SCIENTIFIC MICRO SYSTEMS

OMTI 5520B

  Data bus:                  8-bit ISA

  Size:                      Half-length, full-height card

  Hard drive supported:      Two MFM ST-506/412 drives

  Floppy drives supported:   None

[Image]

                            CONNECTIONS

                   Function                          Location

  34-pin control cable connector - hard drive           J1

  20-pin data cable connector - drive 1                 J2

  20-pin data cable connector - drive 2                 J3

                        USER CONFIGURABLE SETTINGS

              Function                    Location           Setting

  »   BIOS controller enabled                W7                open

      BIOS controller disabled               W7               closed

  »   BIOS controller address is             W8                open
      C8000h

      BIOS controller address is             W8               closed
      CA000h

                 HARD DISK TYPE SELECTION FOR DRIVES 0 AND 1

     Model       Cylinder   Head    WPC      W1       W2      W3       W4
                  Nbr.     Nbr.    cyl.

  CDC 9415-36      697       5      256     open     open    closed   closed

  Cynthia 570      987       7      N/A    closed    open    closed   closed

   DMA/Ricoh       612       2      400    closed    open    closed   open

     (10MB
  removeable)

  Lapine 3522      306       4      128     open     open    open     open

     Maxtor        918      15      N/A    closed   closed   closed   closed
    XT1140

   Miniscribe      612       2      128     open     open    closed   open
   3012/3212

   Miniscribe      612       4      128     open    closed   closed   closed
     3425

  Microscience     306       4      N/A    closed   closed   open     closed
     HH312

  Quantum Q540     512       8      256     open    closed   closed   open

  Rodime 352       306       4      N/A    closed   closed   open     closed

    Seagate        306       4      128     open     open    open     open
   ST212/412

    Seagate        612       2      256    closed    open    open     open
     ST213

    Seagate        615       4      256     open    closed   open     open
     ST225

    Seagate        615       4      300    closed   closed   open     open
    ST4026

    Seagate        733       5      300    closed    open    open     closed
    ST4038

    Seagate        977       5      300     open    closed   open     closed
    ST4051

  Vertex V170      987       7      N/A    closed    open    closed   closed

  Note: Install jumpers W1 through W4 in a two-drive system, only when both
  drives are the same model

  and that model is listed above. If drive model is not listed above, do not
  install jumpers W1

  through W4.

  WPC is Write Precompensation.

                      HARD DISK I/O ADDRESS SELECTION

             Address                       W5                  W6

  »              320h                     open                open

                 324h                    closed               open

                 328h                     open               closed

                 32Ch                    closed              closed