RANCHO TECHNOLOGY, INC.
=======================

   RTSDA-SF, RTSDA-BP

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:     | None                                       |
   |---------------+--------------------------------------------|
   | Size:         | 3.25 in. form factor                       |
   |---------------+--------------------------------------------|
   | Hard drive    | SCSI devices, single-ended to differential |
   | supported:    | converter                                  |
   |---------------+--------------------------------------------|
   | Floppy drives | None                                       |
   | supported:    |                                            |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/P-R/20914-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                   Function                    |  Location  |
   |-----------------------------------------------+------------|
   | 50-pin single-ended SCSI connector - internal |     J1     |
   |-----------------------------------------------+------------|
   | 50-pin differential SCSI connector - internal |     J2     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 TERMINATION POWER SETTINGS                 |
   |------------------------------------------------------------|
   |              |Single-side|Differential-side|               |
   |--------------+-----------+-----------------+---------------|
   | |  Function  |    W1     |       W3        |  W2   |  W4   |
   |-+------------+-----------+-----------------+-------+-------|
   |>>|TERMPWR     |open       |closed           |open   |closed |
   | |supplied to |           |                 |       |       |
   | |converter   |           |                 |       |       |
   | |            |           |                 |       |       |
   | |terminators |           |                 |       |       |
   | |internally  |           |                 |       |       |
   |-+------------+-----------+-----------------+-------+-------|
   | |TERMPWR     |closed     |open             |closed |open   |
   | |supplied to |           |                 |       |       |
   | |converter   |           |                 |       |       |
   | |            |           |                 |       |       |
   | |terminators |           |                 |       |       |
   | |externally  |           |                 |       |       |
   | |            |           |                 |       |       |
   | |(with       |           |                 |       |       |
   | |internal    |           |                 |       |       |
   | |power       |           |                 |       |       |
   | |protection) |           |                 |       |       |
   |-+------------+-----------+-----------------+-------+-------|
   | |TERMPWR     |closed     |closed           |closed |closed |
   | |supplied to |           |                 |       |       |
   | |both        |           |                 |       |       |
   | |converter   |           |                 |       |       |
   | |            |           |                 |       |       |
   | |and remote  |           |                 |       |       |
   | |terminators |           |                 |       |       |
   | |internally  |           |                 |       |       |
   | |            |           |                 |       |       |
   | |and         |           |                 |       |       |
   | |externally  |           |                 |       |       |
   |------------------------------------------------------------|
   |Note: When W1 is closed, TERMPWR is supplied to a remote    |
   |terminator on the single-ended side.                        |
   |                                                            |
   |When W2 is closed, TERMPWR is supplied to a remote          |
   |terminator on the differential side.                        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    MISCELLANEOUS NOTES                     |
   |------------------------------------------------------------|
   |   The difference between the two models is that RTSDA-BP   |
   |              comes with its own power supply.              |
   +------------------------------------------------------------+