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                            |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/S-T/20921-1.png>
   

   +------------------------------------------------------------+
   |                        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         |
   |------------------------------------------------------------|
   |    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 XT1140|  918   | 15 |N/A |closed|closed|closed|closed|
   |-------------+--------+----+----+------+------+------+------|
   | 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 ST213|  612   | 2  |256 |closed| open | open | open |
   |-------------+--------+----+----+------+------+------+------|
   |Seagate ST225|  615   | 4  |256 | open |closed| open | open |
   |-------------+--------+----+----+------+------+------+------|
   |   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     |
   +------------------------------------------------------------+