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

   OMTI 510, OMTI 510-HA-3, OMTI 510-HA-7

   OMTI 512, OMTI 512-HA-3, OMTI 512-HA-7

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:                | 8-bit, ISA                      |
   |--------------------------+---------------------------------|
   | Size:                    | Half-length, half-height card   |
   |--------------------------+---------------------------------|
   | Hard drive supported:    | Up to seven SCSI devices        |
   |--------------------------+---------------------------------|
   | Floppy drives supported: | None                            |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/S-T/20447-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 50-pin SCSI connector - internal                |    J1    |
   |-------------------------------------------------+----------|
   | 37-pin SCSI connector - external (OMTI512 only) |    J2    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function             | Location |   Setting    |
   |----------------------------------+----------+--------------|
   |>> | SCSI Busy signal enabled     |    W1    |  pins 2 & 3  |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |   | SCSI Busy signal disabled    |    W1    |  pins 1 & 2  |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |>> | SCSI Message signal enabled  |    W2    |  pins 2 & 3  |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |   | SCSI Message signal disabled |    W2    |  pins 1 & 2  |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |>> | SCSI parity check enabled    |    W4    |  pins 2 & 3  |
   |   |                              |          |    closed    |
   |---+------------------------------+----------+--------------|
   |   | SCSI parity check disabled   |    W4    |  pins 1 & 2  |
   |   |                              |          |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            |   Location   |   Setting   |
   |-------------------------------+--------------+-------------|
   |>>  | BIOS enabled             |      W7      |    open     |
   |----+--------------------------+--------------+-------------|
   |    | BIOS disabled            |      W7      |   closed    |
   |----+--------------------------+--------------+-------------|
   |>>  | BIOS address is C800h    |      W8      |    open     |
   |----+--------------------------+--------------+-------------|
   |    | BIOS address is CA00h    |      W8      |   closed    |
   |----+--------------------------+--------------+-------------|
   |>>  | 28-pin EPROM type        |  W9 and W10  | pins 1 & 2  |
   |    | enabled                  |              |   closed    |
   |----+--------------------------+--------------+-------------|
   |    | 24-pin EPROM type        |  W9 and W10  | pins 2 & 3  |
   |    | enabled                  |              |   closed*   |
   |----+--------------------------+--------------+-------------|
   |>>  | SCSI Receive parity      |     W11      | pins 1 & 2  |
   |    | disabled                 |              |   closed    |
   |----+--------------------------+--------------+-------------|
   |    | SCSI Receive parity      |     W11      | pins 2 & 3  |
   |    | enabled                  |              |   closed    |
   |------------------------------------------------------------|
   | Note: Cut the foil trace between pins 1 & 2 on Jumpers W9  |
   | and W10 if closing pins 2 & 3                              |
   +------------------------------------------------------------+

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

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | Jumper W3 is not used and should remain factory configured |
   |          with pins 1 & 2 in the closed position.           |
   |                                                            |
   |  Do not disable SCSI Busy and Message signals (Jumpers W1  |
   |                          and W2)                           |
   +------------------------------------------------------------+