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

   ACB-2320D, ACB-2322D

   +------------------------------------------------------------+
   |------------------------------------------------------------|
   | Data bus:     | 16-bit, ISA                                |
   |---------------+--------------------------------------------|
   | Size:         | Half-length, full-height card              |
   |---------------+--------------------------------------------|
   | Hard drives   | Two RLL ESDI drives                        |
   | supported:    |                                            |
   |---------------+--------------------------------------------|
   | Floppy drives | ACB-2320D: None                            |
   | supported:    |                                            |
   |               | ACB-2322D: Two 360KB, 720KB, 1.2MB, 1.44MB |
   |               | drives                                     |
   +------------------------------------------------------------+

<gopher://bitreich.org/I/th99/c/A-B/20017-1.png>
    

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                  Function                  |   Location    |
   |--------------------------------------------+---------------|
   |  4-pin connector-drive active LED          |  J1           |
   |--------------------------------------------+---------------|
   |  20-pin data cable connector-drive 1       |  J2           |
   |--------------------------------------------+---------------|
   |  20-pin data cable connector-drive 0       |  J3           |
   |--------------------------------------------+---------------|
   |  34-pin control cable connector-hard drive |  J4           |
   |--------------------------------------------+---------------|
   |  34-pin data cable connector-floppy drive  |  J5           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            |   Location   |   Setting   |
   |-------------------------------+--------------+-------------|
   |>> |  Not used                 |  J7/jumper 1 |  open       |
   |---+---------------------------+--------------+-------------|
   |>> |  Logical drive splitting  |  J7/jumper 2 |  open       |
   |   |  option disabled          |              |             |
   |---+---------------------------+--------------+-------------|
   |   |  Logical drive splitting  |  J7/jumper 2 |  closed     |
   |   |  option enabled           |              |             |
   |---+---------------------------+--------------+-------------|
   |>> |  Not used                 |  J7/jumper 3 |  open       |
   |---+---------------------------+--------------+-------------|
   |>> |  Not used                 |  J7/jumper 4 |  open       |
   |---+---------------------------+--------------+-------------|
   |>> |  Read ahead cache enabled |  J7/jumper 5 |  open       |
   |---+---------------------------+--------------+-------------|
   |   |  Read ahead cache         |  J7/jumper 5 |  closed     |
   |   |  disabled                 |              |             |
   |---+---------------------------+--------------+-------------|
   |>> |  Not used                 |  J7/jumper 6 |  open       |
   |---+---------------------------+--------------+-------------|
   |>> |  Not used                 |  J7/jumper 7 |  open       |
   |---+---------------------------+--------------+-------------|
   |>> |  Hard drive port address  |  J10/jumper  |  open       |
   |   |  is 1F0-1F7h              |  1           |             |
   |---+---------------------------+--------------+-------------|
   |   |  Hard drive port address  |  J10/jumper  |  closed     |
   |   |  is 170-177h              |  1           |             |
   |---+---------------------------+--------------+-------------|
   |>> |  Floppy drive port        |  J10/jumper  |  open       |
   |   |  address is 3F0-3F7h      |  2           |             |
   |---+---------------------------+--------------+-------------|
   |   |  Floppy drive port        |  J10/jumper  |  closed     |
   |   |  address is 370-377h      |  2           |             |
   |---+---------------------------+--------------+-------------|
   |>> |  Floppy drive enabled     |  J10/jumper  |  open       |
   |   |                           |  3           |             |
   |---+---------------------------+--------------+-------------|
   |   |  Floppy drive disabled    |  J10/jumper  |  closed     |
   |   |                           |  3           |             |
   |---+---------------------------+--------------+-------------|
   |>> |  Single-speed floppy      |  J11/jumper  |  open       |
   |   |  enabled                  |  1           |             |
   |---+---------------------------+--------------+-------------|
   |   |  Dual-speed floppy        |  J11/jumper  |  closed     |
   |   |  enabled                  |  1           |             |
   |---+---------------------------+--------------+-------------|
   |>> |  Hard Drive Interrupt is  |  J13         |  pins 1 & 2 |
   |   |  IRQ14                    |              |  closed     |
   |---+---------------------------+--------------+-------------|
   |   |  Hard Drive Interrupt is  |  J13         |  pins 2 & 3 |
   |   |  IRQ15                    |              |  closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |    Address    | J12/jumper 1 | J12/jumper 2 | J12/jumper 3 |
   |---------------+--------------+--------------+--------------|
   |>> |  C8000h   |  open        |  open        |  open        |
   |---+-----------+--------------+--------------+--------------|
   |   |  CC000h   |  closed      |  open        |  open        |
   |---+-----------+--------------+--------------+--------------|
   |   |  D0000h   |  open        |  closed      |  open        |
   |---+-----------+--------------+--------------+--------------|
   |   |  D4000h   |  closed      |  closed      |  open        |
   |---+-----------+--------------+--------------+--------------|
   |   |  Disabled |  open        |  open        |  closed      |
   |---+-----------+--------------+--------------+--------------|
   |   |  D8000h   |  closed      |  open        |  closed      |
   |---+-----------+--------------+--------------+--------------|
   |   |  DC000h   |  open        |  closed      |  closed      |
   +------------------------------------------------------------+