QUATECH, INC.

BCA-100

Card Type          Serial/Parallel interface
Chipset/Controller Zilog
I/O Options        Serial/Parallel port
Maximum DRAM       N/A

[Image]

                                CONNECTIONS

          Purpose             Location         Purpose        Location

  DB-25 serial/parallel          CN1        Standy clock         J4
  port                                      output

                    BASE MEMORY ADDRESS SELECT

  Address    SW1/1    SW1/2    SW1/3     SW1/4    SW1/5     SW1/6

   27Xh       Off       On       On       Off      Off       Off

   2EXh       Off       On      Off       Off      Off       On

   2FXh       Off       On      Off       Off      Off       Off

   37Xh       Off      Off       On       Off      Off       Off

   3EXh       Off      Off      Off       Off      Off       On

   3FXh       Off      Off      Off       Off      Off       Off

            CLOCK SPEED SELECT

      Divide by               J7

          1           Pins 1 & 2 closed

          2           Pins 2 & 3 closed

       DTE/DCE CONFIGURATION

   Jumper     J5 (DTE)   J6 (DCE)

     A          On         Off

     B          On         Off

     C          On         Off

     D          On         Off

     E          On         Off

     F          Off        Off

     G          On          On

     H          On         Off

     I          Off        Off

     J          On         Off

     K          Off        Off

                          INTERRUPT SELECT

   IRQ       J1/A      J1/B     J1/C      J1/D     J1/E      J1/F

   IRQ2     Closed     Open     Open      Open     Open      Open

   IRQ3      Open     Closed    Open      Open     Open      Open

   IRQ4      Open      Open     Closed    Open     Open      Open

   IRQ5      Open      Open     Open     Closed    Open      Open

   IRQ6      Open      Open     Open      Open     Closed    Open

   IRQ7      Open      Open     Open      Open     Open      Closed

                           RECEIVE CLOCK SOURCE

        Source               J3/A             J3/B              J3/C

      TXCA clock              On               Off              Off

  RXCi external clock         Off              On               Off

         CLKA                 Off              Off               On

                           TRANSMIT CLOCK SOURCE

        Source               J2/A             J2/B              J2/C

      RXCA clock              On               Off              Off

  TXCi external clock         Off              On               Off

         CLKB                 Off              Off               On