ADAPTEC, INC.
=============

   AHA-3980W, AHA-3985W

   Data Bus      32-bit PCI                                       
   Card Size     Three-quarter length, full-height card           
   Card Drives   Up to 30 Fast and Wide SCSI devices (model       
   supported     AHA-3980W)                                       
                                                                  
                 Up to 45 Fast and Wide SCSI devices (model       
                 AHA-3985W)                                       
   Floppy drives None                                             
   supported     
                                                                  

<gopher://bitreich.org/I/th99/c/A-B/21013-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |     Function      | Location |     Function     | Location |
   |-------------------+----------+------------------+----------|
   | 4-pin connector - |    J3    | 68-pin SCSI      |    J8    |
   | drive active LED  |          | channel C        |          |
   |                   |          | connector -      |          |
   |                   |          | internal (model  |          |
   |                   |          | AHA-3985W only)  |          |
   |-------------------+----------+------------------+----------|
   | 68-pin SCSI       |    J4    | 68-pin SCSI      |   J12    |
   | channel A         |          | channel A        |          |
   | connector -       |          | connector -      |          |
   | internal          |          | external         |          |
   |-------------------+----------+------------------+----------|
   | 68-pin SCSI       |    J6    |                  |          |
   | channel B         |          |                  |          |
   | connector -       |          |                  |          |
   | internal          |          |                  |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                 | Label | Position |
   |-----------------------------------------+-------+----------|
   |>> | Channel A bus is connected to one   |  J2   |   Open   |
   |   | computer only                       |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Channel A bus is shared by two      |  J2   |  Closed  |
   |   | computers                           |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Channel B bus is connected to one   |  J5   |   Open   |
   |   | computer only                       |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Channel B bus is shared by two      |  J5   |  Closed  |
   |   | computers                           |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Channel C bus is connected to one   |  J7   |   Open   |
   |   | computer (AHA-3895W only)           |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Channel C bus is shared by two      |  J7   |  Closed  |
   |   | computers (AHA-3895W only)          |       |          |
   |---+-------------------------------------+-------+----------|
   |>> | Host computer supports PCI          |  J10  |   Open   |
   |   | interrupts A, B, C, & D             |       |          |
   |---+-------------------------------------+-------+----------|
   |   | Host computer supports PCI          |  J10  |  Closed  |
   |   | interrupts A & B only               |       |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |      Jumpers J2, J5 and J7 enable other adapter cards on   |
   |      different computers to share devices on channels      |
   |                                                            |
   |      A, B, and C (AHA-3895W only) with this adapter card.  |
   |      Device access is sequential.                          |
   +------------------------------------------------------------+