
SEA LEVEL SYSTEMS, INC.

ACB-IV

Card Type   Serial card
Chip Set    Unidentified
I/O Options Serial port
Data Bus    8-bit ISA

[Image]

         CONNECTIONS

   Function        Label

  Serial port        P1

                        USER CONFIGURABLE SETTINGS

                 Function                    Label         Position

     Factory configured  do not alter       E4         Unidentified

     Factory configured  do not alter       E6         Unidentified

     Factory configured  do not alter       E7         Unidentified

     Factory configured  do not alter       E9         Unidentified

     Factory configured  do not alter       E10        Unidentified

     Factory configured  do not alter       SW2        Unidentified

                          SERIAL PORT 1 SELECTION

                Setting                                 E2

         Enabled (RS-485 only)                  Pins 1 & 2 closed

  Transmit clock input (TXC in on pins          Pins 3 & 4 closed
            12 & 15 of P1)

   Transmit clock output (TXC out on            Pins 5 & 6 closed
          pins 12 & 15 of P1)

  Receive clock input (RXC in on pins           Pins 7 & 8 closed
                9 & 17)

               Not used                          Pins 9 & 10 open

   Transmit clock output (TXC out on           Pins 11 & 12 closed
          pins 12 & 15 of P1)

   Transmit clock output (TXC out on           Pins 13 & 14 closed
          pins 12 & 15 of P1)

               Not used                         Pins 15 & 16 open

               Not used                         Pins 17 & 18 open

                          SERIAL PORT 2 SELECTION

                Setting                                 E1

         Enabled (RS-485 only)                  Pins 1 & 2 closed

  Transmit clock input (TXC in on pins          Pins 3 & 4 closed
            12 & 15 of P1)

   Transmit clock output (TXC out on            Pins 5 & 6 closed
          pins 12 & 15 of P1)

  Receive clock input (RXC in on pins           Pins 7 & 8 closed
                9 & 17)

               Not used                          Pins 9 & 10 open

   Transmit clock output (TXC out on           Pins 11 & 12 closed
          pins 12 & 15 of P1)

   Transmit clock output (TXC out on           Pins 13 & 14 closed
          pins 12 & 15 of P1)

               Not used                         Pins 15 & 16 open

               Not used                         Pins 17 & 18 open

       SERIAL PORT INTERRUPT SELECTION

          IRQ                    E8

          2/9            Pins 1 & 2 closed

           3             Pins 3 & 4 closed

           4             Pins 5 & 6 closed

           5             Pins 7 & 8 closed

    Normal IRQ mode      Pins 9 & 10 closed

    Multi IRQ mode      Pins 11 & 12 closed

                        BASE I/O ADDRESS SELECTION

  Setting    SW1/1    SW1/2    SW1/3    SW1/4    SW1/5    SW1/6    SW1/7

    238       Off      On       On       On       Off      Off      Off

    280       Off      On       Off      On       On       On       On

    2A0       Off      On       Off      On       Off      On       On

    2E8       Off      On       Off      Off      Off      On       Off

    300       Off      Off      On       On       On       On       On

    328       Off      Off      On       On       Off      On       Off

    3E8       Off      Off      Off      Off      Off      On       Off

                           DMA CHANNEL SELECTION

                Channel                                 E3

          1  two channel mode                  Pins 1 & 2 closed

          3  two channel mode                  Pins 1 & 2 closed

       Two channel A/B mode A3B1                Pins 3 & 4 closed

       Two channel A/B mode A1B3                Pins 5 & 6 closed

  Closed = channel A, Open = channel B          Pins 7 & 8 closed

       3  acknowledges channel 3               Pins 9 & 10 closed

       1  acknowledges channel 1              Pins 11 & 12 closed

                               DMA SELECTION

                  Setting                                 E5

      SCC channel A/B uses channel 3              Pins 1 & 2 closed

       SCC channel A uses channel 3               Pins 3 & 4 closed

      SCC channel A/B uses channel 1              Pins 5 & 6 closed

       SCC channel A uses channel 3               Pins 7 & 8 closed

   SCC channel B enabled for half duplex          Pins 9 & 10 closed
               DMA transfers

  SCC channel A  DMA channel 1/3 for full       Pins 11 & 12 closed
             duplex transfers

     DMA tri state drivers permanently           Pins 13 & 14 closed
                  enabled

  DMA tri state drivers enabled by status        Pins 15 & 16 closed
            control port bit 7

