UNIDENTIFIED
============

   RTX-05D

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

<gopher://bitreich.org/I/th99/i/U-Z/50698-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Purpose       | Location |     Purpose     | Location |
   |--------------------+----------+-----------------+----------|
   | Serial port 1 -    |   CN1    | Serial port 2 - |   CN2    |
   | external           |          | internal        |          |
   |------------------------------------------------------------|
   | Note:The location of CN2 is not specified in               |
   | manufacturer's documentation.                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 1 CONFIGURATION                 |
   |------------------------------------------------------------|
   |      COM/Address       |       JP1       |       JP3       |
   |------------------------+-----------------+-----------------|
   |>> |     COM1/3F8h      |     Closed      |      Open       |
   |---+--------------------+-----------------+-----------------|
   |   |     COM3/3E8h      |      Open       |     Closed      |
   |---+--------------------+-----------------+-----------------|
   |   |      Disabled      |      Open       |      Open       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                SERIAL PORT 2 CONFIGURATION                 |
   |------------------------------------------------------------|
   |      COM/Address       |       JP2       |       JP4       |
   |------------------------+-----------------+-----------------|
   |>> |     COM2/2F8h      |     Closed      |      Open       |
   |---+--------------------+-----------------+-----------------|
   |   |     COM4/2E8h      |      Open       |     Closed      |
   |---+--------------------+-----------------+-----------------|
   |   |      Disabled      |      Open       |      Open       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SERIAL PORT 1 INTERRUPT SELECT               |
   |------------------------------------------------------------|
   |          IRQ           |       JP5       |       JP6       |
   |------------------------+-----------------+-----------------|
   |>> |        IRQ3        |      Open       |     Closed      |
   |---+--------------------+-----------------+-----------------|
   |   |        IRQ4        |     Closed      |      Open       |
   |---+--------------------+-----------------+-----------------|
   |   |      Disabled      |      Open       |      Open       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SERIAL PORT 2 INTERRUPT SELECT               |
   |------------------------------------------------------------|
   |         IRQ         |        JP7        |       JP8        |
   |---------------------+-------------------+------------------|
   |        IRQ4         |      Closed       |       Open       |
   |---------------------+-------------------+------------------|
   |        IRQ3         |       Open        |      Closed      |
   |---------------------+-------------------+------------------|
   |      Disabled       |       Open        |       Open       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |   Serial ports 1 & 2 must have different IRQs selected.    |
   +------------------------------------------------------------+