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

   ACB-2370B

   Data bus:                16-bit, ISA                           
   Size:                    Half-length, full-height card         
   Hard drives supported:   Two RLL ST506 drives                  
   Floppy drives supported: None                                  

<gopher://bitreich.org/I/th99/c/A-B/20019-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                 Function                  |    Location    |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 1       |       J1       |
   |-------------------------------------------+----------------|
   | 20-pin data cable connector-drive 0       |       J2       |
   |-------------------------------------------+----------------|
   | 34-pin control cable connector-hard drive |       J3       |
   |-------------------------------------------+----------------|
   | 3-pin connector-drive active LED          |       J5       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function              | Location |  Setting   |
   |------------------------------------+----------+------------|
   |>> | Hard drive port address        |  J6 - 1  |    open    |
   |   | 1F0-1F7h                       |          |            |
   |---+--------------------------------+----------+------------|
   |   | Hard drive port address        |  J6 - 1  |   closed   |
   |   | 170-177h                       |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Not used                       |  J6 - 2  |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Zero wait state disabled       |  J6 - 3  |    open    |
   |---+--------------------------------+----------+------------|
   |   | Zero wait state enabled        |  J6 - 3  |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Step rate is 16 mseconds and   |  J6 - 4  |    open    |
   |   | recalibrate to 0               |          |            |
   |---+--------------------------------+----------+------------|
   |   | Step rate is 35msec. and       |  J6 - 4  |   closed   |
   |   | recalibrate to 0 minus 1       |          |            |
   |---+--------------------------------+----------+------------|
   |>> | Read ahead cache enabled       |  J6 - 5  |    open    |
   |---+--------------------------------+----------+------------|
   |   | Read ahead cache disable       |  J6 - 5  |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Not used                       |  J6 - 6  |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Not used                       |  J6 - 7  |    open    |
   |---+--------------------------------+----------+------------|
   |>> | Hard drive Interrupt is IRQ14  |   J13    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | Hard drive Interrupt is IRQ15  |   J13    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |>> | Not used                       |   J13    | pins 3 & 4 |
   |   |                                |          |    open    |
   |---+--------------------------------+----------+------------|
   |>> | BIOS address C800h             |   J14    | pins 1 & 2 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | BIOS address CC00h             |   J14    | pins 2 & 3 |
   |   |                                |          |   closed   |
   |---+--------------------------------+----------+------------|
   |   | BIOS disabled                  |   J14    |    open    |
   +------------------------------------------------------------+