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

   ULTRA12C

   +------------------------------------------------------------+
   +------------------------------------------------------------+

   Data bus: 16-bit, PC/AT

   Size: Full-length, full-height card

   Hard drives supported:  Two ESDI drives

   Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB

   Maximum heads/cyl.: 16 heads and 1024 cylinders

<gopher://bitreich.org/I/th99/c/U-Z/20208-1.png>
   

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

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |   Address    | JP10/jumper 1 | JP10/jumper  | JP10/jumper  |
   |              |               |      2       |      3       |
   |--------------+---------------+--------------+--------------|
   |   | Disabled |     open      |     open     |     open     |
   |---+----------+---------------+--------------+--------------|
   |>> |  C800h   |     open      |     open     |    closed    |
   |---+----------+---------------+--------------+--------------|
   |   |  CC00h   |     open      |    closed    |     open     |
   |---+----------+---------------+--------------+--------------|
   |   |  D000h   |     open      |    closed    |    closed    |
   |---+----------+---------------+--------------+--------------|
   |   |  D400h   |    closed     |     open     |     open     |
   |---+----------+---------------+--------------+--------------|
   |   |  D800h   |    closed     |     open     |    closed    |
   |---+----------+---------------+--------------+--------------|
   |   |  DC00h   |    closed     |    closed    |     open     |
   |---+----------+---------------+--------------+--------------|
   |   | Disabled |    closed     |    closed    |    closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            |   Location   |  Setting   |
   |--------------------------------+--------------+------------|
   |>> | Factory configured - do    |     JP2      |    open    |
   |   | not alter                  |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Factory configured - do    |     JP3      |   closed   |
   |   | not alter                  |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Factory configured - do    |     JP4      |    open    |
   |   | not alter                  |              |            |
   |---+----------------------------+--------------+------------|
   |   | Battery back-up            | JP5 and JP6  |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | Supports a third floppy on | JP11/jumper  |    open    |
   |   | DS2 with a twisted cable   |      1       |            |
   |---+----------------------------+--------------+------------|
   |   | Supports a third floppy on | JP11/jumper  |   closed   |
   |   | DS4 with a straight cable  |      1       |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive 1 is an AT    | JP11/jumper  |    open    |
   |   | type drive (5.25" or 3.5") |      2       |            |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive 1 is a 3.5"   | JP11/jumper  |   closed   |
   |   | PS/2 type drive            |      2       |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive 0 is an AT    | JP11/jumper  |    open    |
   |   | type drive (5.25" or 3.5") |      3       |            |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive 0 is a 3.5"   | JP11/jumper  |   closed   |
   |   | PS/2 type drive            |      3       |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive port address  | JP11/jumper  |    open    |
   |   | is 3F0-3F7h                |      4       |            |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive port address  | JP11/jumper  |   closed   |
   |   | is 370-377h                |      4       |            |
   |---+----------------------------+--------------+------------|
   |>> | Single speed floppy drive  | JP11/jumper  |    open    |
   |   | supported                  |      5       |            |
   |---+----------------------------+--------------+------------|
   |   | Dual speed floppy drive    | JP11/jumper  |   closed   |
   |   | supported                  |      5       |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive Precomp is    | JP11/jumper  |    open    |
   |   | scaled by data rate:       |      6       |            |
   |   |                            |              |            |
   |   | 500KHz=125ns;              |              |            |
   |   | 300KHz=208ns; 250KHz=250ns |              |            |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive               | JP11/jumper  |   closed   |
   |   | precompensation is 125ns.  |      6       |            |
   |---+----------------------------+--------------+------------|
   |>> | Hard drive port address is |     JP12     |    open    |
   |   | 1F0-1F7h                   |              |            |
   |---+----------------------------+--------------+------------|
   |   | Hard drive port address is |     JP12     |   closed   |
   |   | 170-177h                   |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Chassis ground not         |     JP16     |    open    |
   |   | connected to logic ground  |              |            |
   |---+----------------------------+--------------+------------|
   |   | Chassis ground is          |     JP16     |   closed   |
   |   | connected to logic ground  |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Floppy drive enabled       |     JP17     |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Floppy drive disabled      |     JP17     |    open    |
   |---+----------------------------+--------------+------------|
   |>> | Factory configured - do    | JP20/jumpers |    open    |
   |   | not alter                  |     2-5      |            |
   |---+----------------------------+--------------+------------|
   |>> | Hard Drive Interrupt is    |     JP21     | pins 2 & 3 |
   |   | IRQ14                      |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Hard Drive Interrupt is    |     JP21     | pins 1 & 2 |
   |   | IRQ15                      |              |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    SIMM Size     |    Jumper JP22     |    Jumper JP22A    |
   |------------------+--------------------+--------------------|
   |      256KB       |       closed       |       closed       |
   |------------------+--------------------+--------------------|
   |       1MB        |        open        |       closed       |
   |------------------+--------------------+--------------------|
   |       4MB        |       closed       |        open        |
   +------------------------------------------------------------+