SEALEVEL SYSTEMS, INC.

ACB 56

Card Type               Serial card
Chip Set                Unidentified
Maximum Onboard Memory  Unidentified
I/O Options             Serial ports (2)
Hard Drives supported   None
Floppy drives supported None
Data Bus                16-bit ISA
Card Size               Full-length, full-height

[Image]

                                CONNECTIONS

          Function            Label            Function             Label

  Serial Port 1 (V.35)         P3      Serial Port 2 (RS-232)        P4

                        USER CONFIGURABLE SETTINGS

                 Function                   Label          Position

  »   Factory configured - do not alter       E2         Unidentified

  »   Factory configured - do not alter       E3         Unidentified

  »   Factory configured - do not alter       E4         Unidentified

  »   Factory configured - do not alter       E8         Unidentified

  »   Port 2 enabled                          E9            Closed

      Port 2 disabled                         E9             Open

  »   Port 1 enabled                         E10            Closed

      Port 1 disabled                        E10             Open

  »   Factory configured - do not alter      E11         Unidentified

  Note: The size and orientation of E2, E3, E4, E8, and E11 is
  unidentified.

                        BASE I/O ADDRESS SELECTION

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

  »   238h     Off      On       On       On      Off      Off      Off

      280h     Off      On      Off       On      On       On       On

      2A0h     Off      On      Off       On      Off      On       On

      2E8h     Off      On      Off      Off      Off      On       Off

      300h     Off      Off      On       On      On       On       On

      328h     Off      Off      On       On      Off      On       Off

      3E8h     Off      Off     Off      Off      Off      On       Off

                             SERIAL PORT INTERRUPT SELECTION

   IRQ      E6/A     E6/B     E6/C     E6/D    E6/E     E6/F     E6/G     E6/H     E6/I

      2/9  Closed    Open     Open     Open    Open     Open     Open     Open     Open

      3     Open    Closed    Open     Open    Open     Open     Open     Open     Open

      4     Open     Open    Closed    Open    Open     Open     Open     Open     Open

  »   5     Open     Open     Open    Closed   Open     Open     Open     Open     Open

      7     Open     Open     Open     Open    Closed   Open     Open     Open     Open

      10    Open     Open     Open     Open    Open     Closed   Open     Open     Open

      11    Open     Open     Open     Open    Open     Open     Closed   Open     Open

      12    Open     Open     Open     Open    Open     Open     Open     Closed   Open

      15    Open     Open     Open     Open    Open     Open     Open     Open    Closed

                      SERIAL INTERRUPT MODE SELECTION

              IRQ                       E6/J                  E6/K

  »   Normal interrupt mode            Closed                 Open

      Shared interrupt mode             Open                 Closed

                         DMA TRI-STATE DRIVER MODE

                  Mode                        E7/G             E7/H

  DMA -State drivers permanently             Closed            Open
  enabled

  DMA Tri-State drivers enabled by            Open            Closed
  status/control port bit 7

  DMA disabled                                Open             Open

                    DMA CHANNEL SELECTION (HALF-DUPLEX)

  Channel     E1/A      E1/B      E1/C       E1/D      E1/E        E1/F

     1        Open      Open      Open      Closed     Open       Closed

     3        Open      Open      Open      Closed    Closed       Open

  Note: DMA must be enabled by setting the DMA Tri-State driver mode.

                DMA CHANNEL SELECTION (HALF-DUPLEX) (CON’T)

  Channel      E7/A       E7/B       E7/C       E7/D       E7/E     E7/F

     1         Open       Open       Open      Closed      Open     Open

     3         Open      Closed      Open       Open       Open     Open

                    DMA CHANNEL SELECTION (FULL DUPLEX)

       Channel          E1/A     E1/B     E1/C     E1/D     E1/E    E1/F

      1 Receive/3      Closed    Open     Open    Closed    Open    Open
      Transmit data

  »   1 Transmit/3     Closed    Open     Open    Closed    Open    Open
      Receive data

  Note: DMA must be enabled by setting the DMA Tri-State driver mode.

                DMA CHANNEL SELECTION (FULL DUPLEX) (CON’)

      Channel         E7/A     E7/B      E7/C     E7/D     E7/E    E7/F

      1 Receive/3     Closed   Open      Open     Closed   Open   Closed
      Transmit
      data

  »   1 Transmit/3    Open     Closed   Closed    Open     Open   Closed
      Receive data

                           CLOCK INPUT MODES

              MODE                                E5

         Normal receive                   Pins 1 & 2 closed

        Inverted receive                  Pins 3 & 4 closed

        Normal transmit                   Pins 5 & 6 closed

       Inverted transmit                  Pins 7 & 8 closed

  Transmit clock input enabled            Pins 9 & 10 closed