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

   ULTRA15C

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

   Data bus: 16-bit, PC/AT

   Size: Half-length, full-height card

   Hard drives supported:  Two IDE (AT) Interface drives

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

<gopher://bitreich.org/I/th99/c/U-Z/20210-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 34-pin control cable connector-floppy drive     |    J1    |
   |-------------------------------------------------+----------|
   | 4-pin connector-drive active LED                |    J6    |
   |-------------------------------------------------+----------|
   | 40-pin IDE (AT) Interface control cable         |   JP23   |
   | connector                                       |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             |  Location   |  Setting   |
   |---------------------------------+-------------+------------|
   |   | Supports a third floppy on  | JP11/jumper |   closed   |
   |   | single twisted cable (DS4)  |      1      |            |
   |---+-----------------------------+-------------+------------|
   |   | Supports a third floppy on  | JP11/jumper |    open    |
   |   | double twisted cable (DS2)  |      1      |            |
   |---+-----------------------------+-------------+------------|
   |>> | Hard drive port address is  | JP11/jumper |    open    |
   |   | 1F0-1F7h                    |      2      |            |
   |---+-----------------------------+-------------+------------|
   |   | Hard drive port address is  | JP11/jumper |   closed   |
   |   | 170-177h                    |      2      |            |
   |---+-----------------------------+-------------+------------|
   |>> | Floppy drive enabled        | JP11/jumper |   closed   |
   |   |                             |      3      |            |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive disabled       | JP11/jumper |    open    |
   |   |                             |      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 precomp. is    | JP11/jumper |   closed   |
   |   | 125ns                       |      6      |            |
   |---+-----------------------------+-------------+------------|
   |>> | Chassis ground connection   |    JP16     |    open    |
   |---+-----------------------------+-------------+------------|
   |>> | Hard drive interrupt is     |    JP21     | pins 2 & 3 |
   |   | IRQ14                       |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Hard drive interrupt is     |    JP21     | pins 1 & 2 |
   |   | IRQ15                       |             |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        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    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | Both SIMM's must be of the same size (256K, 1MB, or 4MB)   |
   | and must be rated at 100ns or less. Reserved jumper        |
   | settings are as follows: JP4/jumpers 1-4 are reserved and  |
   | must be left "open". JP24 is reserved and must be left     |
   | "open". JP27 is reserved and must remain as is. JP22 and   |
   | JP26 are factory reserved and the defaults are as follows: |
   |                                                            |
   | JP22/jumpers 1 & 2, 5 & 6, and 10 & 11 should be "open",   |
   | jumpers 3 & 4, 7 & 9 should be "closed." JP26/jumpers 2    |
   | through `6 should be left "open", jumpers 1, 7 through 9   |
   | should be left "closed"                                    |
   +------------------------------------------------------------+