(TXT) View Source
       
       # SIIG, INC.
       
          TWINCOM A.2
       
          Card Type          Serial interface                            
          Chipset Controller Unidentified                                
          I/O Options        Serial ports (2)                            
          Maximum Dram       N/A                                         
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |      Purpose      | Location |     Purpose      | Location |
          |-------------------+----------+------------------+----------|
          | Serial port 1     |    J1    | Serial port 2    |    J2    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    PORT 1 CONFIGURATION                    |
          |------------------------------------------------------------|
          |            Port            |              jP3              |
          |----------------------------+-------------------------------|
          |            COM1            |       Pins 5 & 9 closed       |
          |----------------------------+-------------------------------|
          |            COM2            |      Pins 6 & 10 closed       |
          |----------------------------+-------------------------------|
          |            COM3            |      Pins 7 & 11 closed       |
          |----------------------------+-------------------------------|
          |            COM4            |      Pins 8 & 12 closed       |
          |----------------------------+-------------------------------|
          |          Disabled          |             Open              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               PORT 1 INTERRUPT CONFIGURATION               |
          |------------------------------------------------------------|
          |            IRQ             |              jP4              |
          |----------------------------+-------------------------------|
          |             2              |       Pins 1 & 5 closed       |
          |----------------------------+-------------------------------|
          |             3              |       Pins 2 & 6 closed       |
          |----------------------------+-------------------------------|
          |             4              |       Pins 5 & 9 closed       |
          |----------------------------+-------------------------------|
          |             5              |      Pins 6 & 10 closed       |
          |----------------------------+-------------------------------|
          |          Disabled          |             Open              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                    PORT 2 CONFIGURATION                    |
          |------------------------------------------------------------|
          |            Port            |              jP3              |
          |----------------------------+-------------------------------|
          |            COM1            |       Pins 1 & 5 closed       |
          |----------------------------+-------------------------------|
          |            COM2            |       Pins 2 & 6 closed       |
          |----------------------------+-------------------------------|
          |            COM3            |       Pins 3 & 7 closed       |
          |----------------------------+-------------------------------|
          |            COM4            |       Pins 4 & 8closed        |
          |----------------------------+-------------------------------|
          |          Disabled          |             Open              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               PORT 2 INTERRUPT CONFIGURATION               |
          |------------------------------------------------------------|
          |            IRQ             |              jP4              |
          |----------------------------+-------------------------------|
          |             2              |       Pins 3 & 7 closed       |
          |----------------------------+-------------------------------|
          |             3              |       Pins 4 & 8 closed       |
          |----------------------------+-------------------------------|
          |             4              |      Pins 7 & 11 closed       |
          |----------------------------+-------------------------------|
          |             5              |      Pins 8 & 12 closed       |
          |----------------------------+-------------------------------|
          |          Disabled          |             Open              |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |               SECOND SERIAL PORT ACTIVATION                |
          |------------------------------------------------------------|
          | To activate the second serial port, the following chips    |
          | must be installed:                                         |
          |------------------------------------------------------------|
          |               Chip               |         Socket          |
          |----------------------------------+-------------------------|
          |            16450 ASIC            |           U1            |
          |----------------------------------+-------------------------|
          |               1488               |           U2            |
          |----------------------------------+-------------------------|
          |               1489               |           U3            |
          +------------------------------------------------------------+