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

   OMTI 8247

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:         | 16-bit, ISA                            |
   |-------------------+----------------------------------------|
   | Size:             | Full-length, full-height card          |
   |-------------------+----------------------------------------|
   | Hard drive        | Two ST506/412 (RLL) drives             |
   | supported:        |                                        |
   |-------------------+----------------------------------------|
   | Floppy drives     | Two 360KB, 720KB, 1.2MB, or 1.44MB     |
   | supported:        | drives                                 |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/S-T/20689-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                   Function                    |  Location  |
   |-----------------------------------------------+------------|
   | 34-pin floppy drive connector - internal      |     J1     |
   |-----------------------------------------------+------------|
   | 20-pin data connector - drive 0               |     J3     |
   |-----------------------------------------------+------------|
   | 20-pin data connector - drive 1               |     J4     |
   |-----------------------------------------------+------------|
   | 34-pin drive control connector - floppy drive |     J5     |
   |-----------------------------------------------+------------|
   | 4-pin connector - drive active LED            |     J6     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     HARD DISK ADDRESS                      |
   |------------------------------------------------------------|
   |      Setting       |        W1         |        W2         |
   |--------------------+-------------------+-------------------|
   |  Primary Address   |      closed       |       open        |
   |--------------------+-------------------+-------------------|
   | Secondary Address  |       open        |      closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    READ-RECOVERY SELECT                    |
   |------------------------------------------------------------|
   |                   Setting                    |     W6      |
   |----------------------------------------------+-------------|
   | Micro-stepping read-recovery mode - enabled  |   closed    |
   |----------------------------------------------+-------------|
   | Micro-stepping read-recovery mode - disabeld |    open     |
   +------------------------------------------------------------+