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

   MS-422

   Card Type          Multi I/O card                              
   Chipset/Controller UMC82450                                    
   I/O Options        Serial ports (2)                            
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/C-D/50305-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |   Purpose   | Location |        Purpose         | Location |
   |-------------+----------+------------------------+----------|
   | Serial port |   CN1    | Protective/ground      |   JP9    |
   | 1           |          | connector              |          |
   |-------------+----------+------------------------+----------|
   | Serial port |   CN2    |                        |          |
   | 2           |          |                        |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SERIAL PORT CONFIGURATION                  |
   |------------------------------------------------------------|
   |   Port 1 (CN1)    | Port 2 (CN2)  |   SW1/1    |   SW1/2   |
   |-------------------+---------------+------------+-----------|
   |>>   |    COM1     |     COM2      |    Off     |    Off    |
   |-----+-------------+---------------+------------+-----------|
   |     |    COM1     |   Disabled    |     On     |    Off    |
   |-----+-------------+---------------+------------+-----------|
   |     |    COM2     |     COM3      |    Off     |    On     |
   |-----+-------------+---------------+------------+-----------|
   |     |    COM3     |     COM4      |     On     |    On     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT INTERRUPT SELECT                |
   |------------------------------------------------------------|
   | Port 1 (CN1) |   Port 2    | SW1/3 | SW1/4 | SW1/5 | SW1/6 |
   |              |    (CN2)    |       |       |       |       |
   |--------------+-------------+-------+-------+-------+-------|
   |>> |   IRQ4   |    IRQ3     |  On   |  Off  |  Off  |  On   |
   |---+----------+-------------+-------+-------+-------+-------|
   |   |   IRQ3   |    IRQ4     |  Off  |  On   |  On   |  Off  |
   |---+----------+-------------+-------+-------+-------+-------|
   |   | Disabled |  Disabled   |  Off  |  Off  |  Off  |  Off  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    RS-422 DRIVER SELECT                    |
   |------------------------------------------------------------|
   |   Port 1 (CN1)   | Port 2 (CN2)  |    JP1     |    JP2     |
   |------------------+---------------+------------+------------|
   |  Controlled by   | Controlled by | Pins 1 & 2 | Pins 1 & 2 |
   |       RTS        |      RTS      |   closed   |   closed   |
   |------------------+---------------+------------+------------|
   |    Always on     |   Always on   |    Open    |    Open    |
   |------------------+---------------+------------+------------|
   |    Always Off    |  Always Off   | Pins 2 & 3 | Pins 2 & 3 |
   |                  |               |   closed   |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     RS-422/232 SELECT                      |
   |------------------------------------------------------------|
   | Port 1 (CN1) | Port 2 (CN2) |       JP4       |    JP3     |
   |--------------+--------------+-----------------+------------|
   |    RS-422    |    RS-422    |   Pins 1 & 2    | Pins 1 & 2 |
   |              |              |     closed      |   closed   |
   |--------------+--------------+-----------------+------------|
   |    RS-422    |    RS-232    |   Pins 1 & 2    | Pins 2 & 3 |
   |              |              |     closed      |   closed   |
   |--------------+--------------+-----------------+------------|
   |    RS-232    |    RS-422    |   Pins 2 & 3    | Pins 1 & 2 |
   |              |              |     closed      |   closed   |
   |--------------+--------------+-----------------+------------|
   |    RS-232    |    RS-232    |   Pins 2 & 3    | Pins 2 & 3 |
   |              |              |     closed      |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    PORT DIAGNOSTIC MODE                    |
   |------------------------------------------------------------|
   |   Port 1 (CN1)    | Port 2 (CN2)  |    JP7     |    JP8    |
   |-------------------+---------------+------------+-----------|
   |>> |    Normal     |    Normal     | Pins 1 & 2 | Pins 1 &  |
   |   |   operation   |   operation   |   closed   | 2 closed  |
   |---+---------------+---------------+------------+-----------|
   |   |      IBM      |      IBM      | Pins 2 & 3 | Pins 2 &  |
   |   |  diagnostic   |  diagnostic   |   closed   | 3 closed  |
   |   |     test      |     test      |            |           |
   +------------------------------------------------------------+