GSI, INC.
=========

   MODEL 2C

   Data Bus                16-bit ISA                             
   Card Size               Half height, half length               
   Hard Drives Supported   Four IDE(AT) devices                   
   Floppy Drives Supported None                                   

<gopher://bitreich.org/I/th99/c/E-H/21347-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Function       | Label |       Function       | Label |
   |---------------------+-------+----------------------+-------|
   | VESA local bus      |  J1   | 40-pin secondary     |  J7   |
   | extension module    |       | IDE(AT) connector    |       |
   |---------------------+-------+----------------------+-------|
   | 4-pin DC power out  |  J5   | 4-pin drive active   |  J8   |
   |                     |       | LED                  |       |
   |---------------------+-------+----------------------+-------|
   | 40-pin primary      |  J6   |                      |       |
   | IDE(AT) connector   |       |                      |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Setting                 | Label | Position  |
   |----------------------------------------+-------+-----------|
   |>> | Factory configured - do not alter  | J4/A  | Pins 2 &  |
   |   |                                    |       |     3     |
   |---+------------------------------------+-------+-----------|
   |>> | GSI BigaByte support for >4095     | J4/G  | Pins 1 &  |
   |   | cylinder drives disabled           |       |     2     |
   |---+------------------------------------+-------+-----------|
   |   | GSI BigaByte support for >4095     | J4/G  | Pins 2 &  |
   |   | cylinder drives enabled            |       |     3     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              IDE(AT) INTERFACE CONFIGURATION               |
   |------------------------------------------------------------|
   | Option |  Primary   | Secondary  |  Primary   | Secondary  |
   |        |   Addr.    |   Addr.    |    IRQ     |    IRQ     |
   |--------+------------+------------+------------+------------|
   |    | 1 |    1F0h    |    170h    |   IRQ14    |   IRQ15    |
   |----+---+------------+------------+------------+------------|
   |    | 2 |    170h    |  Disabled  |   IRQ15    |    N/A     |
   |----+---+------------+------------+------------+------------|
   |    | 3 |    170h    |  Disabled  |   IRQ12    |    N/A     |
   |----+---+------------+------------+------------+------------|
   |>>  | 4 |    170h    |    1E8h    |   IRQ15    |   IRQ11    |
   |----+---+------------+------------+------------+------------|
   |    | 5 |    170h    |    1E8h    |   IRQ15    |   IRQ12    |
   |----+---+------------+------------+------------+------------|
   |    | 6 |    1E8h    |  Disabled  |   IRQ11    |    N/A     |
   |----+---+------------+------------+------------+------------|
   |    | 7 |    1E8h    |  Disabled  |   IRQ12    |    N/A     |
   |----+---+------------+------------+------------+------------|
   |    | 8 |    1E8h    |    168h    |   IRQ11    |   IRQ10    |
   |----+---+------------+------------+------------+------------|
   |    | 9 |    1E8h    |    168h    |   IRQ11    |   IRQ12    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          IDE(AT) INTERFACE CONFIGURATION (CON'T)           |
   |------------------------------------------------------------|
   | Option |    J4/B    |    J4/C    |    J4/D    |     J9     |
   |--------+------------+------------+------------+------------|
   |    | 1 | Pins 1 & 2 | Pins 1 & 2 | Pins 2 & 3 | Pins 7 & 8 |
   |    |   |   closed   |   closed   |   closed   |   closed   |
   |----+---+------------+------------+------------+------------|
   |    | 2 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Pins 7 & 8 |
   |    |   |   closed   |   closed   |   closed   |   closed   |
   |----+---+------------+------------+------------+------------|
   |    | 3 | Pins 2 & 3 | Pins 2 & 3 | Pins 2 & 3 | Pins 5 & 7 |
   |    |   |   closed   |   closed   |   closed   |   closed   |
   |----+---+------------+------------+------------+------------|
   |>>  | 4 | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 |  Pins 7 &  |
   |    |   |   closed   |   closed   |   closed   |  8, 4 & 6  |
   |    |   |            |            |            |   closed   |
   |----+---+------------+------------+------------+------------|
   |    | 5 | Pins 1 & 2 | Pins 2 & 3 | Pins 2 & 3 |  Pins 7 &  |
   |    |   |   closed   |   closed   |   closed   |  8, 5 & 6  |
   |    |   |            |            |            |   closed   |
   |----+---+------------+------------+------------+------------|
   |    | 6 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 | Pins 4 & 6 |
   |    |   |   closed   |   closed   |   closed   |   closed   |
   |----+---+------------+------------+------------+------------|
   |    | 7 | Pins 2 & 3 | Pins 1 & 2 | Pins 1 & 2 | Pins 5 & 6 |
   |    |   |   closed   |   closed   |   closed   |   closed   |
   |----+---+------------+------------+------------+------------|
   |    | 8 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |  Pins 4 &  |
   |    |   |   closed   |   closed   |   closed   |  6, 1 & 3  |
   |    |   |            |            |            |   closed   |
   |----+---+------------+------------+------------+------------|
   |    | 9 | Pins 1 & 2 | Pins 1 & 2 | Pins 1 & 2 |  Pins 4 &  |
   |    |   |   closed   |   closed   |   closed   |  6, 3 & 5  |
   |    |   |            |            |            |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   BIOS ADDRESS SELECTION                   |
   |------------------------------------------------------------|
   |     Setting      |        J4/E        |        J4/F        |
   |------------------+--------------------+--------------------|
   |>> |    C800h     | Pins 1 & 2 closed  | Pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |    CC00h     | Pins 2 & 3 closed  | Pins 1 & 2 closed  |
   |---+--------------+--------------------+--------------------|
   |   |    D000h     | Pins 1 & 2 closed  | Pins 2 & 3 closed  |
   |---+--------------+--------------------+--------------------|
   |   |    E000h     | Pins 2 & 3 closed  | Pins 2 & 3 closed  |
   +------------------------------------------------------------+