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

   SCB-1020

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

<gopher://bitreich.org/I/th99/i/P-R/50610-1.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       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       CHASSIS GROUND                       |
   |------------------------------------------------------------|
   |                Setting                 |        J4         |
   |----------------------------------------+-------------------|
   |>> |    Chassis ground connected to     | pins 1 & 8 closed |
   |   |           digital ground           |                   |
   |---+------------------------------------+-------------------|
   |   |     Chassis ground provided by     |  pins 1 & 8 open  |
   |   |          computer chassis          |                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       DTE/DCE SELECT                       |
   |------------------------------------------------------------|
   |        Setting        |                 J4                 |
   |-----------------------+------------------------------------|
   |>> | DTE configuration |  pins 2 & 9, 3 & 10, 4 & 11, 5 &   |
   |   |                   |     12, 6 & 13, 7 & 14 closed      |
   |---+-------------------+------------------------------------|
   |   | DCE configuration | pins 2 & 3, 4 & 5, 6 & 7, 9 & 10,  |
   |   |                   |      11 & 12, 13 & 14 closed       |
   |---+-------------------+------------------------------------|
<gopher://bitreich.org/I/th99/i/P-R/50610-2.png>
   |   |           | [3][IMG]                           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      INTERRUPT SOURCE                      |
   |------------------------------------------------------------|
   |              Setting               |          J5           |
   |------------------------------------+-----------------------|
   |>> | From communications controller |   pins 1 & 2 closed   |
   |---+--------------------------------+-----------------------|
   |   |    From DMA terminal count     |   pins 5 & 6 closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        RTS/CTS MODE                        |
   |------------------------------------------------------------|
   |            Setting             |            J5             |
   |--------------------------------+---------------------------|
   |>> |  RTS/CTS connected to CN1  | pins 3 & 4, 7 & 8 closed  |
   |---+----------------------------+---------------------------|
   |   |  RTS/CTS loopback enabled  |     pins 3 & 7 closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   TRANSMIT CLOCK SOURCE                    |
   |------------------------------------------------------------|
   |           Source           |              J6               |
   |----------------------------+-------------------------------|
   |>> |        Internal        |       pins 2 & 3 closed       |
   |---+------------------------+-------------------------------|
   |   |        External        |       pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    RECEIVE CLOCK SOURCE                    |
   |------------------------------------------------------------|
   |           Source           |              J7               |
   |----------------------------+-------------------------------|
   |>> |        Internal        |       pins 2 & 3 closed       |
   |---+------------------------+-------------------------------|
   |   |        External        |       pins 1 & 2 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      -SYNC/IPS SELECT                      |
   |------------------------------------------------------------|
   |                 Source                 |        J8         |
   |----------------------------------------+-------------------|
   |>> | 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       |                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |          SYNCHRONOUS BLOCK TRANSFER COMPATIBILITY          |
   |------------------------------------------------------------|
   |                Setting                |         J9         |
   |---------------------------------------+--------------------|
   |>> |      Block Transfer software      | pins 1 & 2 closed  |
   |   |            compatible             |                    |
   |---+-----------------------------------+--------------------|
   |   |     Quatech REV A compatible      | pins 2 & 3 closed  |
   |------------------------------------------------------------|
   | Note:The location of jumper J9 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-1020 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-1020  |
   |   |   requires 8 consecutive address locations.            |
   +------------------------------------------------------------+