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

   AHA-1540B, AHA-1542B

   (Also Sold as the Maynard HA-101S)

   Data bus:           16-bit, ISA                                
   Size:               Three-quarter length, full-height card     
   Hard drives         Up to seven SCSI devices                   
   supported:          
   Floppy drives       Two 360KB, 720KB, 1.2MB or 1.44MB          
   supported:          (AHA-1542B)                                
                                                                  
                       None (AHA-1540B, HA-101S)                  

<gopher://bitreich.org/I/th99/c/A-B/20028-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                 |    Location     |
   |------------------------------------------+-----------------|
   | 34-pin data cable connector-floppy drive |       CN1       |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector-internal           |       CN2       |
   |------------------------------------------+-----------------|
   | 50-pin SCSI connector-external           |       CN3       |
   |------------------------------------------+-----------------|
   | 4-pin connector-drive active LED         |       CN4       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        SCSI ADDRESS                        |
   |------------------------------------------------------------|
   |   Select   |  J5/jumper 4  |  J5/jumper 5  |  J5/jumper 6  |
   |------------+---------------+---------------+---------------|
   |>>  |   7   |     open      |     open      |     open      |
   |----+-------+---------------+---------------+---------------|
   |    |   6   |    closed     |     open      |     open      |
   |----+-------+---------------+---------------+---------------|
   |    |   5   |     open      |    closed     |     open      |
   |----+-------+---------------+---------------+---------------|
   |    |   4   |    closed     |    closed     |     open      |
   |----+-------+---------------+---------------+---------------|
   |    |   3   |     open      |     open      |    closed     |
   |----+-------+---------------+---------------+---------------|
   |    |   2   |    closed     |     open      |    closed     |
   |----+-------+---------------+---------------+---------------|
   |    |   1   |     open      |    closed     |    closed     |
   |----+-------+---------------+---------------+---------------|
   |    |   0   |    closed     |    closed     |    closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function              |   Location   | Setting |
   |-----------------------------------+--------------+---------|
   |>> | SCSI synchronous negotiation  | J5/jumper 1  |  open   |
   |   | disabled                      |              |         |
   |---+-------------------------------+--------------+---------|
   |   | SCSI synchronous negotiation  | J5/jumper 1  | closed  |
   |   | enabled                       |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Normal operation              | J5/jumper 2  |  open   |
   |---+-------------------------------+--------------+---------|
   |   | Self diagnostics enabled      | J5/jumper 2  | closed  |
   |---+-------------------------------+--------------+---------|
   |>> | SCSI parity check enabled     | J5/jumper 3  |  open   |
   |---+-------------------------------+--------------+---------|
   |   | SCSI parity check disabled    | J5/jumper 3  | closed  |
   |---+-------------------------------+--------------+---------|
   |>> | BIOS enabled                  | J6/jumper 1  | closed  |
   |---+-------------------------------+--------------+---------|
   |   | BIOS disabled                 | J6/jumper 1  |  open   |
   |---+-------------------------------+--------------+---------|
   |>> | Not used                      |  J6/jumpers  |  open   |
   |   |                               |     2-4      |         |
   |---+-------------------------------+--------------+---------|
   |>> | Auto sense enabled            | J6/jumper 5  |  open   |
   |---+-------------------------------+--------------+---------|
   |   | Auto sense disable            | J6/jumper 5  | closed  |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive port address     | J7/jumper 1  |  open   |
   |   | 3F0-3F7h                      |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive port address     | J7/jumper 1  | closed  |
   |   | 370-377h                      |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive enabled          | J8/jumper 1  | closed  |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive disabled         | J8/jumper 1  |  open   |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive DMA Request is   | J8/jumper 2  | closed  |
   |   | DREQ2                         |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive DMA Request is   | J8/jumper 3  | closed  |
   |   | DREQ3                         |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive DMA Acknowledge  | J8/jumper 4  | closed  |
   |   | Is DACK2                      |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive DMA Acknowledge  | J8/jumper 5  | closed  |
   |   | is DACK3                      |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive Interrupt is     | J8/jumper 6  | closed  |
   |   | IRQ6                          |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive Interrupt is     | J8/jumper 7  | closed  |
   |   | IRQ10                         |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive dual speed       | J8/jumper 8  |  open   |
   |   | disabled                      |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive dual speed       | J8/jumper 8  | closed  |
   |   | enabled                       |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | AT Bus DMA Request is DREQ5   | J9/jumper 2  | closed  |
   |---+-------------------------------+--------------+---------|
   |   | AT Bus DMA Request is DREQ0   | J9/jumper 1  | closed  |
   |---+-------------------------------+--------------+---------|
   |   | AT Bus DMA Request is DREQ6   | J9/jumper 3  | closed  |
   |---+-------------------------------+--------------+---------|
   |   | AT Bus DMA Request is DREQ7   | J9/jumper 4  | closed  |
   |---+-------------------------------+--------------+---------|
   |   | AT Bus DMA Acknowledge is     | J9/jumper 5  | closed  |
   |   | DACK0                         |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | AT Bus DMA Acknowledge is     | J9/jumper 6  | closed  |
   |   | DACK5                         |              |         |
   |---+-------------------------------+--------------+---------|
   |   | AT Bus DMA Acknowledge is     | J9/jumper 7  | closed  |
   |   | DACK6                         |              |         |
   |---+-------------------------------+--------------+---------|
   |   | AT Bus DMA Acknowledge is     | J9/jumper 8  | closed  |
   |   | DACK7                         |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Hard drive Interrupt is IRQ9  | J9/jumper 9  | closed  |
   |---+-------------------------------+--------------+---------|
   |   | Hard drive Interrupt is IRQ10 | J9/jumper 10 | closed  |
   |---+-------------------------------+--------------+---------|
   |>> | Hard drive Interrupt is IRQ11 | J9/jumper 11 | closed  |
   |---+-------------------------------+--------------+---------|
   |   | Hard drive Interrupt is IRQ12 | J9/jumper 12 | closed  |
   |---+-------------------------------+--------------+---------|
   |   | Hard drive Interrupt is IRQ14 | J9/jumper 13 | closed  |
   |---+-------------------------------+--------------+---------|
   |   | Hard drive Interrupt is IRQ15 | J9/jumper 14 | closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        DMA CHANNEL                         |
   |------------------------------------------------------------|
   |       DRQ        |    J5/jumper 7     |    J5/jumper 8     |
   |------------------+--------------------+--------------------|
   |>> |      5       |        open        |       closed       |
   |---+--------------+--------------------+--------------------|
   |   |      6       |       closed       |        open        |
   |---+--------------+--------------------+--------------------|
   |   |      7       |        open        |        open        |
   |---+--------------+--------------------+--------------------|
   |   |      0       |       closed       |       closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     INTERRUPT REQUEST                      |
   |------------------------------------------------------------|
   |    IRQ     |  J5/jumper 9  | J5/jumper 10  | J5/jumper 11  |
   |------------+---------------+---------------+---------------|
   |   |   9    |     open      |     open      |     open      |
   |---+--------+---------------+---------------+---------------|
   |   |   10   |    closed     |     open      |     open      |
   |---+--------+---------------+---------------+---------------|
   |>> |   11   |     open      |    closed     |     open      |
   |---+--------+---------------+---------------+---------------|
   |   |   12   |    closed     |    closed     |     open      |
   |---+--------+---------------+---------------+---------------|
   |   |   14   |     open      |     open      |    closed     |
   |---+--------+---------------+---------------+---------------|
   |   |   15   |    closed     |     open      |    closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DMA TRANSFER RATE                      |
   |------------------------------------------------------------|
   |       Speed       |    J5/jumper 12    |   J5/jumper 13    |
   |-------------------+--------------------+-------------------|
   |   |    5.0Mb/s    |        open        |       open        |
   |---+---------------+--------------------+-------------------|
   |>> |    5.7Mb/s    |       closed       |       open        |
   |---+---------------+--------------------+-------------------|
   |   |    6.7Mb/s    |        open        |      closed       |
   |---+---------------+--------------------+-------------------|
   |   |    8.0Mb/s    |       closed       |      closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      I/O PORT ADDRESS                      |
   |------------------------------------------------------------|
   |    Address    | J7/jumper 2  | J7/jumper 3  | J7/jumper 4  |
   |---------------+--------------+--------------+--------------|
   |>> |  i 334h   |     open     |     open     |     open     |
   |---+-----------+--------------+--------------+--------------|
   |>> |   330h    |    closed    |     open     |     open     |
   |---+-----------+--------------+--------------+--------------|
   |   |   234h    |     open     |    closed    |     open     |
   |---+-----------+--------------+--------------+--------------|
   |   |   230h    |    closed    |    closed    |     open     |
   |---+-----------+--------------+--------------+--------------|
   |   |   134h    |     open     |     open     |    closed    |
   |---+-----------+--------------+--------------+--------------|
   |   |   130h    |    closed    |     open     |    closed    |
   |---+-----------+--------------+--------------+--------------|
   |   | Not used  |    closed    |    closed    |    closed    |
   |------------------------------------------------------------|
   | Note: >>i denotes default for 1540BS11/1542BS11             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       BUS WAIT STATE                       |
   |------------------------------------------------------------|
   |     Wait Time      |    J7/jumper 5    |    J7/jumper 6    |
   |--------------------+-------------------+-------------------|
   |>> |    Disable     |       open        |       open        |
   |---+----------------+-------------------+-------------------|
   |   |    100nsec     |      closed       |       open        |
   |---+----------------+-------------------+-------------------|
   |   |    200nsec     |       open        |      closed       |
   |---+----------------+-------------------+-------------------|
   |   |    300nsec     |      closed       |      closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                MISCELLANEOUS TECHNICAL NOTE                |
   |------------------------------------------------------------|
   | Note: Manufacturer documentation does not specify possible |
   | BIOS memory addresses, but a selection of DC00:6 has been  |
   |              recommended by some card users.               |
   +------------------------------------------------------------+