SDL COMMUNICATIONS, INC.

RISCOM/SA

Card Type              Serial
Chipset                Cirrus Logic CD2401
Maximum Onboard Memory 64KB SRAM
I/O Options            Serial ports (8)
Data Bus               16-bit ISA

[Image]

                                CONNECTIONS

        Function            Label            Function             Label

  RS-232 or RS-422            J2      RS-232 or RS-422 serial      J3
  serial ports via DB-78              ports via 100-pin
  connector                           Centronics connector

            Note:Standard DB-25 serial ports are provided on an included
            DB-78 adapter cable or 100-pin Centronics breakout box.

            The serial port connectors J2 and J3 are located on a
            daughterboard of the main card. Either of the daughterboard
            cards may be used. The exact size of the daughterboard and
            the location and type of the daughterboard connectors are
            unidentified.

                        USER CONFIGURABLE SETTINGS

                   Setting                      Label        Position

  »   Factory configured - do not alter         SW1/7           On

  »   Factory configured - do not alter         SW1/8           On

                                INTERRUPT SELECTION

  Setting     J1/A     J1/B     J1/C     J1/D    J1/E     J1/F     J1/G     J1/H

      IRQ3   Closed    Open     Open     Open    Open     Open     Open     Open

      IRQ4    Open    Closed    Open     Open    Open     Open     Open     Open

  »   IRQ5    Open     Open    Closed    Open    Open     Open     Open     Open

      IRQ7    Open     Open     Open    Closed   Open     Open     Open     Open

      IRQ10   Open     Open     Open     Open    Closed   Open     Open     Open

      IRQ11   Open     Open     Open     Open    Open     Closed   Open     Open

      IRQ12   Open     Open     Open     Open    Open     Open     Closed   Open

      IRQ15   Open     Open     Open     Open    Open     Open     Open     Closed

                        BASE I/O ADDRESS SELECTION

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

       000h      On        On        On         On        On        On

       010h      Off       On        On         On        On        On

       020h      On        Off       On         On        On        On

       030h      Off       Off       On         On        On        On

       040h      On        On        Off        On        On        On

  »    300h      On        On        On         On       Off        Off

       3B0h      Off       Off       On        Off       Off        Off

       3C0h      On        On        Off       Off       Off        Off

       3D0h      Off       On        Off       Off       Off        Off

       3E0h      On        Off       Off       Off       Off        Off

       3F0h      Off       Off       Off       Off       Off        Off

            Note: A total of 64 base address settings are available. The
            switches are a binary representation of the decimal memory
            addresses. SW1/6 is the Most Significant Bit and switch SW1/1
            is the Least Significant Bit. The switches have the following
            decimal values: SW1/6=512, SW1/5=256, SW1/4=128, SW1/3=64,
            SW1/2=32, SW1/1=16. Turn off the switches and add the values
            of the switches that are off to obtain the correct memory
            address. (Off=1, On=0)