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

   RS-232C ADAPTER

   Card Type              Serial card                             
   Chip Set               Unidentified                            
   Maximum Onboard Memory Unidentified                            
   I/O Options            Serial ports (2)                        
   Data Bus               8-bit ISA                               

<gopher://bitreich.org/I/th99/i/U-Z/54497-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |      Function       | Label  |      Function      | Label  |
   |---------------------+--------+--------------------+--------|
   | Serial port 1       |  CN1   | Serial port 2      |  CN2   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 1 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |      Setting       |       S1/1        |       S1/3        |
   |--------------------+-------------------+-------------------|
   |        3E8h        |        Off        |        On         |
   |--------------------+-------------------+-------------------|
   |        3F8h        |        On         |        Off        |
   |--------------------+-------------------+-------------------|
   |      Disabled      |        Off        |        Off        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT 2 ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |        Setting         |      S1/2       |      S1/4       |
   |------------------------+-----------------+-----------------|
   |          2E8h          |       Off       |       On        |
   |------------------------+-----------------+-----------------|
   |          2F8h          |       On        |       Off       |
   |------------------------+-----------------+-----------------|
   |        Disabled        |       Off       |       Off       |
   |------------------------------------------------------------|
   | Technical note: Must install an INS 8250 chip in slot IC4  |
   | to enable dual serial port capabilities. Or - 1488 into    |
   | IC2 and 1489 into to U9.                                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 1 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |        IRQ         |        S1/5        |       S1/6       |
   |--------------------+--------------------+------------------|
   |        IRQ3        |        Off         |        On        |
   |--------------------+--------------------+------------------|
   |        IRQ4        |         On         |       Off        |
   |--------------------+--------------------+------------------|
   |      Disabled      |        Off         |       Off        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             SERIAL PORT 2 INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |        IRQ         |       S1/7        |       S1/8        |
   |--------------------+-------------------+-------------------|
   |        IRQ3        |        Off        |        On         |
   |--------------------+-------------------+-------------------|
   |        IRQ4        |        On         |        Of         |
   |--------------------+-------------------+-------------------|
   |      Disable       |        Off        |        Off        |
   +------------------------------------------------------------+