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

   DDS-100

   Card Type          Waveform Synthesizer                        
   Chipset/Controller Unidentified                                
   I/O Options        Trigger/gate signal inputs                  
   Maximum DRAM       N/A                                         

<gopher://bitreich.org/I/th99/i/P-R/50563-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |        Purpose        | Location |   Purpose    | Location |
   |-----------------------+----------+--------------+----------|
   | Sine wave output      |   CN1    | Trigger/gate |   CN3    |
   |                       |          | input        |          |
   |-----------------------+----------+--------------+----------|
   | TTL square wave/time  |   CN2    |              |          |
   | mark output           |          |              |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                      INTERRUPT SELECT                      |
   |------------------------------------------------------------|
   |            IRQ             |              J1               |
   |----------------------------+-------------------------------|
   |>> |          IRQ5          |       Pins 7 & 8 closed       |
   |---+------------------------+-------------------------------|
   |   |          IRQ2          |       Pins 1 & 2 closed       |
   |---+------------------------+-------------------------------|
   |   |          IRQ3          |       Pins 3 & 4 closed       |
   |---+------------------------+-------------------------------|
   |   |          IRQ4          |       Pins 5 & 6 closed       |
   |---+------------------------+-------------------------------|
   |   |          IRQ6          |      Pins 9 & 10 closed       |
   |---+------------------------+-------------------------------|
   |   |          IRQ7          |      Pins 11 & 12 closed      |
   |---+------------------------+-------------------------------|
   |   |         IRQ10          |      Pins 13 & 14 closed      |
   |---+------------------------+-------------------------------|
   |   |         IRQ11          |      Pins 15 & 16 closed      |
   |---+------------------------+-------------------------------|
   |   |         IRQ12          |      Pins 17 & 18 closed      |
   |---+------------------------+-------------------------------|
   |   |         IRQ14          |      Pins 19 & 20 closed      |
   |---+------------------------+-------------------------------|
   |   |         IRQ15          |      Pins 21 & 22 closed      |
   |---+------------------------+-------------------------------|
   |   |        Disabled        |         All pins open         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  8254 CLOCK CONFIGURATION                  |
   |------------------------------------------------------------|
   |          Setting           |              J2               |
   |----------------------------+-------------------------------|
   |        10Mhz timer         |   Pins 1 & 2, 4 & 5 closed    |
   |----------------------------+-------------------------------|
   |       Cycle counter        |   Pins 2 & 3, 5 & 6 closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  8254 CLOCK OUTPUT SPEED                   |
   |------------------------------------------------------------|
   |           Output           |              J7               |
   |----------------------------+-------------------------------|
   |           Direct           |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |          Output/2          |       Pins 2 & 3 closed       |
   |------------------------------------------------------------|
   | Note: Clock input can not exceed 10Mhz.                    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SINE WAVE OUTPUT AMPLITUDE                 |
   |------------------------------------------------------------|
   |          Setting           |              J3               |
   |----------------------------+-------------------------------|
   |            + 5V            |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |            + 1V            |       Pins 2 & 3 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 SINE WAVE OUTPUT IMPEDANCE                 |
   |------------------------------------------------------------|
   |           Output           |              J4               |
   |----------------------------+-------------------------------|
   |           50ohm            |   Pins 1 & 2, 4 & 5 closed    |
   |----------------------------+-------------------------------|
   |           75ohm            |   Pins 1 & 2, 5 & 6 closed    |
   |----------------------------+-------------------------------|
   |           100ohm           |       Pins 1 & 2 closed       |
   |----------------------------+-------------------------------|
   |         Unfiltered         |   Pins 2 & 3, 5 & 6 closed    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CN2 OUTPUT OPTIONS                     |
   |------------------------------------------------------------|
   |           Setting           |              J5              |
   |-----------------------------+------------------------------|
   |         TTL output          |      Pins 3 & 6 closed       |
   |-----------------------------+------------------------------|
   |        Clock output         |      Pins 2 & 5 closed       |
   |-----------------------------+------------------------------|
   |      Time mark output       |      Pins 1 & 4 closed       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     CN3 INPUT OPTIONS                      |
   |------------------------------------------------------------|
   |            Setting            |             J6             |
   |-------------------------------+----------------------------|
   |    External trigger input     |           closed           |
   |-------------------------------+----------------------------|
   |       Gate signal input       |            open            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 I/O ADDRESS CONFIGURATION                  |
   |------------------------------------------------------------|
   |     Address      |         SW1         |        SW2        |
   |------------------+---------------------+-------------------|
   |>>    |   300h    |  1, 2, 3, 4, 5 & 6  | 1, 2, 3, 4 & 5 on |
   |      |           |         on          |                   |
   |------+-----------+---------------------+-------------------|
   |      |   240h    | 1, 2, 3, 4, 5, 6 &  |  1, 3, 4 & 5 on   |
   |      |           |        8 on         |                   |
   |------+-----------+---------------------+-------------------|
   |      |   6FC8h   |      1 & 4 on       |     3 & 4 on      |
   |------------------------------------------------------------|
   |   Note: The address range for the DDS-100 is from 0 to     |
   |   FFFFh. 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=8, SW1/2=4, SW1/3=2, SW1/4=1, SW1/5=8, SW1/6=4,    |
   |   SW1/7=2, SW1/8=1, SW2/1=8, SW2/2=4, SW2/3=2, SW2/4=1,    |
   |   SW2/5=8. The DDS-100 requires eight consecutive address  |
   |   locations.                                               |
   +------------------------------------------------------------+