QUATECH, INC.
=============

   SCB-1040, SCB-1050

   Card Type          Serial controller                           
   Chipset/Controller NEC                                         
   I/O Options        Serial port                                 
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/P-R/50611-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |            Purpose            |          Location          |
   |-------------------------------+----------------------------|
   | Serial port - DB-25           |            CN1             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   INTERRUPT SELECT - J1                    |
   |------------------------------------------------------------|
   |Setting|Jumper A|Jumper B|Jumper C|Jumper D|Jumper E|Jumper |
   |       |        |        |        |        |        |   F   |
   |-------+--------+--------+--------+--------+--------+-------|
   |>> |IRQ4|  open  |  open  | closed |  open  |  open  | open  |
   |--+----+--------+--------+--------+--------+--------+-------|
   |  |IRQ2| closed |  open  |  open  |  open  |  open  | open  |
   |--+----+--------+--------+--------+--------+--------+-------|
   |  |IRQ3|  open  | closed |  open  |  open  |  open  | open  |
   |--+----+--------+--------+--------+--------+--------+-------|
   |  |IRQ5|  open  |  open  |  open  | closed |  open  | open  |
   |--+----+--------+--------+--------+--------+--------+-------|
   |  |IRQ6|  open  |  open  |  open  |  open  | closed | open  |
   |--+----+--------+--------+--------+--------+--------+-------|
   |  |IRQ7|  open  |  open  |  open  |  open  |  open  |closed |
   +------------------------------------------------------------+

+------------------------------------------------------------------+
|                         DMA SELECT - J2                          |
|------------------------------------------------------------------|
|   DMA    |  A   |  B   |  C   |  D   |  E   |  F   |  G   |  H   |
|----------+------+------+------+------+------+------+------+------|
|>>|CH 1 for|closed| open |closed| open | open | open | open | open |
| |transmit|      |      |      |      |      |      |      |      |
|-+--------+------+------+------+------+------+------+------+------|
|>>|CH 3 for| open | open | open | open | open |closed| open |closed|
| |receive |      |      |      |      |      |      |      |      |
|-+--------+------+------+------+------+------+------+------+------|
| |CH3 for | open |closed| open | open | open |closed| open |closed|
| |transmit|      |      |      |      |      |      |      |      |
|-+--------+------+------+------+------+------+------+------+------|
| |CH1 for |closed| open | open | open | open | open |closed| open |
| |receive |      |      |      |      |      |      |      |      |
|-+--------+------+------+------+------+------+------+------+------|
| |CH1 for |closed| open | open | open |closed| open | open | open |
| |transmit|      |      |      |      |      |      |      |      |
| |  and   |      |      |      |      |      |      |      |      |
| |receive |      |      |      |      |      |      |      |      |
|-+--------+------+------+------+------+------+------+------+------|
| |CH3 for | open | open | open |closed| open | open | open |closed|
| |transmit|      |      |      |      |      |      |      |      |
| |  and   |      |      |      |      |      |      |      |      |
| |receive |      |      |      |      |      |      |      |      |
+------------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       INTERRUPT MODE                       |
   |------------------------------------------------------------|
   |                Setting                |         J3         |
   |---------------------------------------+--------------------|
   |>> |         Use dedicated IRQ         | pins 1 & 4 closed  |
   |---+-----------------------------------+--------------------|
   |   | Share IRQ with compatible Quatech | pins 2 & 5, 3 & 6  |
   |   |               card                |       closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    RECEIVE CLOCK SOURCE                    |
   |------------------------------------------------------------|
   |           Source           |              J4               |
   |----------------------------+-------------------------------|
   |>> |        Internal        |       pins 2 & 3 closed       |
   |---+------------------------+-------------------------------|
   |   |        External        |       pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   TRANSMIT CLOCK SOURCE                    |
   |------------------------------------------------------------|
   |           Source           |              J5               |
   |----------------------------+-------------------------------|
   |>> |        Internal        |       pins 2 & 3 closed       |
   |---+------------------------+-------------------------------|
   |   |        External        |       pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      -SYNC/IPS SELECT                      |
   |------------------------------------------------------------|
   |                 Source                 |        J6         |
   |----------------------------------------+-------------------|
   |>> | Intenal synchronization mode sync  | pins 2 & 3 closed |
   |   |    notification signal enabled     |                   |
   |---+------------------------------------+-------------------|
   |   |  External synchronization mode -   | pins 1 & 2 closed |
   |   |  sync notification signal enabled  |                   |
   |---+------------------------------------+-------------------|
   |   |    Asynchronous mode - general     | pins 1 & 2 closed |
   |   |       purpose signal enabled       |                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   INTERRUPT SOURCE - J7                    |
   |------------------------------------------------------------|
   |              Setting               | Jumper A  | Jumper B  |
   |------------------------------------+-----------+-----------|
   |>> | From communications controller |  closed   |   open    |
   |---+--------------------------------+-----------+-----------|
   |   |    From DMA terminal count     |   open    |  closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        RTS/CTS MODE                        |
   |------------------------------------------------------------|
   |            Setting             |            J8             |
   |--------------------------------+---------------------------|
   |>> |  RTS/CTS connected to CN1  | pins 1 & 4, 2 & 5 closed  |
   |---+----------------------------+---------------------------|
   |   |  RTS/CTS loopback enabled  | pins 1 & 2, 4 & 5 closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  HALF/FULL-DUPLEX SELECT                   |
   |------------------------------------------------------------|
   |           Setting           |              J8              |
   |-----------------------------+------------------------------|
   |>> |       Half-duplex       |      pins 3 & 6 closed       |
   |---+-------------------------+------------------------------|
   |   |       Full duplex       |       pins 3 & 6 open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               RECEIVE CLOCK BUFFER SELECTION               |
   |------------------------------------------------------------|
   |      External Clock      |               J9                |
   |--------------------------+---------------------------------|
   |>> |   EIA-422/EIA-485    | pins 1 & 5, 2 & 3, 7 & 8 closed |
   |---+----------------------+---------------------------------|
   |   |         TTL          |    pins 1 & 2, 4 & 8 closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              TRANSMIT CLOCK BUFFER SELECTION               |
   |------------------------------------------------------------|
   |      External Clock      |               J10               |
   |--------------------------+---------------------------------|
   |>> |   EIA-422/EIA-485    | pins 1 & 5, 2 & 3, 7 & 8 closed |
   |---+----------------------+---------------------------------|
   |   |         TTL          |    pins 1 & 2, 4 & 8 closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          SYNCHRONOUS BLOCK TRANSFER COMPATIBILITY          |
   |------------------------------------------------------------|
   |                Setting                |        J11         |
   |---------------------------------------+--------------------|
   |>>  |     Block Transfer software      | pins 1 & 2 closed  |
   |    |            compatible            |                    |
   |----+----------------------------------+--------------------|
   |    |     Quatech REV A compatible     | pins 2 & 3 closed  |
   |------------------------------------------------------------|
   | Note:The location of jumper J11 is not specified in        |
   | manufacturer's documentation.                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 I/O ADDRESS CONFIGURATION                 ||
   |-----------------------------------------------------------||
   |      Base Address      |               SW1                ||
   |------------------------+----------------------------------||
   |>> |        210h        |        2, 3, 4, 5 & 7 on         ||
   |---+--------------------+----------------------------------||
   |   |        0F0h        |           1, 2 & 7 on            ||
   |---+--------------------------------------------------------|
   |   |   Note (1): The address range for the SCB-1040/1050 is |
   |   |   from 0 to 3F8h. The switches are a binary            |
   |   |   representation of the addresses. When a switch is    |
   |   |   off, the corresponding bit is set to 1 and has the   |
   |   |   following decimal value: SW1/1=2, SW1/2=1, SW1/3=8,  |
   |   |   SW1/4=4, SW1/5=2, SW1/6=1, SW1/7=8. SW1/8 is not     |
   |   |   used and the factory setting should not be altered.  |
   |   |   The SCB-1040/1050 requires 8 consecutive address     |
   |   |   locations.                                           |
   +------------------------------------------------------------+