SCIENTIFIC MICRO SYSTEMS
========================

   OMTI 5526, OMTI 5529

   Data bus: 8-bit, ISA

   Size: Half-length, full-height card

   Hard drives supported:  OMTI 5526:Two MFM ST506/ST412 drives

   OMTI 5529:Two RLL ST506/ST412 drives

   Floppy drives supported: None

   Maximum heads/cyl.: 16 heads and 2048 cylinders

<gopher://bitreich.org/I/th99/c/S-T/20183-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                  |    Location    |
   |-------------------------------------------+----------------|
   | 34-pin control cable connector-hard drive |       J1       |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 0       |       J2       |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 1       |       J3       |
   |-------------------------------------------+----------------|
   | 4-pin drive power connector               |       J4       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function               | Location  | Setting |
   |--------------------------------------+-----------+---------|
   |>> | Factory configured - do not      |    W9     |   N/A   |
   |   | alter                            |           |         |
   |---+----------------------------------+-----------+---------|
   |>> | Factory configured - do not      |    W10    |   N/A   |
   |   | alter                            |           |         |
   |---+----------------------------------+-----------+---------|
   |>> | Factory configured - do not      |    W11    |   N/A   |
   |   | alter                            |           |         |
   |---+----------------------------------+-----------+---------|
   |>> | Factory configured - do not      |    W12    |   N/A   |
   |   | alter                            |           |         |
   |---+----------------------------------+-----------+---------|
   |>> | Not documented                   | W17-19 &  |   N/A   |
   |   |                                  |  W26-30   |         |
   |---+----------------------------------+-----------+---------|
   |>> | BIOS enabled                     |    W7     |  open   |
   |---+----------------------------------+-----------+---------|
   |   | BIOS disabled                    |    W7     | closed  |
   |---+----------------------------------+-----------+---------|
   |>> | BIOS base address is C800h       |    W8     |  open   |
   |---+----------------------------------+-----------+---------|
   |   | BIOS base address is CA00h       |    W8     | closed  |
   |---+----------------------------------+-----------+---------|
   |>> | Drive 0 soft sectored            |    W11    |  open   |
   |---+----------------------------------+-----------+---------|
   |   | Drive 0 hard sectored            |    W11    | closed  |
   |---+----------------------------------+-----------+---------|
   |>> | Drive 1 soft sectored            |    W14    |  open   |
   |---+----------------------------------+-----------+---------|
   |   | Drive 1 hard sectored            |    W14    | closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      I/O PORT ADDRESS                      |
   |------------------------------------------------------------|
   |      Address      |     Jumper W5      |     Jumper W6     |
   |-------------------+--------------------+-------------------|
   |>> |     320h      |        open        |       open        |
   |---+---------------+--------------------+-------------------|
   |   |     324h      |       closed       |       open        |
   |---+---------------+--------------------+-------------------|
   |   |     328h      |        open        |      closed       |
   |---+---------------+--------------------+-------------------|
   |   |     32Ch      |       closed       |      closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |   W1 through W4 are used to configure the drive type. To   |
   | support most of the drives on the market, there have been  |
   | several different BIOS's offered. The different BIOS drive |
   | type tables are listed with the 5510; The jumper settings  |
   |          are the same for the 5526 and the 5526/9          |
   +------------------------------------------------------------+