    EPSON America Inc.


           EPSON SD-800/SD-880 DUAL FLOPPY DISK DRIVE
           INSTALLATION INFORMATION & SPECIFICATIONS

    Thank you for your purchase of the EPSON SD-880 dual floppy disk
    drive. This will guide you through the installation of the floppy
    disk drive (FDD) into your computer. The EPSON SD-880 FDD is
    compatible with all IBM PC compatible computers. This FDD uses the
    industry standard ISA interface which assures you of industry-wide
    compatibility.

    This FDD conveniently combines a 3.5", 1.44 Megabyte floppy disk
    drive with a 5.25", 1.2 Megabyte floppy disk drive in a half-height
    chassis. With a single interface connector this FDD can be
    installed in either the upper slot or lower slot in your PC. With
    one jumper, the 3.5" FDD can be configured for the 'A' or 'B' drive
    or the 5.25" FDD can be configured to be the 'A' or 'B' drive, the
    choice is yours.

    How to install the EPSON SD-880 dual FDD into your computer.

    First turn off the computer and remove the power cable. Dangerous
    AC and DC voltages are used within the computer case when the
    computer is turned on and plugged in.

    Please refer to your computer manual to determine the correct
    method to open your computer case and to gain access to the FDD
    slots in the front of the case.

    Install the EPSON SD-880 FDD in either the upper or lower FDD slot
    in your PC. The FDD is mounted using four screws, two on each side.
    It may be necessary to repeat this procedure until the bezel of the
    FDD mounts flush to the front of the PC.

    The FDD can be configured 4 different ways depending on the FDD
    connector used and the position of the SS1 jumper on the FDD.
    There are 2 jumper blocks accessible from the top side of the
    SD-800/SD-880 dual floppy disk drive. For most applications, no
    changes are required in the jumper blocks. If a change is
    determined necessary, make sure that the computer is off and
    unplugged.  Please refer to the diagram below for more information:

                                              3.5"     5.25"
                      Slot   Connector SS1  (1.44Mb)  (1.2Mb)
    Configuration 1:  Upper   Drive A   A       A        B
    Configuration 2:  Upper   Drive A   B       B        A
    Configuration 3:  Lower   Drive B   A       B        A
    Configuration 4:  Lower   Drive B   H       A        B

    FDD cable (inside PC)   34-pin Drive B     34-pin Drive A

    Attach the 4-pin power cable to the rear of the FDD and attach the
    34-pin edge connector to the rear of the FDD.  When looking at the
    rear of the FDD, pin 1 of the connector is to the left. There is a
    small slot between pins 4 and 6 on the FDD connector, line up the
    cable connector with this slot.






                Jumper Configurations

         A                   1    3    D    L    R
        ---                 -----------------------
         X                   o    o    o    o    o
    SS1  X              SS2  o    o    X    X    o
         o                   o    o    X    X    o
        ---                 -----------------------
         B                   0    2    S    H    D

                Default Jumper Settings


    Jumper Definitions
        Drive Select:
           SS 1        Drive Configuration
             A         Drive Select A = 5.25
                       Drive Select B = 3.5"
             B         Drive Select A = 3.5"
                       Drive Select B = 5.25

    Mode Change (5.25"):

        SS 2      Logic
          L       Low: HIGH mode
                  High: NORM mode

          H       Low: NORM mode
                  High: HIGH mode

    Motor Speed in NORM mode (5.25"):

        SS 2           Speed
          D           300 RPM
          S           360 RPM


    Do not place jumpers on SS2, pins 0, 1, 2, 3, R, or D.

    SS1 Determines the "drive select" for the 3.5" and 5.25" FDD.
        In the default position (A) the *A* drive is the 3.5" FDD
        **if** the dual drive is in the upper slot of the pc and
        uses the FDD connector on the end of the cable (after the
        "twist").

        If the SS1 jumper is changed to the (B) position, the 5.25"
        FDD becomes the *A* drive **if** the dual drive is in the
        upper slot of the PC and uses the FDD Connector on the end
        of the cable (after the "twist").

    SS2 No jumpers are necessary between the 0-1-2-3 jumpers.
        The D-S jumper determines the rotational speed of the
        5.25" FDD. The default position (S) sets the speed to 360RPM.
        The (D) position sets the speed to 300RPM.

        The L-H jumper determines the mode of the 5.25" FDD.
        The default position (H) defines Low as Norm mode and
        High = High mode.






    Note: Most PC's can **only** access two FDDS. The SD-880 takes the
          place of 2 FDDS.

    Replace the cover of the computer and replace the power cable.
    Turn on the computer and verify the CMOS settings on the computer
    by running your SETUP program which came with your computer. Be
    sure to inform the SETUP program of the configuration you have
    selected for the new dual FDD.

    Specifications:

    Size:
        Height    41.5mm
        Width     148mm
        Depth     192mm
        Weight    1100g

    3.5- FDD
     Recording method (MFM)    High Density     Standard Density
     Capacity (Unformatted)        2.0              1.0     MB
     Capacity (Formatted)          1.474            0.737   MB
     Transfer rate                 500              250     KBit/Sec
     Maximum recording density     17,434           8,717   BPI

     Track density                      135 TPI
     Number of tracks (2 sided)         160
     Disk rotation                      300 rpm (typ)
     Seek time (trk to trk)               3 ms
     Settling time                       15 ms
     Average time for seeking            95 ms
     Motor start time                   500 ms
     Average latency                    100 ms

    5.25- FDD
     Recording method (MFM)           High Mode   Standard Mode
     Capacity (Unformatted)            1.667      1.0       MB
     Capacity (Formatted)              1.229      0.737     MB
     Transter rate                     500        300    KBit/sec
     Maximum recording density (tk79)  9,870      5,922     BPI

     Track density                         96 TPI
     Number of tracks (2 sided)           160
     Disk rotation                        360 rpm (Typ)
     Seek time (trk to trk)                 3 ms
     Settling time                         15 ms
     Motor start time                     500 ms
     Average latency                       83 ms

    EPSON is a registered trademark of Seiko Epson Corporation.

