
                               Quadram Corp.
                          4355 International Blvd.
                             Norcross, GA 30093
                               (404) 923-6666

                             BBS (404) 564-5678

                      Quadram Quadboard Documentation

          (Adapted from a transcription created August 12, 1991.)

     Both the 256K and 384K Quadboard use 64K DRAM only.  On the swit-
     ches, up is enabled, down is disabled.  

     384K QUADBOARD:

     First we will  discuss the  384K  Quadboard.   The part number is
     8936.

     Switch 1 is the game  port.  Switch 2 is the clock.   Switch 3 is
     parity enable.  Switch 4 is memory enable.  Switches 5, 6, 7, and
     8 set the starting  address for the board  and will be  discussed
     later in this message. 

     Setting I/O  Ports.  Ports are set up using jumpers at the bottom
     of the board, above  the goldfingers, counting pins from  left to
     right. Pins 1 and 2 equal LPT1, 2 and 3 equal LPT2.  Pins 5-6 and
     7-8 equal COM1, 4-5 and 8-9 COM2.  

     Starting addresses  are the switches 5,  6, 7, and 8, on the 384K
     Quadboard and switches 1, 2, 3, and 4 on switchbank 1 on the 256K
     Quadboard.  These switches work the same way for both boards.  

     384K:            5     6     7     8
     256K (1):        1     2     3     4
          For 64K:   ON    ON    ON    OFF
          For 128K:  ON    ON    OFF   ON
          For 256K:  ON    OFF   ON    ON
          For 512K:  OFF   ON    ON    ON

     Any other starting  address will  be a combination  of the  above
     settings.  I.e., use 64K and 128K for a 192K starting address. 

     256K QUADBOARD:

     Now we will discuss the 256K Quadboard.  The part number is 8914.

     Switchbank 1:

     Switches 1 through 4 are the starting address. Switches 5 through
     8 are for the memory on the board.  Starting at switch 8, turn on
     one switch for each bank populated. 

     Switchbank 2:

     Switch 1 is for parity.  Switch 2 is  for the clock.  Switch 3 is
     always off.  Switch 4 is to enable the parallel port.  Switches 5
     through 8 are for serial and parallel port selection: 

              5     6      7     8
     LPT2:   ON    OFF     -     -
     LPT1:   OFF   ON      -     -
     COM1:    -     -     ON    OFF
     COM2:    -     -     OFF   ON 

     Move jumpers  at the bottom of  the board to correspond  with the
     switch settings.  Turn off switches to disable. 

     END
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