AMERICAN MEGATRENDS, INC.
=========================

   FAST DISK VLB

    Data bus:           32-bit, VL-bus                            

    Size:               Three/quarter-length, full-height card    

    Hard drive          Up to seven SCSI devices                  
    supported:          

    Floppy drives       Two 360KB, 720KB, 1.2MB, or 1.44MB        
    supported:          drives                                    

<gopher://bitreich.org/I/th99/c/A-B/20435-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |                  Function                   |   Location   |
   |---------------------------------------------+--------------|
   | 4-pin connector-Drive active LED            |      J1      |
   |---------------------------------------------+--------------|
   | 20-pin factory test connector               |      J2      |
   |---------------------------------------------+--------------|
   | 34-pin control cable connector-floppy drive |      J3      |
   |---------------------------------------------+--------------|
   | 50-pin SCSI connector - internal            |      J4      |
   |---------------------------------------------+--------------|
   | 50-pin SCSI connector - external            |      J6      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function            |   Location   |  Setting   |
   |--------------------------------+--------------+------------|
   |>> | SCSI termination enabled   |      J8      |   closed   |
   |---+----------------------------+--------------+------------|
   |   | SCSI termination disabled  |      J8      |    open    |
   |---+----------------------------+--------------+------------|
   |>> | Local Bus speed < 50MHz    |     J11      | pins 2 & 3 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |   | Local Bus speed > 50MHz    |     J11      | pins 1 & 2 |
   |   |                            |              |   closed   |
   |---+----------------------------+--------------+------------|
   |>> | ISA mode enabled           | SW1/switch 6 |    off     |
   |---+----------------------------+--------------+------------|
   |   | EISA mode enabled          | SW1/switch 6 |     on     |
   |---+----------------------------+--------------+------------|
   |>> | Hard drive capacity > 1GB  | SW2/switch 1 |    off     |
   |   | disabled                   |              |            |
   |---+----------------------------+--------------+------------|
   |   | Hard drive capacity > 1GB  | SW2/switch 1 |     on     |
   |   | enabled                    |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Cache memory enabled       | SW2/switch 2 |    off     |
   |---+----------------------------+--------------+------------|
   |   | Cache memory disabled      | SW2/switch 2 |     on     |
   |---+----------------------------+--------------+------------|
   |>> | Single-sector commands     | SW2/switch 3 |    off     |
   |   | separate caching disabled  |              |            |
   |---+----------------------------+--------------+------------|
   |   | Single-sector commands     | SW2/switch 3 |     on     |
   |   | separate caching enabled   |              |            |
   |---+----------------------------+--------------+------------|
   |>> | Caching for removable      | SW2/switch 4 |    off     |
   |   | drives disabled            |              |            |
   |---+----------------------------+--------------+------------|
   |   | Caching for removable      | SW2/switch 4 |     on     |
   |   | drives enabled             |              |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function              |   Location   | Setting |
   |-----------------------------------+--------------+---------|
   |>> | Delayed write caching enabled | SW2/switch 5 |   off   |
   |---+-------------------------------+--------------+---------|
   |   | Write-through caching enabled | SW2/switch 5 |   on    |
   |---+-------------------------------+--------------+---------|
   |>> | SCSI autoselection time-out   | SW2/switch 6 |   off   |
   |   | enabled                       |              |         |
   |---+-------------------------------+--------------+---------|
   |   | SCSI autoselection time-out   | SW2/switch 6 |   on    |
   |   | disabled                      |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | SCSI synchronous negotiation  | SW3/switch 4 |   off   |
   |   | enabled                       |              |         |
   |---+-------------------------------+--------------+---------|
   |   | SCSI synchronous negotiation  | SW3/switch 4 |   on    |
   |   | disabled                      |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | SCSI 10MB/sec data transfer   | SW3/switch 5 |   off   |
   |   | rate enabled                  |              |         |
   |---+-------------------------------+--------------+---------|
   |   | SCSI 5MB/sec data transfer    | SW3/switch 5 |   on    |
   |   | rate enabled                  |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Adaptec 154x-type target      | SW3/switch 6 |   off   |
   |   | allocation disabled           |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Adaptec 154x-type target      | SW3/switch 6 |   on    |
   |   | allocation enabled            |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | 32-bit operation (Extended    | SW3/switch 7 |   off   |
   |   | Mode) enabled                 |              |         |
   |---+-------------------------------+--------------+---------|
   |   | 32-bit operation (Extended    | SW3/switch 7 |   on    |
   |   | Mode) disabled                |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Support for 7 drives (DOS 5.0 | SW3/switch 8 |   off   |
   |   | and later) enabled            |              |         |
   |---+-------------------------------+--------------+---------|
   |   | Support for 7 drives (DOS 5.0 | SW3/switch 8 |   on    |
   |   | and later) disabled           |              |         |
   |---+-------------------------------+--------------+---------|
   |>> | Floppy drive enabled          | SW5/switch 1 |   on    |
   |---+-------------------------------+--------------+---------|
   |   | Floppy drive disabled         | SW5/switch 1 |   off   |
   |---+-------------------------------+--------------+---------|
   |>> | Normal operation enabled      | SW5/switch 2 |   off   |
   |---+-------------------------------+--------------+---------|
   |   | Diagnostic mode enabled       | SW5/switch 2 |   on    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SCSI HOST ADAPTER SLOT NUMBER                |
   |------------------------------------------------------------|
   | Slot Number  | SW1/switch 1  | SW1/switch 2 | SW1/switch 3 |
   |--------------+---------------+--------------+--------------|
   |>>    |   1   |      off      |     off      |     off      |
   |------+-------+---------------+--------------+--------------|
   |      |   2   |      on       |     off      |     off      |
   |------+-------+---------------+--------------+--------------|
   |      |   3   |      off      |      on      |     off      |
   |------+-------+---------------+--------------+--------------|
   |      |   4   |      on       |      on      |     off      |
   |------+-------+---------------+--------------+--------------|
   |      |   5   |      off      |     off      |      on      |
   |------+-------+---------------+--------------+--------------|
   |      |   6   |      on       |     off      |      on      |
   |------+-------+---------------+--------------+--------------|
   |      |   7   |      off      |      on      |      on      |
   |------+-------+---------------+--------------+--------------|
   |      |   8   |      on       |      on      |      on      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              MOTHERBOARD SPEED CONFIGURATION               |
   |------------------------------------------------------------|
   |        Speed         |   SW1/switch 4   |   SW1/switch 5   |
   |----------------------+------------------+------------------|
   |   |   20 or 25MHz    |       off        |       off        |
   |---+------------------+------------------+------------------|
   |>> |   33 or 40MHz    |        on        |       off        |
   |---+------------------+------------------+------------------|
   |   |      50MHz       |       off        |        on        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      I/O PORT ADDRESS                      |
   |------------------------------------------------------------|
   |    Address    | SW3/switch 1 | SW3/switch 2 | SW3/switch 3 |
   |---------------+--------------+--------------+--------------|
   |   | 130-133h  |      on      |     off      |     off      |
   |---+-----------+--------------+--------------+--------------|
   |   | 134-137h  |      on      |     off      |      on      |
   |---+-----------+--------------+--------------+--------------|
   |   | 230-233h  |     off      |      on      |     off      |
   |---+-----------+--------------+--------------+--------------|
   |   | 234-237h  |     off      |      on      |      on      |
   |---+-----------+--------------+--------------+--------------|
   |>> | 330-333h  |     off      |     off      |     off      |
   |---+-----------+--------------+--------------+--------------|
   |   | 334-337h  |     off      |     off      |      on      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DMA CHANNEL CONFIGURATION                  |
   |------------------------------------------------------------|
   |       DMA Channel       |  SW4/switch 1   |  SW4/switch 2  |
   |-------------------------+-----------------+----------------|
   |>> |          5          |       off       |      off       |
   |---+---------------------+-----------------+----------------|
   |   |          6          |       on        |      off       |
   |---+---------------------+-----------------+----------------|
   |   |          7          |       off       |       on       |
   |---+---------------------+-----------------+----------------|
   |   | No Channel selected |       on        |       on       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              INRTERRUPT REQUEST CONFIGURATION              |
   |------------------------------------------------------------|
   |    IRQ     | SW4/switch 3  | SW4/switch 4  | SW4/switch 5  |
   |------------+---------------+---------------+---------------|
   |   |   9    |      on       |      off      |      off      |
   |---+--------+---------------+---------------+---------------|
   |   |   10   |      off      |      on       |      off      |
   |---+--------+---------------+---------------+---------------|
   |>> |   11   |      off      |      off      |      off      |
   |---+--------+---------------+---------------+---------------|
   |   |   12   |      on       |      on       |      off      |
   |---+--------+---------------+---------------+---------------|
   |   |   14   |      off      |      off      |      on       |
   |---+--------+---------------+---------------+---------------|
   |   |   15   |      on       |      off      |      on       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        BIOS ADDRESS                        |
   |------------------------------------------------------------|
   |    Address    | SW4/switch 6 | SW4/switch 7 | SW4/switch 8 |
   |---------------+--------------+--------------+--------------|
   |>> |  C8000h   |     off      |     off      |     off      |
   |---+-----------+--------------+--------------+--------------|
   |   |  D8000h   |      on      |     off      |     off      |
   |---+-----------+--------------+--------------+--------------|
   |   |  D4000h   |     off      |      on      |     off      |
   |---+-----------+--------------+--------------+--------------|
   |   |  D0000h   |      on      |      on      |     off      |
   |---+-----------+--------------+--------------+--------------|
   |   |  CC000h   |     off      |     off      |      on      |
   |---+-----------+--------------+--------------+--------------|
   |   |  DC000h   |      on      |     off      |      on      |
   |---+-----------+--------------+--------------+--------------|
   |   | Disabled  |     off      |      on      |      on      |
   |---+-----------+--------------+--------------+--------------|
   |   | Disabled  |      on      |      on      |      on      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |  J5 is factory configured in the closed position - do not  |
   |                           alter                            |
   +------------------------------------------------------------+