SYNAPSE COMMUNICATIONS
======================

   SDLC ADAPTER

   Card Type           Digital I/O card                           
   I/O Options         Serial port                                
   Data Bus            8-bit ISA                                  
   Card Size           Half-length                                

<gopher://bitreich.org/I/th99/i/S-T/55400-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |           Function            |           Label            |
   |-------------------------------+----------------------------|
   | RS-232 connector              |            CN1             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |               Function                | Label |  Position  |
   |---------------------------------------+-------+------------|
   |>> | Factory configured - do not alter |  JP2  | Pins 1 & 2 |
   |   |                                   |       |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 BASE I/O ADDRESS SELECTION                 |
   |------------------------------------------------------------|
   |Setting|SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6|SW1/7|SW1/8|
   |-------+------+------+------+------+------+-----+-----+-----|
   | 210h  | Off  |  On  |  On  |  On  |  On  | Off | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 218h  | Off  |  On  |  On  |  On  |  On  | Off | Off | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 220h  | Off  |  On  |  On  |  On  | Off  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 228h  | Off  |  On  |  On  |  On  | Off  | On  | Off | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 230h  | Off  |  On  |  On  |  On  | Off  | Off | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 3A8h  | Off  | Off  | Off  |  On  | Off  | On  | Off | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 3C0h  | Off  | Off  | Off  | Off  |  On  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 3C8h  | Off  | Off  | Off  | Off  |  On  | On  | Off | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 3E0h  | Off  | Off  | Off  | Off  | Off  | On  | On  | On  |
   |-------+------+------+------+------+------+-----+-----+-----|
   | 3E8h  | Off  | Off  | Off  | Off  | Off  | On  | Off | On  |
   |------------------------------------------------------------|
   |                           Note:                            |
   |                                                            |
   |A total of 255 base address settings are available. The     |
   |switches are a binary representation of the decimal memory  |
   |addresses. SW1/8 is the Most Significant Bit and switch     |
   |SW1/1 is the Least Significant Bit. The switches have the   |
   |following decimal values: SW1/8=32768, SW1/7=16384,         |
   |SW1/6=8192, SW1/5=4096, SW1/4=2048, SW1/3=1024, SW1/2=512,  |
   |SW1/1=256. Turn off the switches and add the values of the  |
   |switches to obtain the correct memory address. (Off=1, On=0)|
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    INTERRUPT SELECTION                     |
   |------------------------------------------------------------|
   |              IRQ               |            JP1            |
   |--------------------------------+---------------------------|
   |   |             2              |   Pins 1 & 2 are closed   |
   |---+----------------------------+---------------------------|
   |>> |             3              |   Pins 3 & 4 are closed   |
   |---+----------------------------+---------------------------|
   |   |             4              |   Pins 5 & 6 are closed   |
   |---+----------------------------+---------------------------|
   |   |             5              |   Pins 7 & 8 are closed   |
   |---+----------------------------+---------------------------|
   |   |             7              |  Pins 9 & 10 are closed   |
   +------------------------------------------------------------+