EPSON, INC.
===========

   NEW SERIAL INTERFACE #8143

   Card Type          Serial interface card                       
   Chipset/Controller Unidentified                                
   I/O Options        Serial interface                            
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/E-H/50299-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |            Purpose            |          Location          |
   |-------------------------------+----------------------------|
   | Serial Interface              |            CN1             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   HANDSHAKING PROTOCOL                     |
   |------------------------------------------------------------|
   |        Function         |  J1  |  J2  |  J3  |  J4  |  J5  |
   |-------------------------+------+------+------+------+------|
   |  Pull up "TTY-TXD" to   |  On  | Off  | Off  | Off  | Off  |
   |     +12V via 470 W      |      |      |      |      |      |
   |-------------------------+------+------+------+------+------|
   |   Connect : "TTY-TXD    | Off  |  On  | Off  |  On  | Off  |
   |    Return" to Signal    |      |      |      |      |      |
   |         Ground          |      |      |      |      |      |
   |-------------------------+------+------+------+------+------|
   |  Pull up "TTY-RCD" to   | Off  | Off  |  On  | Off  | Off  |
   |     +12V via 470 W      |      |      |      |      |      |
   |-------------------------+------+------+------+------+------|
   | Pull up "DSR" and "DCD" | Off  | Off  | Off  | Off  |  On  |
   |   to +12V via 4.7k W    |      |      |      |      |      |
   |------------------------------------------------------------|
   | Note:The factory default setting for J1, J2, J3, and J4 is |
   | Off. The factory default setting for J5 is on.             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       DTR PROTOCOL                         |
   |------------------------------------------------------------|
   |                Signal                |   JNOR   |   JREV   |
   |--------------------------------------+----------+----------|
   |>>     | DTR=MARK (RS232), TTY-TTD =  |    On    |   Off    |
   |       |     MARK (current loop)      |          |          |
   |-------+------------------------------+----------+----------|
   |       | DTR=SPACE (RS232), TTY-TXD = |   Off    |    On    |
   |       |     SPACE (current loop)     |          |          |
   |------------------------------------------------------------|
   | Note:MARK = logic "1" (-3 to -27V), SPACE = logic "0" (+3  |
   | to +27V) for RS232C For Current loop, MARK = logic "1"     |
   | (current on), SPACE = logic "0" (current Off).             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 INPUT DATA CONFIGURATION                   |
   |------------------------------------------------------------|
   |          Data          |       JC        |       JRS       |
   |------------------------+-----------------+-----------------|
   |>> |    RS232 level     |       Off       |       On        |
   |---+--------------------+-----------------+-----------------|
   |   | Current loop level |       On        |       Off       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 OUTPUT DATA CONFIGURATION                  |
   |------------------------------------------------------------|
   |                     Output                     | JF  | JX  |
   |------------------------------------------------+-----+-----|
   |>> |  Reverse channel flag to TTY-TXD (current  | Off | On  |
   |   |                   loop)                    |     |     |
   |---+--------------------------------------------+-----+-----|
   |   |   X-On/X-Off signal to TTY-TXD (current    | On  | Off |
   |   |                   loop)                    |     |     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    DATA BIT SELECTION                      |
   |------------------------------------------------------------|
   |            Data Bit            |           SW1/2           |
   |--------------------------------+---------------------------|
   |>>    |            7            |            On             |
   |------+-------------------------+---------------------------|
   |      |            8            |            Off            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   PARITY CONFIGURATION                     |
   |------------------------------------------------------------|
   |      Setting      | Parity check  |   SW1/5    |   SW1/6   |
   |-------------------+---------------+------------+-----------|
   |>> |    Enabled    |     Even      |     On     |    On     |
   |---+---------------+---------------+------------+-----------|
   |   |   Disabled    |      Odd      |    Off     |    Off    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    INTERFACE SELECTION                     |
   |------------------------------------------------------------|
   |             Interface             |         SW1/8          |
   |-----------------------------------+------------------------|
   |>> |   Serial interface is valid   |           On           |
   |---+-------------------------------+------------------------|
   |   |  Parallel interface is valid  |          Off           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    BIT RATE SELECTION                      |
   |------------------------------------------------------------|
   |  Bit rate  |   SW1/1   |   SW1/3   |   SW1/4   |   SW1/7   |
   |------------+-----------+-----------+-----------+-----------|
   |     75     |    On     |    On     |    On     |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |    110     |    On     |    Off    |    On     |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |   134.5    |    On     |    On     |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |    150     |    On     |    Off    |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |    200     |    Off    |    On     |    On     |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |    300     |    Off    |    Off    |    On     |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |    600     |    Off    |    On     |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |    1200    |    Off    |    Off    |    Off    |    On     |
   |------------+-----------+-----------+-----------+-----------|
   |    1800    |    On     |    On     |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |    2400    |    On     |    Off    |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |    4800    |    On     |    On     |    Off    |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |    9600    |    On     |    Off    |    Off    |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   19200    |    Off    |    On     |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   19200    |    Off    |    Off    |    On     |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   19200    |    Off    |    On     |    Off    |    Off    |
   |------------+-----------+-----------+-----------+-----------|
   |   19200    |    Off    |    Off    |    Off    |    Off    |
   +------------------------------------------------------------+