AMERICAN MULTISOURCE
====================

   AMS 1100SR4

   Data bus: 16-bit, ISA

   Size: Full-length, full-height card

   Hard drives supported:  Two RLL ST506/ST412 drive

   Floppy drives supported: Four 360KB, 720KB, 1.2MB, and 1.44MB

   Sector Interleave: 1:1

<gopher://bitreich.org/I/th99/c/A-B/20032-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                    Function                     | Location |
   |-------------------------------------------------+----------|
   | 34-pin control cable connector-hard drive       |    J1    |
   |-------------------------------------------------+----------|
   | 20-pin data cable connector-drive 0             |    J2    |
   |-------------------------------------------------+----------|
   | 20-pin data cable connector-drive 1             |    J3    |
   |-------------------------------------------------+----------|
   | 34-pin data cable connector-floppy drives 1 & 2 |    J4    |
   |-------------------------------------------------+----------|
   | 4-pin connector-drive active LED                |    J5    |
   |-------------------------------------------------+----------|
   | 34-pin data cable connector-floppy drives 3 & 4 |    J6    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Location  | Setting  |
   |-------------------------------------+-----------+----------|
   |>> | Floppy drive address 3F0-3F7h   |    W3     |   open   |
   |---+---------------------------------+-----------+----------|
   |   | Floppy drive address 370-377h   |    W3     |  closed  |
   |---+---------------------------------+-----------+----------|
   |>> | Hard drive address 1F0-1F7h     |    W4     |   open   |
   |---+---------------------------------+-----------+----------|
   |   | Hard drive address 170-177h     |    W4     |  closed  |
   |---+---------------------------------+-----------+----------|
   |>> | Floppy drive disabled           |  W5 & W7  |   open   |
   |---+---------------------------------+-----------+----------|
   |   | Floppy drive enabled            |  W5 & W7  |  closed  |
   |---+---------------------------------+-----------+----------|
   |>> | BIOS disabled                   |    W6     |   open   |
   |---+---------------------------------+-----------+----------|
   |   | BIOS enabled                    |    W6     |  closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |      Address       |        W8         |        W9         |
   |--------------------+-------------------+-------------------|
   |       C8000h       |      closed       |      closed       |
   |--------------------+-------------------+-------------------|
   |       CC000h       |      closed       |       open        |
   |--------------------+-------------------+-------------------|
   |       D0000h       |       open        |      closed       |
   |--------------------+-------------------+-------------------|
   |       D4000h       |       open        |       open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  HARD DRIVE CONFIGURATION                  |
   |------------------------------------------------------------|
   |      Function      |        W1        |         W2         |
   |--------------------+------------------+--------------------|
   |      Enabled       |       open       | pins 1 & 2 closed  |
   |--------------------+------------------+--------------------|
   |      Disabled      |      closed      | pins 2 & 3 closed  |
   +------------------------------------------------------------+