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# QUATECH, INC.
SCB-1020
Card Type Serial controller
Chipset/Controller NEC
I/O Options Serial port
Maximum DRAM N/A
IMG IMG 1
+------------------------------------------------------------+
| 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 |
|---+-------------------+------------------------------------|
IMG IMG 2
| | | [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. |
+------------------------------------------------------------+