INTELLIGENT COMPUTER PERIPHERALS
================================

   GDT6550

   Maximum Onboard Memory  32MB                                   
   Data Bus                32-bit PCI                             
   Card Size               Full-height, full-length card          
   Hard Drives Supported   Up to 35 SCSI devices                  
   Floppy Drives Supported None                                   
   RAID Levels Supported   RAID 0, 1, 4, 5                        

<gopher://bitreich.org/I/th99/c/I-L/21053-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function       | Label |      Function       | Label |
   |----------------------+-------+---------------------+-------|
   | 50-pin SCSI          |  J1   | 50-pin SCSI         |  J5   |
   | connector -          |       | connector -         |       |
   | external, channel A  |       | internal, channel D |       |
   |----------------------+-------+---------------------+-------|
   | 50-pin SCSI          |  J2   | 50-pin SCSI         |  J6   |
   | connector -          |       | connector -         |       |
   | internal, channel A  |       | internal, channel C |       |
   |----------------------+-------+---------------------+-------|
   | Drive active LEDs -  |  J3   | 50-pin SCSI         |  J7   |
   | see pinout below     |       | connector -         |       |
   |                      |       | internal, channel E |       |
   |----------------------+-------+---------------------+-------|
   | 50-pin SCSI          |  J4   |                     |       |
   | connector -          |       |                     |       |
   | internal, channel B  |       |                     |       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         J3 PINOUT                          |
   |------------------------------------------------------------|
   |       Function        | Pin  |       Function       | Pin  |
   |-----------------------+------+----------------------+------|
   | Channel A common      |  1   | Channel C active     |  6   |
   |-----------------------+------+----------------------+------|
   | Channel A active      |  2   | Channel D common     |  7   |
   |-----------------------+------+----------------------+------|
   | Channel B common      |  3   | Channel D active     |  8   |
   |-----------------------+------+----------------------+------|
   | Channel B active      |  4   | Channel E common     |  9   |
   |-----------------------+------+----------------------+------|
   | Channel C common      |  5   | Channel E active     |  10  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                 | Label | Position |
   |-----------------------------------------+-------+----------|
   |>> | Active termination power enabled    |  TA   |  Closed  |
   |   | for channel A                       |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Active termination power disabled   |  TA   |   Open   |
   |   | for channel A                       |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Active termination power enabled    |  TB   |  Closed  |
   |   | for channel B                       |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Active termination power disabled   |  TB   |   Open   |
   |   | for channel B                       |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Active termination power enabled    |  TC   |  Closed  |
   |   | for channel C                       |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Active termination power disabled   |  TC   |   Open   |
   |   | for channel C                       |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Active termination power enabled    |  TD   |  Closed  |
   |   | for channel D                       |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Active termination power disabled   |  TD   |   Open   |
   |   | for channel D                       |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Active termination power enabled    |  TE   |  Closed  |
   |   | for channel E                       |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Active termination power disabled   |  TE   |   Open   |
   |   | for channel E                       |       |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |            Size            |            Bank 0             |
   |----------------------------+-------------------------------|
   |            4MB             |          (1) 1M x 32          |
   |----------------------------+-------------------------------|
   |            8MB             |          (1) 2M x 32          |
   |----------------------------+-------------------------------|
   |            16MB            |          (1) 4M x 32          |
   |----------------------------+-------------------------------|
   |            32MB            |          (1) 8M x 32          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DIAGNOSTIC LED(S)                      |
   |------------------------------------------------------------|
   | LED | Color  | Status |             Condition              |
   |-----+--------+--------+------------------------------------|
   |  A  | Yellow |   On   |      SCSI channel A is active      |
   |-----+--------+--------+------------------------------------|
   |  A  | Yellow |  Off   |    SCSI channel A is not active    |
   |-----+--------+--------+------------------------------------|
   |  B  | Yellow |   On   |      SCSI channel B is active      |
   |-----+--------+--------+------------------------------------|
   |  B  | Yellow |  Off   |    SCSI channel B is not active    |
   |-----+--------+--------+------------------------------------|
   |  C  | Yellow |   On   |      SCSI channel C is active      |
   |-----+--------+--------+------------------------------------|
   |  C  | Yellow |  Off   |    SCSI channel C is not active    |
   |-----+--------+--------+------------------------------------|
   |  D  | Yellow |   On   |      SCSI channel D is active      |
   |-----+--------+--------+------------------------------------|
   |  D  | Yellow |  Off   |    SCSI channel D is not active    |
   |-----+--------+--------+------------------------------------|
   |  E  | Yellow |   On   |      SCSI channel E is active      |
   |-----+--------+--------+------------------------------------|
   |  E  | Yellow |  Off   |    SCSI channel E is not active    |
   |-----+--------+--------+------------------------------------|
   |  T  | Green  |   On   |     Direct memory access is in     |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   |  T  | Green  |  Off   |   Direct memory access is not in   |
   |     |        |        |              progress              |
   |-----+--------+--------+------------------------------------|
   |  S  | Green  |   On   |     Card is operating normally     |
   |-----+--------+--------+------------------------------------|
   |  S  | Green  |  Off   |       An error has occurred        |
   +------------------------------------------------------------+