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

   RTSDA-M2/RTSDA-S2/RTSDA-SP

   Data bus:     None                                             
   Size:         3.25 in. form factor (RTSDA-S2)                  
                                                                  

                                                                  
                 10 in. x 10.5 in. x 3.0 in. (RTSDA-SP)           
   Hard drive    Fast SCSI-2 devices, single-ended to             
   supported:    differential converter                           
   Floppy drives None                                             
   supported:    

<gopher://bitreich.org/I/th99/c/P-R/20919-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                  |    Location    |
   |-------------------------------------------+----------------|
   | 50-pin single-ended SCSI connector -      |       J1       |
   | internal                                  |                |
   |-------------------------------------------+----------------|
   | 50-pin differential SCSI connector -      |       J2       |
   | internal                                  |                |
   |-------------------------------------------+----------------|
   | Converter active LED                      |       J3       |
   |-------------------------------------------+----------------|
   | SCSI active LED                           |       J4       |
   |------------------------------------------------------------|
   | Note: On the RTSDA-SP model, the converter LED is located  |
   | on the front panel and the 50-pin connectors are external. |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   TERMINATION SELECTION                    |
   |------------------------------------------------------------|
   |   Function   | Single-End | Differential-End |             |
   |--------------+------------+------------------+-------------|
   |   |          |     W3     |      RN1-4       |    RN5-8    |
   |---+----------+------------+------------------+-------------|
   |>> |  Enable  |   Closed   |    Installed     |  Installed  |
   |---+----------+------------+------------------+-------------|
   |   | Disabled |    Open    |  Not installed   |     Not     |
   |   |          |            |                  |  installed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                TERMINATION POWER SETTINGS                  |
   |------------------------------------------------------------|
   |    Function    |Single-side|Differential-side|             |
   |----------------+-----------+-----------------+-------------|
   | |              |    W1     |       W2        |  W4  |  W5  |
   |-+--------------+-----------+-----------------+------+------|
   |>>|TERMPWR       |   Open    |     Closed      |Closed| Open |
   | |supplied to   |           |                 |      |      |
   | |converter     |           |                 |      |      |
   | |terminators   |           |                 |      |      |
   | |directly      |           |                 |      |      |
   |-+--------------+-----------+-----------------+------+------|
   | |TERMPWR       |   Open    |      Open       | Open | Open |
   | |supplied to   |           |                 |      |      |
   | |converter     |           |                 |      |      |
   | |terminators   |           |                 |      |      |
   | |through diode |           |                 |      |      |
   |-+--------------+-----------+-----------------+------+------|
   | |TERMPWR       |  Closed   |      Open       | Open |Closed|
   | |supplied to   |           |                 |      |      |
   | |both converter|           |                 |      |      |
   | |terminator and|           |                 |      |      |
   | |remote SCSI   |           |                 |      |      |
   | |bus pin 26    |           |                 |      |      |
   | |through diode |           |                 |      |      |
   | |(with backflow|           |                 |      |      |
   | |prevention)   |           |                 |      |      |
   |-+--------------+-----------+-----------------+------+------|
   | |TERMPWR       |  Closed   |     Closed      |Closed|Closed|
   | |supplied to   |           |                 |      |      |
   | |both converter|           |                 |      |      |
   | |terminators   |           |                 |      |      |
   | |and remote    |           |                 |      |      |
   | |SCSI bus pin  |           |                 |      |      |
   | |26 directly   |           |                 |      |      |
   |------------------------------------------------------------|
   |Note: Do not use the last option when other peripherals     |
   |supply terminator power to the SCSI bus.                    |
   +------------------------------------------------------------+