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

   AHA-1540

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:                | 16-bit ISA                      |
   |--------------------------+---------------------------------|
   | Size:                    | Full-length, full-height card   |
   |--------------------------+---------------------------------|
   | Hard drive supported:    | Up to seven SCSI drives         |
   |--------------------------+---------------------------------|
   | Floppy drives supported: | None                            |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/A-B/20816-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                Function                |     Location      |
   |----------------------------------------+-------------------|
   | 50-pin SCSI connector - internal       |        CN1        |
   |----------------------------------------+-------------------|
   | 2-pin connector - drive active LED     |        LED        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Location | Setting |
   |---------------------------------------+----------+---------|
   |>> | Synchronous negotiation disabled  |   J1/A   |  open   |
   |---+-----------------------------------+----------+---------|
   |   | Synchronous negotiation enabled   |   J1/A   | closed  |
   |---+-----------------------------------+----------+---------|
   |>> | Factory configured - do not alter |   J1/B   |  open   |
   |---+-----------------------------------+----------+---------|
   |>> | Parity enabled                    |   J1/C   |  open   |
   |---+-----------------------------------+----------+---------|
   |   | Parity disabled                   |   J1/C   | closed  |
   |---+-----------------------------------+----------+---------|
   |>> | Wait state disabled               |    J4    |   N/A   |
   |---+-----------------------------------+----------+---------|
   |   | Wait state enabled                |    J4    |   N/A   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SCSI ADDRESS CONFIGURATION                 |
   |------------------------------------------------------------|
   |   Address     |     J1/D     |     J1/E     |     J1/F     |
   |---------------+--------------+--------------+--------------|
   |>>  |    7     |     open     |     open     |     open     |
   |----+----------+--------------+--------------+--------------|
   |    |    0     |    closed    |    closed    |    closed    |
   |----+----------+--------------+--------------+--------------|
   |    |    1     |     open     |    closed    |    closed    |
   |----+----------+--------------+--------------+--------------|
   |    |    2     |    closed    |     open     |    closed    |
   |----+----------+--------------+--------------+--------------|
   |    |    3     |     open     |     open     |    closed    |
   |----+----------+--------------+--------------+--------------|
   |    |    4     |    closed    |    closed    |     open     |
   |----+----------+--------------+--------------+--------------|
   |    |    5     |     open     |    closed    |     open     |
   |----+----------+--------------+--------------+--------------|
   |    |    6     |    closed    |     open     |     open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   DMA CHANNEL SELECTION                    |
   |------------------------------------------------------------|
   | Channel  |  J1/G   |  J1/H   |  J6/A   |  J6/B   |  J6/C   |
   |----------+---------+---------+---------+---------+---------|
   |>>  |  5  |  open   | closed  |  open   | closed  |  open   |
   |----+-----+---------+---------+---------+---------+---------|
   |    |  0  | closed  | closed  | closed  |  open   |  open   |
   |----+-----+---------+---------+---------+---------+---------|
   |    |  6  | closed  |  open   |  open   |  open   | closed  |
   |----+-----+---------+---------+---------+---------+---------|
   |    |  7  |  open   |  open   |  open   |  open   |  open   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               DMA CHANNEL SELECTION (CON'T)                |
   |------------------------------------------------------------|
   | Channel  |  J6/D   |  J7/A   |  J7/B   |  J7/C   |  J7/D   |
   |----------+---------+---------+---------+---------+---------|
   |>>  |  5  |  open   |  open   | closed  |  open   |  open   |
   |----+-----+---------+---------+---------+---------+---------|
   |    |  0  |  open   | closed  |  open   |  open   |  open   |
   |----+-----+---------+---------+---------+---------+---------|
   |    |  6  |  open   |  open   |  open   | closed  |  open   |
   |----+-----+---------+---------+---------+---------+---------|
   |    |  7  | closed  |  open   |  open   |  open   | closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   AT INTERRUPT SELECTION                   |
   |------------------------------------------------------------|
   |     IRQ       |  J1/I  |  J1/J  |  J1/K  |  J8/A  |  J8/B  |
   |---------------+--------+--------+--------+--------+--------|
   |>> |    11     |  open  | closed |  open  |  open  |  open  |
   |---+-----------+--------+--------+--------+--------+--------|
   |   |     9     |  open  |  open  |  open  | closed |  open  |
   |---+-----------+--------+--------+--------+--------+--------|
   |   |    10     | closed |  open  |  open  |  open  | closed |
   |---+-----------+--------+--------+--------+--------+--------|
   |   |    12     | closed | closed |  open  |  open  |  open  |
   |---+-----------+--------+--------+--------+--------+--------|
   |   |    14     |  open  |  open  | closed |  open  |  open  |
   |---+-----------+--------+--------+--------+--------+--------|
   |   |    15     | closed |  open  | closed |  open  |  open  |
   |---+-----------+--------+--------+--------+--------+--------|
   |   |    Not    |  open  | closed | closed |  N/A   |  N/A   |
   |   |  defined  |        |        |        |        |        |
   |---+-----------+--------+--------+--------+--------+--------|
   |   |    Not    | closed | closed | closed |  N/A   |  N/A   |
   |   |  defined  |        |        |        |        |        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               AT INTERRUPT SELECTION (CON'T)               |
   |------------------------------------------------------------|
   |    IRQ     |   J8/C    |   J8/D    |   J8/E    |   J8/F    |
   |------------+-----------+-----------+-----------+-----------|
   |>> |   11   |  closed   |   open    |   open    |   open    |
   |---+--------+-----------+-----------+-----------+-----------|
   |   |   9    |   open    |   open    |   open    |   open    |
   |---+--------+-----------+-----------+-----------+-----------|
   |   |   10   |   open    |   open    |   open    |   open    |
   |---+--------+-----------+-----------+-----------+-----------|
   |   |   12   |   open    |  closed   |   open    |   open    |
   |---+--------+-----------+-----------+-----------+-----------|
   |   |   14   |   open    |   open    |  closed   |   open    |
   |---+--------+-----------+-----------+-----------+-----------|
   |   |   15   |   open    |   open    |   open    |  closed   |
   +------------------------------------------------------------+

   +---------------------------------------------------------------+
   |                    PORT ADDRESS SELECTION                     |
   |---------------------------------------------------------------|
   |Address| J9/A | J9/B | J9/C | J9/D | J9/E | J9/F | J9/G | J9/H |
   |-------+------+------+------+------+------+------+------+------|
   |>> |330h| open | open |closed|closed| open | open |closed|closed|
   |--+----+------+------+------+------+------+------+------+------|
   |  |004h|closed| open | open | open | open | open | open | open |
   |--+----+------+------+------+------+------+------+------+------|
   |  |008h| open |closed| open | open | open | open | open | open |
   |--+----+------+------+------+------+------+------+------+------|
   |  |010h| open | open |closed| open | open | open | open | open |
   |--+----+------+------+------+------+------+------+------+------|
   |  |020h| open | open | open |closed| open | open | open | open |
   |--+----+------+------+------+------+------+------+------+------|
   |  |040h| open | open | open | open |closed| open | open | open |
   |--+----+------+------+------+------+------+------+------+------|
   |  |080h| open | open | open | open | open |closed| open | open |
   |--+----+------+------+------+------+------+------+------+------|
   |  |100h| open | open | open | open | open | open |closed| open |
   |--+----+------+------+------+------+------+------+------+------|
   |  |200h| open | open | open | open | open | open | open |closed|
   +---------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 AT BIOS ADDRESS SELECTION                  |
   |------------------------------------------------------------|
   |     Address      |    J10/A     |   J10/B    |    J10/C    |
   |------------------+--------------+------------+-------------|
   |>> |    DC000h    |     open     |    open    |    open     |
   |---+--------------+--------------+------------+-------------|
   |   |    C8000h    |    closed    |    open    |   closed    |
   |---+--------------+--------------+------------+-------------|
   |   |    D8000h    |     open     |    open    |   closed    |
   |---+--------------+--------------+------------+-------------|
   |   |    CC000h    |    closed    |    open    |    open     |
   +------------------------------------------------------------+