. Plug the other end of the power cord into a 120 volt electrical wall outlet. When the adapter is connected to both the computer and an electrical outlet, the AC power indicator light turns on. This light is a convenient way to verify that the AC adapter is providing power to the computer.
Parallel interface The Equity LT parallel interface is Centronics-compatible and uses a DB-25S connector. Most Epson printers have parallel interfaces. To connect a printer to the computer, you need an IBM- compatible printer cable. If you are not sure which one you need, consult your Epson dealer.
4. Connect the other end of the cable to the printer as shown below. To secure the cable, squeeze the clips at each side of the printer connector and click them into place.
Serial interface If you have a printer or another peripheral with a serial interface, connect it to the serial (RS-232C) port at the back of the computer. The Equity LT uses a DB-9P connector, so be sure you have an IBM AT-compatible cable (or an adapting cable that converts the 9-pin output to the standard 25-pin output).
Note If you plan to connect a color monitor or an external diskette drive to your computer, do it at this point. For instructions on connecting the monitor, see Appendix A, “Options and Maintenance.” For instructions on connecting an external drive, see the instructions that came with the drive you bought.
A DIP switch is either on (up) or off (down). To change a setting, use a hard, thin object, such as a small screwdriver. Keyboard DIP switches To access the DIP switches above the keyboard, you need to open the cover shown below. DIP switch cover I Press the raised tab back and lift up at the same time to expose the DIP switches.
The system functions controlled by these switches are listed in Table l-l and then described below. Table 1-1. Keyboard DIP switch functions Switch 1, LCD reverse or normal- This switch tells your computer whether to display text on the screen in normal mode or reverse.
Back panel DIP switches The second set of DIP switches are on the left side of the back panel. The system functions controlled by these switches are listed in Table 1-2 and then described below.
Switch 2, external drive assignment-If you have connected an external diskette drive to the computer, this switch determines whether MS-DOS and your application programs access the drive as drive A or drive B.
l Never turn off your computer while a disk drive light is on. This can destroy data stored on disk or make a whole disk unusable. l Always wait at least five seconds after you turn the power off before you turn it on again. Turning the power off and on rapidly can damage the computer’s circuitry.
The power indicator above the keyboard lights up, and after a few seconds, the computer begins to perform an internal self test. This is a diagnostics program the computer runs whenever you turn it on.
If your screen is the backlit model, you can use the brightness switch to adjust the intensity of the backlighting. To make the backlighting brighter, move the switch up.
2. Insert the diskette into the drive until it clicks into place. When the diskette is all the way in, the release button pops out. (For more instructions, see “Inserting and removing diskettes” in Chapter 3.) 3. Press any key. The computer automatically loads the operating system.
The screen displays the MS-DOS version number and copyright information, and then the MS-DOS command prompt: A> This means the operating system is ready for you to enter a command. The command prompt identifies the current operating drive: A, B, or C.
3. Type: DISKCOPY A: B: and press Enter. The screen displays these prompts: Insert SOURCE diskette in drive A: Insert TARGET diskette in drive B: Press any key when ready . . . 4. Drive A already contains the diskette you want to copy (the source) and drive B contains the blank diskette (the target), so just press any key.
Insert SOURCE diskette in drive A: Press any key when ready . . . 3. Drive A already contains the diskette you want to copy (the source), so just press any key.
6. Remove the MS-DOS system diskette from drive A and insert the copy diskette in the drive. Then press any key. The program copies the remaining files from the computer’s memory to the copy diskette. When the copy is complete, you see this prompt: Copy another diskette (Y/N)? 7.
and press Enter. The Setup menu displays on the screen: Exit Real-time clock Backlight period Primary serial port Secondary serial port 1 select function, Enter exit program Setting the real-time clock Your computer automatically keeps track of the time and date using a real-time clock.
Enter the time in the exact form shown in the box, using two digits for each part; the program automatically inserts the colons (:). For example, to set the time for 3:15 pm, enter the following: 151500 When the time is correct, press Enter.
of time. The default time period is two minutes. You can change it to a time between one-half minute to five minutes, in half-minute increments. If you do not want the backlighting to be turned off at all, select no time limit so it remains on unless you turn off the computer.
If you are using only the built-in serial port, you need to be concerned only with the primary serial port-and only then if you want to change the default parameters for communication.
The cursor block is on the Baud rate option. To change the speed of communication, press Enter. The screen displays the following: 110 bps 150 bps 300 bps 600 bps 1200 bps 2400 bps 4800 bps 9600 bps 19200 bps 38400 bps Use 1 and t to move the cursor block to the desired communication speed and press Enter.
Leaving the Setup program When you finish using the Setup program, press t until the cursor block is on Exit and press Enter. The screen displays a list of the current settings you just made. Check the list to make sure all the information is correct.
Chapter 2 Preparing a Hard Disk for Use If you have the hard disk model Equity LT, follow the instructions in this chapter to prepare it before using it for the first time.
Then you can use the COPY command to copy files from the reference diskette to the hard disk. All of these procedures are described in this chapter. Note If you plan to use an operating system other than MS-DOS, you need to use that operating system to partition the hard disk and copy the system files to it.
6. Press Y to use the entire hard disk for MS-DOS and press Enter. The screen displays the following message and prompt: System will now restart Insert DOS diskette in drive A: Press any key when ready . . . 7. Press any key to restart the system (the MS-DOS diskette is already in drive A).
Note 001 and US are the country code and keyboard code, respectively, for the United States. If you want to substitute other codes, see your MS-DOS manual. The screen displays this message and prompt: SELECT is used to install DOS the first time. SELECT erases everything on the specified target and then installs DOS.
When all the files are copied, the A> prompt redisplays. The SELECT procedure is complete. Note The SELECT procedure described above copies all the files from your system diskette to the root directory of drive C. You may, however, want to store these files in separate subdirectories so they are easier to find.
Turn off the computer, wait at least five seconds, and then turn it back on. After the computer completes the power-on self test, the screen displays the date prompt. Press Enter twice to accept the date and time shown. The C> prompt displays, indicating that the system has successfully loaded from your hard disk.
Chapter 3 Using the Equity LT This chapter covers some basic procedures for using your Equity LT computer. Using the AC Adapter The Equity LT can be powered by either its internal battery pack or the AC adapter. When you connect the AC adapter to the computer and to an electrical outlet, the power to the computer is supplied by the outlet.
You need to recharge the battery at these times: l Before you use the computer for the first time l If the battery has not been used for a long time l If the low battery indicator light starts flashing (see “LED Indicators” below). After the low battery light starts to flash, you have a maximum of 15 minutes before the power is completely gone.
LED Indicators Above the keyboard on the right side are seven LED (light emitting diode) indicators that provide information about the computer’s operation. The POWER LED is on whenever the computer is on. The color of the light indicates the current execution speed.
Opening and Closing the Screen When you are not using the computer or you want to move it, turn it off and then close the screen, as shown below, so it locks into the bottom part of the computer. When you want to open the screen, slide the latch release button on either side (shown below) toward you.
Using the Handle The Equity LT has a convenient carrying handle. To use the handle, pull it out from the bottom of the computer as shown below. Be sure the screen is closed whenever you carry the computer by its handle. Selecting Execution Speed The Equity LT can operate at two execution speeds: 4.
When the computer is running at 4.77 MHz, the power LED is orange. At 10 MHz, the light is green. Resetting the Computer You can reset the computer to reload the operating system or to restart a program. You may also need to reset if an error occurs and the computer does not respond to anything you type.
3. Turn off any peripheral devices and then turn off the Equity LT. Wait five seconds and then switch the power back on. Caring for the Backlit Screen If you have the backlit model of the LCD screen, you need to be aware of a few things.
Table 3-1. Special keys Key n- -n Caps Lock Shift Ctrl Alt 4- Enter Ins Del Home, End, ‘;“Uk Pgpn, + Num Lock Esc F1 - F10 Prtsc Sys Req Scroll Lock Break Purpose Moves the cursor one tab to the right in normal mode and one tab to the left in Shift mode.
The Equity LT Character Set The Equity LT uses an extended character set that assigns graphics and international characters to some ASCII codes. In some cases, if you try to print these characters on a standard printer, you get italic characters instead.
stores the data you enter as magnetic patterns on these circular tracks. A small read/write head in the disk drive interprets the magnetic patterns. When a diskette is in a drive, the metal plate above the access area moves aside to expose the diskette surface to the read/write head.
You need to format new diskettes before you can use them with an operating system. Formatting erases all the data on a diskette and prepares it to receive new data, so be sure to format only new blank diskettes or diskettes that contain data you want to erase.
l Never wipe, brush, or try to clean diskettes in any way. l Store diskettes properly in their plastic cases. If your computer has a hard disk, take these additional precautions: l Never turn off the power to the computer or the hard disk when the hard disk drive light is on.
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.
The write-protect device is a small switch on the lower-right corner on the back, shown in the figure below. To write- protect the diskette, slide the switch down toward the edge of the diskette so there is a hole where the switch used to be.
Turning Off the Computer Before you turn off your computer, save your data, exit the program you are using, and then remove all diskettes from the disk drives. Turn off any peripherals (such as a printer, a monitor, or an external diskette drive), and then turn off the computer.
Chapter 4 Using MS-DOS With the Equity LT Your Equity LT comes with version 3.2 of MS-DOS, the disk operating system by Microsoft? In this chapter, you’ll learn some of the basic procedures for using MS-DOS with your computer.
l Enter an MS-DOS command l Store data l Change the default drive l Format a diskette for storing data l Copy an entire diskette or selected files l List the contents of a diskette l Create and use subdirectories l Start an application program.
Now you see the MS-DOS command prompt, which tells you that MS-DOS is loaded and indicates the current drive followed by a greater-than symbol: A> If MS-DOS loads from the hard disk, the screen displays: c> This prompt tells you that you can now enter commands to instruct MS-DOS to perform tasks and run application programs.
If you press Enter when a command line has an error in it, you see this message: Bad command or file name Then MS-DOS re-displays the command prompt so you can try again. Just type the correct command line and press Enter. Storing Data All your work and programs are stored in files on your diskettes or hard disk.
as its name, size, location, and the date and time you last updated the file. If you do not create any other directories on your diskette, you will always be working in the root directory. This is often the case when using a diskette rather than a hard disk.
Formatting Diskettes Before you can store data on a new diskette, the diskette must be formatted. Formatting prepares the diskette so MS-DOS can write to it. You need to do this only once, before you use the diskette for the first time. You can also reformat previously used diskettes.
4. When the diskette is completely formatted, you see messages such as these (for a 720KB diskette): Format complete 730112 bytes total disk space 730112 bytes available on disk Format another (Y/N)? At this point, you can either press Y and Enter to format another diskette, or press N and Enter to return to the MS-DOS system prompt.
Copying Data It’s very important to have backup copies of the files you create on your diskettes or hard disk. You can copy data and program files several ways: you can back up an entire diskette using the DISKCOPY command, or you can back up individual files using the COPY command.
and press Enter. MS-DOS prompts you to insert your diskettes: Insert SOURCE diskette in drive A: Insert TARGET diskette in drive B: Press any key when ready . . 4. Insert the diskette you want to copy from in drive A and the diskette you want to copy to in drive B.
MS-DOS displays these messages: Insert SOURCE diskette in drive A: Press any key when ready . . . 4. If the MS-DOS diskette is in drive A, remove it. Then insert the diskette you want to copy from in the drive and press any key. DISKCOPY copies the contents of the diskette to the computer’s memory.
6. When the copy is completed, you see this message: Copy another diskette (Y/N)? Your diskette has now been copied and you can either make another copy or leave the DISKCOPY command.
5. Remove the diskette from drive B and insert the blank diskette in the drive. DISKCOPY checks to see if the new diskette is formatted. If it is not, DISKCOPY formats the diskette. You see the message: Formatting while copying The copy operation begins when the format is complete.
l If an existing file on the target diskette has the same name as the file you are copying from the source diskette, the copy replaces the file on the target diskette. Because there is no warning that the file on the target diskette is being replaced, be very careful that you do not accidentally erase a file you want to keep.
Listing the Contents of a Diskette You will often want to see which files are stored on your diskettes or hard disk. For example, before you format a used diskette and erase its contents, always check the contents of the diskette to be sure you will not erase any valuable files.
l Copying from one subdirectory to another. Each subdirectory has a name, and any file in any subdirectory can be identified and accessed using a pathname. The root directory is always designated by a backslash (). The name of the subdirectory can have up to eight characters, using letters or numbers or both, but not punctuation marks.
Press F6. Then type the following and press Enter at the end of each line: COPY CON: MEMOS MEMO1 This is the first memo. Press F6. Now you have one file in each of the subdirectories. (The COPY command with CON: copies what you enter from the keyboard to a file.
Type DIR and press Enter to show that you are now in the LETTERS subdirectory. You should see the following: <DIR> LETTER1 <DIR> Now you can use the LETTER1 file. For example, to display the contents of the file on the screen, type the following and press Enter: TYPE LETTER1 You should see the following: This is the first letter.
subdirectories just as you have to specify the drive or log onto a different drive to access files on different disks. Copying from one subdirectory to another You can also copy files from one subdirectory to another with the COPY command.
MS-DOS Commands and the Equity LT Your MS-DOS manual describes all the commands on the MS-DOS diskette that you can use on the Equity LT. Three commands described in the manual are not on your MS-DOS diskette: HELP, ROMBIOS, and SYSTAT. These files are on your reference diskette.
Appendix A Options and Maintenance This appendix describes how to connect a color monitor to the computer and how to replace the backlit screen element.
If the plug has retaining screws, tighten them with a screwdriver. 5. If necessary, plug the monitor’s power cable first into the power inlet on the monitor. (Some monitors come with permanently attached power cables.) Then plug the power cable into an electrical outlet.
Set the switch tops aside in a safe place. 3. Use the screwdriver to remove the plastic cover on each of the arms that hold the screen, as shown below.
5. Turn the screen over and lay it on a flat surface (such as a table) so you are looking at the back. Locate the small plastic screw cover on each side of the screen, near the bottom. As shown below, use a small screwdriver to lift out each of the covers.
8. Carefully lift off the front cover of the screen as shown below and set it aside. 9. On either side of the screen is a screen latch mechanism (shown below). Lift out the one on right side and set it aside in a safe place. You can leave the one on the left side in place.
10. Also on the right side, near the top, is a connector that connects the power supply to the screen. Unplug it as shown below. nnector 11. Carefully lift up the power supply and set it next to the screen as shown below. It is connected by cables so you cannot remove it completely.
12. Grasp the tan-colored tab from which you unplugged the connector and carefully pull it out of the screen. This removes the electroluminescent element, as shown below. The element is flexible, so it is all right if you bend it slightly as you pull it out.
16. Replace the latch mechanism you removed in step 9. Be careful to seat it properly, as shown below. Also be sure the one on the left side is properly aligned. 17. When all the components are seated inside the screen, replace the front cover you removed in step 8.
Turning Off the Hard Disk To avoid drive access problems, it is best to leave the hard disk switch on at all times. However, if you are using the computer without the AC adapter, you may want to turn the hard disk off when you are not using it to conserve the charge of the computer’s battery.
When you load MS-DOS f rom the hard disk, the operating system is copied to the computer’s memory; however, all the MS-DOS programs remain only on drive C and are not copied to memory. When you turn off the hard disk, the computer no longer has a drive C.
4. After you log on to drive A, you can turn off the hard disk. 5. Continue using the application program, working on drive A. 6. When you want to save your text on the hard disk, turn it on. Enter the command for saving the text on drive C. The hard disk may take up to 10 seconds to perform the operation because it needs to reinitialize itself.
Appendix B Troubleshooting You should not encounter any serious difficulties as you set up and use your Equity LT. But if anything out of the ordinary happens, read this appendix. Usually, such a situation requires nothing more than adjusting a cable connection, repeating a software procedure, or resetting the computer.
2. If the power light still does not come on, turn off the power switch. Check to see that the AC adapter is securely connected to both the computer and an electrical outlet. Then turn the power back on. 3. If the computer still does not start up, check the electrical outlet.
3. Remove any diskettes, then turn off the power switches on the monitor and the main unit. Check that the monitor’s power cable is securely connected to the monitor and to an electrical outlet, and that the monitor cable is properly connected to both the monitor and the main unit.
1. Turn off the computer. 2. Connect the AC adapter to the computer and to an electrical outlet and let the battery charge for at least 12 hours. 3. Disconnect the AC adapter. 4. Turn on the computer, but do not insert a diskette and do not use the computer.
to see what files the diskette contains; it may contain information you do not want to change or lose. (Chapter 4 describes how to display a directory.) Although you should normally write-protect all program diskettes, some application programs store temporary files on the diskette.
To operate properly, some programs require the computer to run at 4.77 MHz. Try changing the CPU speed with the switch above the keyboard. See “Selecting Execution Speed” in Chapter 3. Printer Problems Your printer manual describes methods to solve most printer problems.
Appendix C Power-on Diagnostics The built-in memory (ROM) of your computer contains a series of diagnostics programs. These programs are run automatically by the system every time you turn on the power. The diagnostics programs check the internal devices such as ROM, RAM, keyboard controller, timer, video controller, and floppy disk driver.
If an I/O or checksum error occurs, you see this message: xxxx0 ROM error where xxxx is the number of the segment of the bad I/O ROM on an option card. Clock and CMOS RAM Check When the system device check is completed successfully, the computer checks the timer and CMOS RAM.
If there are faulty RAM chips in your system, you see this message: xxxx0 201 -Memory error Keyboard Controller and Keyboard Check The computer checks the keyboard controller and keyboard for problems such as failure of one of the keys to release.
Hard Disk Controller and Hard Disk Check The computer next checks the hard disk controller and drive unit. If a malfunction is found in the hard disk con- troller, you see one of these error messages:.
Appendix D Performing System Diagnostics This appendix describes how to check the operation of the main unit and peripheral devices of your Equity LT. You check these devices using the diagnostics program on your reference diskette. Run diagnostics if you are unsure whether a device is performing correctly.
After these items are checked, you see a list of the devices available for testing: DEVICE LIST 1 - System board 2 - Memory 3 - Keyboard 5 - Video adapter and display 6 - Floppy disk drives and contro.
To perform the test multiple times, press 2 and Enter. You see this prompt: Terminate checking if an error detected (Y/N)? Press Y and Enter to terminate checking if the device produces an error, or press N and Enter to repeat the tests regardless of an error.
The program continues after an error in one of the following ways: l It returns to the DEVICE LIST, or l If you are running multiple tests and are not terminating on an error, the program repeats the test that caused the error.
Note This option does not check expanded memory above the 640KB memory limit imposed by MS-DOS. For this check, the program writes specific data into memory and then reads it back. The data is written and read in blocks of 64KB. A parity check is also made on each block.
Type the number of your keyboard layout and press Enter. You can exit the keyboard test by pressing 0 and Enter. After you select a keyboard layout, the program displays the layout on the screen. Press each key on the keyboard to be sure the corresponding character is displayed on the screen.
You can select the individual checks from this menu: VIDEO ADAPTER AND DISPLAY CHECK MENU 1 - Video adapter check 2 - Attribute check 3 - Character set check 4 - 40-column character set check 5 - 320X.
Attribute check To check the display attributes of the video adapter, press 2 and Enter. Several messages are displayed showing examples of all the possible display attributes and colors.
If the characters displayed match the illustration, press Y and then Enter. If you find a problem with the characters on the screen, press N and Enter to display the error message. 40-column character set check To check your 40-column character set, press 4 and then Enter.
The same pattern is displayed again; this time the squares are cyan, white, and magenta, and the background is red. These colors are called Color Set 1.
Screen paging check To check the screen paging of your monitor, press 7 and Enter. The video RAM on the video adapter is divided into eight independent display pages. This test checks the eight pages by first filling all eight with a number corresponding to the page, and then displaying each page in turn.
Color video check Option 8, Color video check, displays 16 different screens, each a different color, and a message indicating the color. The screens show the following colors in the order specified b.
Floppy Disk Drives and Controller Check Use this option to test the performance of the floppy disk (diskette) drives inside or connected to your computer. This test includes several checks that allow you to identify particular problems related to your diskette drives.
When the format is complete, you see these messages (for a 720KB diskette): Format complete 730112 bytes total disk space 730112 bytes available on disk Format another (Y/N)? You can format another diskette or return to the OPERATION MENU. Then press 3 and Enter to select System diagnostics.
When you finish running the floppy disk drive check, press 0 and Enter to return to the OPERATION MENU. Sequential seek check This test checks the ability of the read/write heads to locate any part of the diskette. This action by a read/write head is called a seek.
Use only a formatted blank diskette for this test. Any data present may be erased. If using drive A, remove your Reference Disk. Enter Y to start this check. Enter N to return to the menu. If you are using drive A, remove the reference diskette and insert the blank diskette you prepared in the drive; then press Y and Enter.
Run all above checks To run all the tests on the menu in sequence, press 5 and Enter. When you choose this option, all checks for the diskette drive(s) and controller are performed automatically in sequential order. Although you do not start each test, you must still supply the appropriate responses to progress from one test to the next.
insert a special loop-back connector into the RS-232C port so that the computer can check individual pins of the port. Contact your dealer if you need a loop-back connector.
Once again, if any data received does nor march the data a verify error occurs, and the computer reports the transmitted and received data at the rime of the error. Alternate Serial Port Check If you have turned on DIP switch 4 on the back panel, select option 12 to test the serial communications (RS-232C) port.
The pattern looks like this: The text data includes all the characters commonly used by programs that require foreign languages or graphic characters. If your printer prints different characters than you see in the illustration, you may need to take care with certain software.
If you specified to run the hard disk drive check multiple times, this menu does not display and only the first three tests are performed. Seek check This test checks the ability of the read/write heads to locate any part of the hard disk. This action by a read/write head is called a seek.
You do not see a cylinder count during the test. If no errors occur, the program returns to the menu. If an error is reported, consult your dealer. Error detection and correction check This test checks the ability of the hard disk drive to detect a read/write error and to correct the data accordingly.
The cylinder number counts down to 0. At the end of the test, you see a table of the results of the test. For example, for a 20MB hard disk with three bad tracks, you see the following: BAD TRACKS . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Error Codes and Messages Table D-1 lists all the error codes and messages that may appear during diagnostic checks. Table D-1. Error codes and messages Error code Message System board 101 V30 CPU ERRO.
Error code Message Alternate serial port 1201 ERROR DTR DSR, DSR ALWAYS HIGH/LOW 1201 ERROR RTS CTS, CTS ALWAYS HIGH/LOW 1202 TIME OUT ERROR 1203 VERIFY ERROR Dot-matrix printer 1401 status: error-typ.
Appendix E Equity LT Specifications CPU and Memory 16-bit CPU Main memory ROM pPD70116 V30 microprocessor; 4.77 or 10 MHz clockrate, switch-selectable 20-bit address and 16-bit data bus 640KB RAM (wit.
Clock/calendar/ RAM Real-time clock, calendar, and 50-byte CMOS RAM for configuration; battery backup Power Supply Internal, rechargeable NiCad battery pack; 5 to 7 hours usage AC adapter; 15 volts Ma.
Physical Characteristics Depth Width Height Weight 12.2” (310 mm) 13.6” (345 mm) 3.2” (79 mm) Dual diskette drive system: 12.6 lb (5.72 kg) with standard LCD 13.1 lb (5.94 kg) with backlit LCD Hard disk drive system: 13.7 lb (6.22 kg) with standard LCD 14.
Appendix F Glossary Application program A software program designed to perform a specific task, such as a word processing or spreadsheet program. ASCII American Standard Code for Information Interchange. A standardized coding system for representing characters, such as numbers, letters, and graphic symbols.
Byte A sequence or group of eight bits that represents one character. Character Anything that can print in a single space on the page or the screen. Includes numbers, letters, punctuation marks, and graphic symbols. CMOS Complementary Metal-Oxide Semiconductor.
Data Information stored or processed by a computer. Data diskette A formatted diskette used to store files. Data length The number of bits per character in serial communications. Default Values or settings that take effect when the computer is turned on or reset.
Disk drive The physical device that allows the computer to read from and write to a disk. A diskette drive has a disk slot into which you insert a diskette. A hard disk is permanently fixed inside the main unit. Diskette A flat piece of flexible plastic coated with magnetic material and used to store data permanently.
GW-BASIC Microsoft’s extended version of the Beginner’s All-purpose Symbolic Instruction Code. A programming language designed to be easy to use and understand. Hard disk The enclosed unit used to store data permanently. Unlike a diskette, it is fixed in place.
Megabyte (MB) A unit used to measure storage space (in a computer’s memory or on a disk). One megabyte equals 1,048,576 bytes. Memory The area where your computer stores data. Memory contents can be permanent and inalterable (ROM) or temporary (RAM).
Parity Data signals sent during communications to detect errors in transmitting or receiving data. Partition To divide a hard disk drive into separate sections for use by different operating systems. Peripheral A device (such as a printer or a modem) connected to a computer that depends on the computer for its operation.
Reset To reload a computer’s operating system so you can retry a task or begin using a different operating system. Resetting clears RAM. ROM Read Only Memory. A portion of memory that can only be read and cannot be used for temporary storage. ROM retains its contents even when you turn off the power.
Subdirectory A directory or group of files that branches down from another subdirectory or from the root directory. Switch An option added to an MS-DOS command that redirects the way the command works. Switches must be preceded by a / (forward slash).
Index A AC adapter, connecting, 1-5-6, 3-2 power cord, 1-2, 1-5 using, 1, 3-1 -2, 3-12 AC power indicator, 1-6 Alternate serial port check, D-19 Application program, 1-14, 3-6, 4-18 ASCII codes, 3-9 Asynchronous, E-1 Attribute check, D-8 Auto-boot, MS-DOS, 2-5-6 AUTOEXEC.
Copying, disks, 1-19-22, 3-10, 3-13, 4-8-12 reference files, 2-5 system files, 2-4 Country code, 2-4 CPU, E-l CPU chip, D-4 CPU speed, selecting, 3-5 CPU SPEED switch, 3-5, B-6 Creating MS-DOS partiti.
Extended character set, 3-9 Extension, file, 4-4 External diskette drive, 1, 1-8, 1-10, 1-14, 2-5 F FDISK program, 2-1-2 File extension, 4-4 Filename, 4-4 Floppy disk drive and controller check, D-13 .
Low battery, 3-2, B-3 -4 LOW BAT indicator, 3-2-3, B-4 M Magnetic surface, disks, 3-9 Main memory, 1, 1-21, E-1 Mass storage, 3-3, E-2 Mass storage LED, 3-3 Memory, 1, 1-21, E-1 See also RAM Memory ch.
R RAM (random access memory), 1, 1-17, C-1, E-1 RAM checks, C-2 Random seek check, D-15 Read-only memory (ROM), C-l, E-l Read, verify, D-22 Read/write heads, 3-10 Real-time clock, 1-22 -24 Recharging .
U Unpacking, 1-1 -2 Using AC adapter, 3-1 -2, 3-12 Using battery, 3-1 -2 Using Equity LT, 3-1 Using handle, 1-1 -2 V Video adapter, display check, adapter check, D-7 attribute check, D-8 character set.
10 Steps to Setting Up the Equity LT 1 Unpacking 7 Connecting the Screen 4 Charging the Battery 5 Connecting a Printer 6 Setting the DIP Switches 7 Turning On 8 Loading MS-DOS the Computer 9 Copying System 10 Running Setup Diskettes Exit Real-time clock DISKCOPY A: B: Backlight period Primary serial port Secondary serial port 06-4.
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