
                           README FILE
                        September 24, 1996
                  Zip Tools Software, Version 5.1
     
     Contents
     
     Section  #     Topic
           1   Using the 100MB Zip "tools" Disk
           2   Using the Guest Program
           3   Software Installation Troubleshooting
           4   Electronic Manuals
           5   Installing Zip Support on DOS-Only Systems
                    Iomega Driver for DOS
                    Zip Tools under DOS
           6   Cautions
                    DOS DISKCOPY
                    FDISK
                    Compression
                    Shifting Drive Letters
           7   Pass-Through on the Parallel Port Zip Drive
                    Printers
                    Other Pass-Through Devices
           8   Optimizing Parallel Port Zip Drive Transfer Speed
                    Under DOS

          
     _________________________________________________________
     Section 1
     Using the 100MB Zip "tools" Disk
     
     The 100MB Zip "tools" disk included with your Zip drive is a
     special dual-format disk which contains Zip Tools software
     for BOTH Windows/DOS and Macintosh systems.  Before you can
     write any files to the disk, the disk format must be set as
     EITHER Windows/DOS (IBM-compatible PC) or Macintosh (which
     allows you to store your files safely but eliminates the
     Tools software files stored under the other format type). 
     Running the software Setup program under either Windows 95
     or Windows 3.1 automatically sets the "tools" disk format to
     Windows/DOS and reclaims the Macintosh portion of the disk
     for use on PC systems.  Similarly, running the Zip Install
     program for Macintosh, sets the "tools" disk format to
     Macintosh and erases the PC portion of the disk.  If you are
     installing Zip software support on a DOS-only system, you
     need to run the Reclaim program as described in your Zip
     Installation Guide to set the disk format and unlock the
     disk.
     
     If you use your Zip drive on both PC and Macintosh systems
     and want to install Zip Tools on both system types, you need
     to purchase an additional "tools" disk for installing Zip
     Tools on your second system.  (See your Zip Accessory Guide
     for ordering information.)
     
     NOTE:  The Zip "tools" disk can be used to reinstall Zip
     Tools software on the SAME system type (PC or Macintosh) as
     the initial installation. It is important to keep the
     installation files on the "tools" disk in case you ever need
     to reinstall your Zip Tools software.  (For a PC system, the
     installation files are located under W95Stuff, W31Stuff,
     WNTStuff, and DOSStuff.)

     
     _________________________________________________________
     Section 2
     Using the Guest Program
     
     The Guest program allows you to use a portable Zip drive on
     another computer without having to permanently install
     either an Iomega driver or Zip Tools software.
     
     There are versions of Guest for Windows 95, Windows 3.1/DOS
     and Macintosh systems:  

       *  For Windows 95, run Guest95 from the Windows/DOS
          Install diskette.  If you encounter any problems, see
          "Help for Guest95" on the Install diskette.

       *  For Windows 3.1/DOS systems, run GUEST.EXE from the
          from the Windows/DOS Install diskette.  Refer to the
          GUESTHLP.TXT file on the Install diskette for
          additional information on using GUEST.EXE with IBM-
          compatible PC's.
     
      *   For information on using Guest on Macintosh systems,
          refer to the GUESTHLP.TXT file on the Windows/DOS
          Install diskette.
     
     NOTE:  On Windows 3.1, DOS, or Macintosh systems, running
     the Guest program provides a temporary driver installation
     that is removed when the computer is shut down or restarted. 
     Running Guest95 permanently installs the drivers needed to
     support Iomega hardware under Windows 95.
     
     
     _________________________________________________________
     Section 3
     Software Installation Troubleshooting
     
     Refer to the MANUAL.EXE file on the Windows/DOS Install
     diskette for software troubleshooting information on
     computers running Windows 95, Windows 3.1, and DOS.  Section
     4 in this Readme file contains detailed instructions on
     accessing MANUAL.EXE.

     Note for users of Adaptec EZ-SCSI:
     For information on using Iomega software and Adaptec EZ-SCSI
     on the same system, refer to "Special Information for Users
     of Adaptec EZ-SCSI" in Appendix A of MANUAL.EXE.
     
     
     
     _________________________________________________________
     Section 4
     Electronic Manuals
     
     The Iomega software package for Windows/DOS includes two
     electronic manuals:

      *   The "Iomega Installation Manual" (MANUAL.EXE) which
          contains complete installation and problem-solving
          information for Iomega software under Windows 95,
          Windows 3.1, and DOS.

      *   The "User's Reference Manual" (REFMAN.EXE) which
          contains reference information on Iomega SCSI software,
          including the Iomega Driver, configuration program, and
          Iomega SCSI Utilities.

     To access the Installation Manual, insert the Windows/DOS
     "Install" diskette in a floppy drive (the example below
     assumes drive A:), go to the DOS prompt, and type:
     
               A: <Enter>
               MANUAL <Enter>
     
     You can also run the Installation Manual from the Windows
     File Manager by selecting drive A: and double-clicking on
     MANUAL.EXE.  Under Windows 95, you can access the
     Installation Manual by double-clicking on the floppy drive
     in My Computer and then double-clicking on the "Manual"
     icon.
     

     The User's Reference Manual is located in the DOSSTUFF
     directory on the Zip "tools" disk and installed with the
     Iomega SCSI software package.  Use the following procedure
     if you want to access the reference manual before installing
     your software:

      1.  Insert the "Install" floppy diskette for Windows/DOS
          into the computer's floppy drive and the 100MB "tools"
          disk into the Zip drive.

      2.  Go to the DOS prompt and type:

               a:guest.exe <Enter> (Install floppy in drive A)

                         or
    
               b:guest.exe <Enter> (Install floppy in drive B)

      3.  Note the drive letter Guest assigns to your Zip drive
          and use it in place of "d:" in the following command
          line:

               d:\dosstuff\refman <Enter>


     If you install Iomega SCSI software using the INSTALL
     program, you can access the User's Reference manual from the
     C:\IOMEGA directory after the software installation is
     complete.  Go to the DOS prompt and type:

                    c: <Enter>
                    cd \iomega <Enter>
                    refman <Enter>



     _________________________________________________________
     Section 5
     Installing Zip Support on DOS-Only Systems
     
     Many of the application programs included in the Zip Tools
     software package require Windows 3.1 or Windows 95.  If you
     do not have Windows on your computer, you can still use the
     Zip drive, but you will not be able to use the Zip Tools
     software that requires Windows.  This section describes the
     software support for Zip drives available for DOS systems
     that do not have Windows.
     
     
     ______________________________
     Section 5.1
     Iomega Driver for DOS
     
     Running the INSTALL program from the DOSSTUFF directory on
     the Zip "tools" disk installs Iomega SCSI software to
     support your Zip drive.  The Iomega SCSI Driver installs as
     a device (SCSIDRVR.SYS) in the computer's CONFIG.SYS file, 
     and because of the way DOS handles drive letter assignments,
     this can shift your existing drive letters.
     
     Iomega software for Zip includes a TSR version of the Iomega
     Driver (GUEST.EXE) which will not cause any drive letter
     shifts when it is installed.  If you prefer using the TSR
     version of the Iomega Driver (GUEST.EXE), you can manually
     install it in your AUTOEXEC.BAT file.  Refer to the
     electronic Installation Manual (MANUAL.EXE) for manual
     installation instructions.  MANUAL.EXE also contains
     information on assigning specific drive letters with
     GUEST.EXE.  (See Section 4 in this file for detailed
     instructions on accessing the electronic manuals.)
     
     
     ______________________________
     Section 5.2
     Zip Tools under DOS
     
     Iomega SCSI software includes a set of utilities that run
     under DOS.  You can use these utilities to set software
     protection options on your Zip disks, copy data to or from
     Zip disks, format Zip disks, or lock the Zip drive so that
     you can install software to a Zip disk.
     
     You can run the Utilities in an easy-to-use menu mode or
     from the DOS command line.  To start the utilities in menu
     mode, go to the DOS prompt for drive C: (the drive where
     your Iomega SCSI software is installed) and type:
     
                    cd \IOMEGA <Enter>
                    SCSIUTIL <Enter>
     
     If you need help running the Utilities, press <F1> anywhere
     in the Utilities.  Complete reference information on the
     Iomega SCSI Utilities is contained in the electronic "User's
     Reference Manual" (REFMAN.EXE).  (See Section 4 in this file
     for information on accessing the electronic manuals.)


          
     _________________________________________________________
     Section 6
     Cautions

     Observe the following cautions if you are installing Zip
     software for Windows 3.1 and/or DOS.
     
     
     ______________________________
     Section 6.1
     DOS DISKCOPY
     
     CAUTION! 
     When used with removable disks (for example, Zip disks, Jaz
     disks, Bernoulli disks, etc.), DOS DISKCOPY does not create
     a copy of the source disk on the target disk.  DOS DISKCOPY
     executes as if copying data from the source to the target
     disk; however, after completion, the target disk is
     unreadable and must be reformatted.  Use an Iomega disk
     copying utility to copy disks (either Copy Machine or Iomega
     SCSI Disk Copy).


     ______________________________
     Section 6.2
     FDISK

     CAUTION! 
     Do not use FDISK on any removable disk.  FDISK is designed
     for partitioning fixed disks.  Partitioning any type of
     removable media can lead to unexpected results.
     
     
     ______________________________
     Section 6.3
     Compression
     
     Stacker 4.0 works with removable disks supported by
     GUEST.EXE (for example, Zip disks); however, do not reboot
     when Stacker asks if you want to reboot to remove TSR's. 
     Rebooting removes the Guest driver and eliminates access to
     the Zip drive.

     DoubleSpace and DriveSpace do not work with disks supported
     by GUEST.EXE, but they do work with the Iomega SCSI driver. 
     If you want to use DoubleSpace or DriveSpace to compress
     your Zip disks or other removable disks, install the Iomega
     SCSI driver in your CONFIG.SYS file to support your
     removable drives.  Refer to the electronic "Installation
     Manual" (MANUAL.EXE) for detailed instructions on running
     the INSTALL program from the DOSSTUFF directory on the Zip
     "tools" disk.  If you use Windows, also install your Zip
     Tools software for Windows by running the Zip Tools Setup
     program after installing Iomega SCSI.

     CAUTION! 
     If you are using a compression utility on a removable disk
     (for example, a Zip disk), you should make that disk
     nonremovable (or lock the disk in the drive) whenever the
     compressed volume is mounted.  Removing a disk while the
     compressed volume is mounted could result in lost data.  To
     remove the disk, first unmount the compressed volume, then
     unlock the drive.  Refer to the electronic "User's Reference
     Manual" (REFMAN.EXE) for detailed information on locking and
     unlocking drives.
     
     CAUTION! 
     Do not use any disk compression software to compress
     removable boot disks.


     Iomega SCSI Utilities with Stacker 4.0
     
     When using Stacker 4.0 and Iomega SCSI, mounted, stacked
     drives will not appear on the graphical user interface
     screen for the Iomega SCSI Utilities.  In order to use an
     Iomega SCSI utility on a stacked drive, you must first
     unmount the drive.
     

     ______________________________
     Section 6.4
     Shifting Drive Letters
     
     The following caution applies only if you are installing Zip
     support on a DOS-only system or if you choose to install the
     Iomega Driver, SCSIDRVR.SYS, in your CONFIG.SYS file.
     
     CAUTION! 
     Installing the Iomega SCSI driver may cause your drive
     letters (including network drives) to change.  This could
     affect Windows applications that reference existing drives. 
     Check your Windows groups and "ini" files.  For additional
     information, refer to "Relocating Drive Letters" in the
     electronic "Installation Manual" (MANUAL.EXE).


     
     _________________________________________________________
     Section 7
     Pass-Through on the Parallel Port Zip Drive
     
     This section describes how to handle problems you may
     encounter when connecting printers or other parallel port
     devices to the pass-through connector on the Zip drive.


     ______________________________
     Section 7.1
     Printers
     
     The parallel port Zip drive supports most printers on the
     pass-through connector; however, some printers require
     exclusive use of the parallel port and will not work
     correctly when connected to the Zip pass-through.  Because
     these printers cannot share the parallel port, your system
     may stop responding if you attempt to use the printer and
     your Zip drive at the same time (for example, if you attempt
     to print a file from a Zip disk).

     If you are having problems with your printer when it is
     connected to the Zip pass-through connector, try the
     following:

       *  Try powering on your computer, printer, and Zip drive
          all at the same time by plugging them into the same
          power strip and applying power at the power strip.
     
       *  If you are using Windows 3.1, disable Disk Watch by
          removing it from your Windows Startup folder and then
          restarting Windows.  Disk Watch periodically wakes up
          the Zip drive and checks its status, which temporarily
          disables the Zip pass-through.

       *  Some Print Cache programs may conflict with the
          parallel port Zip drive.  If you have Print Cache on
          your system, disable the audio warning messages for
          both Windows and DOS using the reinstall procedure in
          the Print Cache manual.  (If you encounter problems
          reinstalling, please contact your Print Cache Software
          Technical Support.)

       *  If you have Microsoft Print System installed on your
          computer, try using it to disable bi-directional
          communication to the printer.  (Remove the check mark
          from the box next to "Use bi-directional
          communication.")

       *  Try setting your printer to "Print to File" whenever
          it's not in use.  This will enable you to use your Zip
          drive without problems as long as you are not printing. 
          When you want to print a file from your hard disk (or
          any disk other than a Zip disk), close any files that
          may be open on your Zip disk and return the printer
          setting to normal.  Do not attempt to access your Zip
          drive until the print job is completed and you have
          changed the printer setting back to "Print to File."

     If you are unable to use your printer and the Zip drive at
     the same time, the best solution is to add an additional
     parallel port to your computer, then use the Zip drive on
     one parallel port and your printer on the other.  Most
     computer stores carry simple I/O cards that let you easily
     add a new parallel port.  FarPoint Communications produces
     an I/O card which is fully compatible with the Zip drive and
     will improve your drive's performance.  (Information on this
     card is available from Iomega's Automated FAX Help system at
     (801)778-5763.)  Contact your computer dealer if you wish to
     purchase a card.


     ______________________________
     Section 7.2
     Other parallel port devices

     Parallel port devices other than printers may or may not
     work on the Zip pass-through connector.  This problem exists
     because computer parallel ports were not originally designed
     for devices other than printers.  If you try placing a
     device other than a printer on the Zip pass-through, or
     place the Zip drive on another device's pass-through, there
     are no guarantees that it will work correctly.  

     In the future there will be a standard for daisy-chaining
     devices on the parallel port; when this standard is
     implemented, Iomega will also conform to it.  In the mean
     time, try the suggestions listed under Section 7.1 for
     solving printer problems.  If your parallel port devices
     still do not operate correctly on the Zip pass-through
     connector, or the Zip drive does not operate correctly on
     their pass-through, you may want to think about adding an
     extra parallel port to your computer as described in
     Section 7.1.



     _________________________________________________________
     Section 8
     Optimizing Parallel Port Zip Drive Transfer Speed under DOS

     The parallel port model of the Zip drive supports three
     modes of data transfer which have different transfer speeds. 
     To ensure the broadest base of compatibility for the Zip
     drive, the Iomega installation software for DOS
     automatically uses the most compatible, but slowest,
     transfer mode.  In this mode, the transfer speed for the Zip
     drive is about 2MB to 6MB per minute, depending on the
     computer's processor speed.

     If the computer has a bi-directional parallel port, the Zip
     drive can be set to use a mode which provides data transfer
     speeds of 6MB to 17MB per minute, depending on the
     computer's processor speed.  (If you are not sure whether
     your computer has a bi-directional parallel port, refer to
     the owner's manual that came with your computer.)
     
     The fastest mode supported by the Zip drive requires a
     special "Enhanced Parallel Port" (EPP) chip set to be
     present on the host computer.  In this mode, the data
     transfer speed for the Zip drive is about 17MB to 22MB per
     minute, depending on the computer's processor speed. 
     Because of the variety of EPP chip sets, and because there
     are some chip sets that mimic a true EPP chip but do not
     support EPP transfers, not all systems with "EPP" can
     support this mode for the Zip drive.
     
     Iomega software for Zip includes a parallel port accelerator
     that can automatically set up both your computer and your
     Iomega software to use the fastest transfer mode for the Zip
     drive that is supported by your computer hardware.  Under
     Windows 95, you can run the parallel port accelerator by
     double-clicking on the icon in the Iomega Tools folder on
     your Start Programs menu.  For Windows 3.1, double click on
     the "Parallel Port Accelerator" icon in your Iomega Zip
     Tools Windows group.  

     Under DOS, run the OPTPPM1.EXE utility as follows:
     
     Step 1: If you have not already done so, install your Zip
     software package following the instructions in step 10 of
     the Zip Installation Guide.

     Step 2: Go to the DOS prompt for drive C: and type:

               cd \iomega <Enter>
               optppm1 <Enter>
     
     
     NOTE:  If you wish to restore the default settings on your
     system, run "OPTPPM1.EXE /NIBBLE" from the DOS prompt. 
     (This works under Windows 3.1 as well as DOS.)
