DIAMOND FLOWER, INC.
====================

   MS-422 PLUS

   Card Type          Multi I/O                                   
   Chipset/Controller NS16550AN                                   
   I/O Options        Serial ports (2)                            
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/C-D/50311-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |    Purpose    |   Location   |    Purpose    |  Location   |
   |---------------+--------------+---------------+-------------|
   | Serial port 1 |      J2      | Serial port 2 |     J1      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |    Port 1(J2)    |  Port 2 (J1)  |   SW2/1    |   SW2/2    |
   |------------------+---------------+------------+------------|
   |>>  |    COM1     |     COM2      |    Off     |    Off     |
   |----+-------------+---------------+------------+------------|
   |    |    COM1     |   Disabled    |     On     |    Off     |
   |----+-------------+---------------+------------+------------|
   |    |    COM2     |     COM3      |    Off     |     On     |
   |----+-------------+---------------+------------+------------|
   |    |    COM3     |     COM4      |     On     |     On     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT INTERRUPT SELECT                |
   |------------------------------------------------------------|
   |  Port 1(J2)  | Port 2 (J1) | SW2/3 | SW2/4 | SW2/5 | SW2/6 |
   |--------------+-------------+-------+-------+-------+-------|
   |>> |   IRQ4   |    IRQ3     |  On   |  Off  |  Off  |  On   |
   |---+----------+-------------+-------+-------+-------+-------|
   |   |   IRQ3   |    IRQ4     |  Off  |  On   |  On   |  Off  |
   |---+----------+-------------+-------+-------+-------+-------|
   |   | Disabled |  Disabled   |  Off  |  Off  |  Off  |  Off  |
   +------------------------------------------------------------+

+-----------------------------------------------------------------------+
|                              DMA SELECT                               |
|-----------------------------------------------------------------------|
|Port 1 (J1)|Port 2 (J2)|SW1/1|SW1/2|SW1/3|SW1/4|SW1/5|SW1/6|SW1/7|SW1/8|
|-----------+-----------+-----+-----+-----+-----+-----+-----+-----+-----|
| Receiver  | Receiver  | On  | On  | Off | Off | On  | On  | Off | Off |
|-----------+-----------+-----+-----+-----+-----+-----+-----+-----+-----|
|Transmitter|Transmitter| Off | Off | On  | On  | Off | Off | On  | On  |
+-----------------------------------------------------------------------+

   +------------------------------------------------------------+
   |             DMA PORT AND CHANNEL CONFIGURATION             |
   |------------------------------------------------------------|
   |   Port 1   |  Port 2   |  JP1   |  JP2   |  JP11  |  JP12  |
   |    (J1)    |   (J2)    |        |        |        |        |
   |------------+-----------+--------+--------+--------+--------|
   |   DMA 1    |   DMA 3   | Closed | Closed |  Open  |  Open  |
   |------------+-----------+--------+--------+--------+--------|
   |   DMA 3    |    N/A    |  Open  | Closed | Closed | Closed |
   |------------+-----------+--------+--------+--------+--------|
   |   DMA 1    |    N/A    | Closed |  Open  |  Open  |  Open  |
   |------------+-----------+--------+--------+--------+--------|
   |    N/A     |   DMA 1   | Closed |  Open  | Closed | Closed |
   |------------+-----------+--------+--------+--------+--------|
   |    N/A     |   DMA 3   |  Open  | Closed |  Open  |  Open  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               RS-422/RS-232 INTERFACE SELECT               |
   |------------------------------------------------------------|
   | Port 1 (J1) | Port 2 (J2) |      JP8/A-J      |  JP9/A-J   |
   |-------------+-------------+-------------------+------------|
   |>>  | RS-422 |   RS-422    | Pins 1 & 2 closed | Pins 1 & 2 |
   |    |        |             |                   |   closed   |
   |----+--------+-------------+-------------------+------------|
   |    | RS-422 |   RS-232    | Pins 1 & 2 closed | Pins 2 & 3 |
   |    |        |             |                   |   closed   |
   |----+--------+-------------+-------------------+------------|
   |    | RS-232 |   RS-422    | Pins 2 & 3 closed | Pins 1 & 2 |
   |    |        |             |                   |   closed   |
   |----+--------+-------------+-------------------+------------|
   |    | RS-232 |   RS-232    | Pins 2 & 3 closed | Pins 2 & 3 |
   |    |        |             |                   |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    RS-422 DRIVER SELECT                    |
   |------------------------------------------------------------|
   |    Port 1 (J1)    |  Port 2 (J2)  |    JP5     |    JP3    |
   |-------------------+---------------+------------+-----------|
   |>> |   Always on   |   Always on   |    Open    |   Open    |
   |---+---------------+---------------+------------+-----------|
   |   |  Always Off   |  Always Off   | Pins 2 & 3 | Pins 2 &  |
   |   |               |               |   closed   | 3 closed  |
   |---+---------------+---------------+------------+-----------|
   |   | Controlled by | Controlled by | Pins 1 & 2 | Pins 1 &  |
   |   |      RTS      |      RTS      |   closed   | 2 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              RS-232/RS-422 NORMAL SET SELECT               |
   |------------------------------------------------------------|
   | Port 1 (J1) | Port 2 (J2) |      JP6       |      JP4      |
   |-------------+-------------+----------------+---------------|
   |>>  | RS-422 |   RS--422   | Pins 2 & 3, 4  | Pins 2 & 3, 4 |
   |    |        |             |   & 5 closed   |  & 5 closed   |
   |----+--------+-------------+----------------+---------------|
   |    | RS-422 |   RS-232    | Pins 2 & 3, 4  | Pins 1 & 2, 5 |
   |    |        |             |   & 5 closed   |  & 6 closed   |
   |----+--------+-------------+----------------+---------------|
   |    | RS-232 |   RS-422    | Pins 1 & 2, 5  | Pins 2 & 3, 4 |
   |    |        |             |   & 6 closed   |  & 5 closed   |
   |----+--------+-------------+----------------+---------------|
   |    | RS-232 |   RS-232    | Pins 1 & 2, 5  | Pins 1 & 2, 5 |
   |    |        |             |   & 6 closed   |  & 6 closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CLOCK SPEED SELECT                     |
   |------------------------------------------------------------|
   |           Speed            |              JP7              |
   |----------------------------+-------------------------------|
   |>> |       1.8432MHz        |       Pins 1 & 2 closed       |
   |---+------------------------+-------------------------------|
   |   |        8.00MHz         |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SIGNAL GROUND CONFIGURATION                 |
   |------------------------------------------------------------|
   |              Setting              |          JP10          |
   |-----------------------------------+------------------------|
   |>>   |          Connected          |         Closed         |
   |-----+-----------------------------+------------------------|
   |     |          Isolated           |          Open          |
   +------------------------------------------------------------+