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       # 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                                  
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        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 C8000h |    W8    |  Open   |
          |---+-----------------------------------+----------+---------|
          |   | BIOS controller address is CA000h |    W8    | Closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |        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 R0204E|  640   | 8  | 25 | Open | Open |Closed|Closed|
          |-------------+--------+----+----+------+------+------+------|
          |Seagate ST238|  615   | 4  | 25 | Open | Open | Open | Open |
          |-------------+--------+----+----+------+------+------+------|
          | Syquest SQ  |  615   | 2  | 25 |Closed|Closed| Open | Open |
          |     319     |        |    |    |      |      |      |      |
          |-------------+--------+----+----+------+------+------+------|
          |Tandon TM 502|  306   | 4  | 25 | Open |Closed| Open | Open |
          |-------------+--------+----+----+------+------+------+------|
          |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     |
          +------------------------------------------------------------+