Epson I+ Jumper J2, Parity RAM

Jumper J2, Parity RAM

Parity RAM enables the computer to make sure that the data stored in its memory is valid. The Equity I+ can support parity RAM to give you added protection against loss of data. Installation of parity RAM is a simple process, but you should ask your dealer to do it for you, as well as test the RAM carefully. If you decide to install the parity RAM yourself, follow the instructions below carefully.

You need to install four RAM chips. After you remove the cover of the computer (see “Removing the Cover” in Chapter 3) locate sockets 6M, 6N, 7M, and 7N. See Figure A-2. Sockets 6M and 7M require 50256 or 51256 type (256KBitxl) chips; sockets 6N and 7N require 4164 (64KBitxl) chips.

When you insert the chips you must be absolutely certain that each one is installed correctly, with the notch toward the back of the computer.

Once the chips are installed, locate jumper J2, as shown in Figure A-2.

To reach jumper J2 you need to remove the shielding over the power supply by removing the two screws shown in the diagram below. Replace the shielding after you move the jumper.

The factory setting for this jumper is position A. To enable the newly installed parity RAM, J2 must be moved to position B.

If a fault occurs in the parity RAM, the computer displays a message during the power-on diagnostics tests. You can continue work by adjusting Jumper J2 to disable the parity RAM, but other errors may also occur, and you should report the problem to your Epson dealer as soon as possible.

A-3

Contents

Page Page IMPORTANT NOTICE DISCLAIMER OF WARRANTY COPYRIGHT NOTICE TRADEMARKS Epson is a registered trademark of Seiko Epson Corporation Note: WARNING Contents Appendixes Tables Introduction How to Use This Manual Setting Up Your System 1 Unpacking Removing the disk drive protector sheet 2 Choosing a Location 3 Arranging the Components The Figure 1-2.Rear panel The front panel Figure 1-3.Front panel 4 Connecting the Power Cord Figure 1-4.herring the power cord 5 Connecting the Video Monitor 6 Connecting the Keyboard Figure the unit 7 Connecting the Printer Parallel interface PARALLEL Serial interface The Equity I+ character set 8 Setting the DIP Switches DIP switch set 1 (internal operations) Enhanced Page DIP switch set 2 (parallel and serial port operations) Page 9Turning On the Computer Safety rules Initial setup procedure Initial screen display Page Using Your Equity I+ Special Keys Selecting Execution Speed Resetting the Computer Turning Off the Computer Using Disks and Disk Drives How disks work Choosing diskettes for the Equity I+ Caring for your disks and disk drives Page Inserting and removing diskettes blank Write-protectingdiskettes Making backup copies Using a single floppy disk drive Using a hard disk drive Page Installing Option Cards Removing the Cover Page Figure 3-3.Removing cover Inserting the Option Card Inserting Removing an access slot cover Replacing the Cover Post-installationSetup Removing Option Cards Troubleshooting The Computer Fails to Start Up The Video Display Does Not Appear The Computer Locks Up or Freezes Floppy Disk Problems Hard Disk Problems Software Problems Printer Problems Option Card Problems Changing Jumper Settings Figure A-1.Jumper positions Jumper J1, Floppy Disk Controller Figure A-2.Jumper locutions Jumper J2, Parity RAM Specifications Main Unit Keyboard Mass Storage Power Supply Environmental Requirements Physical Characteristics (CPU Only) Video and Display Options Glossary Command Configuration Control code Cursor Data Disk drive Diskette Double-density File Floppy disk H a r d w a r e Input/output port Interface Jumper Kilobyte (KB) Monochrome monitor MS-DOS Operating system Option card Parallel Read Read/write head Reset RGB ROM Tracks Write To store data on a disk Write-protect C-7 Index Index-2 Page Index-4 Page Page IMPORTANT NOTICE Contents Moving the Hard Disk System-dependentUtilities Appendixes Tables Introduction Page Running the Diagnostics Starting the Diagnostics The Power-onSelf Test The OPERATION MENU Exiting Diagnostics Diagnostics and MS-DOSCommands Page Setting Up the System Using the Setup Program ESC ** SAVE SETTINGS Change settings Exit without saving ** EXIT AND SAVE Setting the Real-timeClock block Real-time Changing Serial Port (RS-232C)Settings Baud Stop 300bps Data length Formatting a Hard Disk Formatting and Checking Options Enter drive letter (C/D) Conditional Format (Normal) Scanning Format cancelled Press ENTER to return to the menu Now formatting Format finished Flagging bad tracks Unconditional Format Destructive Surface Analysis Page Non-destructiveSurface Analysis Formatting a Diskette Insert new diskette for drive A: and strike ENTER when ready Performing System Diagnostics Using the System Diagnostics Program 2 - Memory 3 - Keyboard 11- Serial port (RS-232Cport) 14- Dot-matrixprinter by Enter. You see a Modify DEVICE LIST l - Add devices 2 - Delete devices 0 and Enter and Page System Board Check Memory Check Keyboard Check Monochrome Display Adapter and CRT Check Attribute Character Video check Is the display correct (Y/N) Character set check by Enter Color Graphics Adapter and CRT Check 1 and Page Y and Enter Enter to 640x200 graphics mode check To check your 640x200 graphics mode, press 6 and Enter 640X200 GRAPHICS MODE CHECK MODE Is the display correct (Y/N) 8 and Enter. To Floppy Disk Drives and Controller Check Sequential seek check Current track is Random seek check Write, read check If using drive A, remove your Diagnostics Disk Math Coprocessor Check (8087) Parallel Port (Printer Interface) Check Enter Y to start this check when connector is Parallel Port (on Video Adapter) Check Serial Port (RS-232C)Check Alternate Serial Port Check Dot-matrixPrinter Check Hard Disk Drives and Controller Check When you select option 17 from the DEVICE LIST, you see this menu: HARD DISK DRIVE(S) AND CONTROLLER CHECK MENU l- Seek check 2- Write, read check 3- Error detection. and correction check 4- Read, verify check 5- Run all above checks Page READ TRACKS Moving the Hard Disk System-dependentUtilities The HELP Utility When the menu is displayed, you see this prompt at the bottom of the screen: Select command name, Enter to display command, Esc to Exit Page Up Pg Up) Esc HELP Caution The ROMBIOS Utility The SYSTAT Utility Type SYSTAT only and press Enter. You see a screen similar to this: CPU speed Display type Coprocessor Real-timeclock Esc Error Codes and Messages Table A-1. Error codes and messages Table A-1.Error codes and messages (continued) x 200 GRAPHICS MODE 703COPROCESSOR INVALID OPERATION MASK ERROR COPROCESSORSUBTRACTION ERROR Table A-1Error codes and messages (continued) ERROR DTR DSR, DSR ALWAYS HIGH/LOW ERROR RTS CTS, CTS ALWAYS HIGH/LOW status error- t y p e Power-onDiagnostics System Device Check Clock and CMOS RAM Check 161-Systemoptions not set (Run SETUP in DIAGNOSTICS) RAM Check Keyboard Controller and Keyboard Check Floppy Disk Drive Seek Check Index