SCIENTIFIC MICRO SYSTEMS

OMTI 5527B

Data bus:                8-bit ISA
Size:                    Half-length, full-height card
Hard drive supported:    Two RLL 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

                              (BIOS 1002312-R7)

     Model       Cylinder   Head    Step     W1       W2      W3       W4
                  Nbr.     Nbr.    Rate

                                    ( m

  Lapine Titan     615       4      25      Open     Open    Open     Open
   (3.5 in.)

     Maxtor       1024       8      10     Closed   Closed   Closed   Open
    XT-1085

     Maxtor        918      15      10     Closed    Open    Closed   Closed
    XT-1140

   Miniscribe      612       4      25     Closed    Open    Closed   Open
     3425

  Microscience     12        4      25      Open     Open    Closed   Open
    HH7156

   NEC D3126       640       8      25      Open     Open    Closed   Closed
   (3.5 in.)

   NEC 5126        612       4      25     Closed    Open    Closed   Open

  Newbury Data     612       8      25      Open    Closed   Open     Closed
     Penny

  Rodime RO352     306       4      25     Closed    Open    Open     Open

     Rodime        640       8      25      Open     Open    Closed   Closed
    R0204E

    Seagate        615       4      25      Open     Open    Open     Open
     ST238

   Syquest SQ      615       2      25     Closed   Closed   Open     Open
      319

   Tandon TM       306       4      25      Open    Closed   Open     Open
      502

  Tandon TM755     980       5      25     Closed   Closed   Open     Closed

    Toshiba        830       7      10     Closed    Open    Open     Closed
    MK54FB

    Toshiba        830      10      10      Open    Closed   Closed   Open
    MK56FB

  Tulin R0202E     640       4      25     Closed   Closed   Closed   Closed

  Vertex/Priam     987       5      10      Open     Open    Open     Closed
     V150

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

  and the model is listed above. If drive model is not listed above, do not
  install W1 through W4.

  The Miniscribe 3425, Tandon TM 502 and Tandon TM755 models listed above
  are characterized

  by Reduce Write Current at cylinder numbers 128, 128, 700 respectively.

                HARD DISK TYPE SELECTION FOR DRIVES 0 AND 1

                            (BIOS 1002571-R10)

     Model        Cylinder    Head      W1       W2        W3       W4
                    Nbr.      Nbr.

   Atasi 3085       1024       8      Closed    Closed   Closed   Closed

  Lapine LT300      616        4       Open     Open     Closed   Closed

  Microscience      612        4       Open     Closed   Closed   Closed
     HH330

  Microscience      612        4       Open     Closed   Closed   Closed
     HH738

   Miniscribe       615        4       Open     Open      Open     Open
      3438

   Miniscribe       612        4       Open     Closed   Closed   Closed
      8438

   Peripheral       615        6      Closed    Open     Closed   Closed
   Tech 357R

   Priam V170       987        7      Closed    Closed    Open    Closed

   Priam V185       1166       7       Open     Closed    Open    Closed

   Priam 514        1224       11     Closed    Open      Open    Closed

   Priam 519        1224       15      Open     Open      Open    Closed

     Seagate        615        4       Open     Open      Open     Open
     ST238R

     Seagate        820        4      Closed    Closed   Closed    Open
     ST251R

     Seagate        820        6       Open     Closed   Closed    Open
     ST277R

     Seagate        1024       5      Closed    Open     Closed    Open
    ST4077R

     Seagate        1024       9      Closed    Open     Closed    Open
    ST4144R

    Tobshiba        830        5      Closed    Closed    Open     Open
     MK53FB

     Toshiba        830        7       Open     Closed    Open     Open
     MK54FB

     Toshiba        830        10     Closed    Open      Open     Open
     MK56FB

  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 W1 through W4.

                      HARD DISK I/O ADDRESS SELECTION

             Address                       W5                  W6

  »              320h                     Open                Open

                 324h                    Closed               Open

                 328h                     Open               Closed

                 32Ch                    Closed              Closed