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

   ACB-2372B

   Data bus:                16-bit, ISA                           
   Size:                    Half-length, full-height card         
   Hard drives supported:   2 RLL ST506 drives                    
   Floppy drives supported: Two 360KB, 720KB, 1.2MB, or 1.44MB    

<gopher://bitreich.org/I/th99/c/A-B/20020-1.png>
    

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                  |    Location    |
   |-------------------------------------------+----------------|
   | 34-pin data cable connector-floppy drive  |       J1       |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 1       |       J3       |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 0       |       J4       |
   |-------------------------------------------+----------------|
   | 34-pin control cable connector-hard drive |       J5       |
   |-------------------------------------------+----------------|
   | 3-pin connector-drive active LED          |       J6       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             |  Location   |  Setting   |
   |---------------------------------+-------------+------------|
   |>> | Hard drive address 1F0-1F7h |    J2- 1    |    open    |
   |---+-----------------------------+-------------+------------|
   |   | Hard drive address 170-177h |    J2- 1    |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Floppy drive address        |    J2- 2    |    open    |
   |   | 3F0-3F7h                    |             |            |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive address        |    J2- 2    |   closed   |
   |   | 370-377h                    |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Zero wait state disabled    |    J2- 3    |    open    |
   |---+-----------------------------+-------------+------------|
   |   | Zero wait state enabled     |    J2- 3    |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | 16msec step rate and        |    J2- 4    |    open    |
   |   | recalibrate to 0            |             |            |
   |---+-----------------------------+-------------+------------|
   |   | 35msec step rate and        |    J2- 4    |   closed   |
   |   | recalibrate to 0 minus 1    |             |            |
   |---+-----------------------------+-------------+------------|
   |>> | Read ahead cache enabled    |    J2- 5    |    open    |
   |---+-----------------------------+-------------+------------|
   |   | Read ahead cache disabled   |    J2- 5    |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Not used                    |    J2-6     |    open    |
   |---+-----------------------------+-------------+------------|
   |>> | Not used                    |    J2-7     |    open    |
   |---+-----------------------------+-------------+------------|
   |>> | BIOS address C800h          |     J7      | pins 1 & 2 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | BIOS address CC00h          |     J7      | pins 2 & 3 |
   |   |                             |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | BIOS address disabled       | J7/pin 2 to |   closed   |
   |   |                             |   top pin   |            |
   |---+-----------------------------+-------------+------------|
   |>> | Hard drive Interrupt is     |     J13     | pins 1 & 2 |
   |   | IRQ14                       |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Hard drive Interrupt is     |     J13     | pins 2 & 3 |
   |   | IRQ15                       |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Floppy drive DMA Request is |     J20     | pins 1 & 2 |
   |   | DREQ2                       |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive DMA Request is |     J20     | pins 2 & 3 |
   |   | DREQ3                       |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Floppy drive DMA            |     J21     | pins 1 & 2 |
   |   | Acknowledge Is DACK2        |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive DMA            |     J21     | pins 2 & 3 |
   |   | Acknowledge is DACK3        |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |>> | Floppy drive Interrupt is   |     J22     | pins 1 & 2 |
   |   | IRQ6                        |             |   closed   |
   |---+-----------------------------+-------------+------------|
   |   | Floppy drive Interrupt is   |     J22     | pins 2 & 3 |
   |   | IRQ10                       |             |   closed   |
   +------------------------------------------------------------+