ULTRASTOR CORPORATION
=====================

   12F/12

   Data Bus             16-bit ISA                                
   Card Size            Three-quarter length, half-height card    
   Hard Drives          Two ESDI drives                           
   supported            
   Floppy drives        Two 360KB, 720KB, 1.2MB, or 1.44MB drives 
   supported            

<gopher://bitreich.org/I/th99/c/U-Z/21210-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Function      | Location |     Function     | Location |
   |-------------------+----------+------------------+----------|
   | 34-pin cable      |    J1    | 20-pin cable     |    J4    |
   | connector -       |          | connector -      |          |
   | floppy drive      |          | drive 0          |          |
   |-------------------+----------+------------------+----------|
   | 4-pin connector - |    J2    | 34-pin control   |    J5    |
   | drive active LED  |          | cable connector  |          |
   |                   |          | - hard drive     |          |
   |-------------------+----------+------------------+----------|
   | 20-pin cable      |    J3    |                  |          |
   | connector - drive |          |                  |          |
   | 1                 |          |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                USER CONFIGURABLE SETTINGS                  |
   |------------------------------------------------------------|
   |              Function              | Label  |   Position   |
   |------------------------------------+--------+--------------|
   |>> | Factory configured - do not    |  JP1   | Unidentified |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Factory configured - do not    |  JP3   |    Closed    |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | On-board cache enabled         |  JP4   |     Open     |
   |---+--------------------------------+--------+--------------|
   |   | On-board cache disabled        |  JP4   |  Pins 3 & 4  |
   |   |                                |        |    closed    |
   |---+--------------------------------+--------+--------------|
   |>> | Factory configured - do not    |  JP9   |     Open     |
   |   | alter                          |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Third floppy drive with        | JP11/1 |     Open     |
   |   | twisted cable - jumper drive   |        |              |
   |   | as DS2                         |        |              |
   |---+--------------------------------+--------+--------------|
   |   | Third floppy drive with        | JP11/1 |    Closed    |
   |   | straight cable - jumper drive  |        |              |
   |   | as DS4                         |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Drive 1 AT configured          | JP11/2 |     Open     |
   |---+--------------------------------+--------+--------------|
   |   | Drive 1 3.5 inch PS/2          | JP11/2 |    Closed    |
   |   | configured (different pin 2    |        |              |
   |   | polarity)                      |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Drive 0 AT configured          | JP11/3 |     Open     |
   |---+--------------------------------+--------+--------------|
   |   | Drive 0 3.5 inch PS/2          | JP11/3 |    Closed    |
   |   | configured (different pin 2    |        |              |
   |   | polarity)                      |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Floppy drive primary address   | JP11/4 |     Open     |
   |   | is 3F0h                        |        |              |
   |---+--------------------------------+--------+--------------|
   |   | Floppy drive secondary address | JP11/4 |    Closed    |
   |   | is 370h                        |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Single speed floppy drive      | JP11/5 |     Open     |
   |   | enabled                        |        |              |
   |---+--------------------------------+--------+--------------|
   |   | Dual speed floppy drive        | JP11/5 |    Closed    |
   |   | enabled                        |        |              |
   |---+--------------------------------+--------+--------------|
   |>> | Precomp varies according to    | JP11/6 |     Open     |
   |   | floppy data rate               |        |              |
   |---+--------------------------------+--------+--------------|
   |   | Precomp is 125 ns              | JP11/6 |    Closed    |
   |---+--------------------------------+--------+--------------|
   |>> | Hard drive primary address     |  JP12  |     Open     |
   |   | select (1F0-1F7h)              |        |              |
   |---+--------------------------------+--------+--------------|
   |   | Hard drive secondary address   |  JP12  |    Closed    |
   |   | select (170-177h)              |        |              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          USER CONFIGURABLE SETTINGS (CONTINUED)            |
   |------------------------------------------------------------|
   |                Function                | Label | Position  |
   |----------------------------------------+-------+-----------|
   |>> | Chassis ground not connected to    | JP16  |   Open    |
   |   | logic ground                       |       |           |
   |---+------------------------------------+-------+-----------|
   |   | Chassis ground connected to logic  | JP16  |  Closed   |
   |   | ground                             |       |           |
   |---+------------------------------------+-------+-----------|
   |   | Floppy interface disabled          | JP17  |   Open    |
   |---+------------------------------------+-------+-----------|
   |   | Floppy interface enabled           | JP17  |  Closed   |
   |---+------------------------------------+-------+-----------|
   |>> | IRQ 14 select                      | JP20  | Pins 2 &  |
   |   |                                    |       | 3 closed  |
   |---+------------------------------------+-------+-----------|
   |   | IRQ 15 select                      | JP20  | Pins 1 &  |
   |   |                                    |       | 2 closed  |
   |------------------------------------------------------------|
   | Note: Jumpers JP1 and JP9 are removed on revision B00.     |
   | Location of jumper JP16 is unidentified.                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |   Data buffer    |        JP5         |        JP6         |
   |------------------+--------------------+--------------------|
   |>>   |    8KB     | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   |-----+------------+--------------------+--------------------|
   |     |    32KB    | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  BIOS ADDRESS SELECTION                    |
   |------------------------------------------------------------|
   |   Address    | JP10/pins 1 & 2 | JP10/pins 3 | JP10/pins 5 |
   |              |                 |     & 4     |     & 6     |
   |--------------+-----------------+-------------+-------------|
   |>> |  C8000h  |      Open       |    Open     |   Closed    |
   |---+----------+-----------------+-------------+-------------|
   |   |  CC000h  |      Open       |   Closed    |    Open     |
   |---+----------+-----------------+-------------+-------------|
   |   |  D0000h  |      Open       |   Closed    |   Closed    |
   |---+----------+-----------------+-------------+-------------|
   |   |  D4000h  |     Closed      |    Open     |    Open     |
   |---+----------+-----------------+-------------+-------------|
   |   |  D8000h  |     Closed      |    Open     |   Closed    |
   |---+----------+-----------------+-------------+-------------|
   |   |  DC000h  |     Closed      |   Closed    |    Open     |
   |---+----------+-----------------+-------------+-------------|
   |   | Disabled |      Open       |    Open     |    Open     |
   +------------------------------------------------------------+