UNIDENTIFIED

RS-232C ADAPTER

Card Type              Serial card
Chip Set               Unidentified
Maximum Onboard Memory Unidentified
I/O Options            Serial ports (2)
Data Bus               8-bit ISA

[Image]

                           CONNECTIONS

        Function          Label         Function          Label

  Serial port 1           CN1     Serial port 2            CN2

  SERIAL PORT 1 ADDRESS SELECTION

  Setting       S1/1       S1/3

    3E8h        Off         On

    3F8h         On         Off

  Disabled      Off         Off

                      SERIAL PORT 2 ADDRESS SELECTION

          Setting                    S1/2                   S1/4

           2E8h                      Off                     On

           2F8h                       On                     Off

         Disabled                    Off                     Off

  Technical note: Must install an INS 8250 chip in slot IC4 to enable
  dual serial port capabilities. Or - 1488 into IC2 and 1489 into to U9.

  SERIAL PORT 1 INTERRUPT SELECTION

     IRQ         S1/5        S1/6

    IRQ3         Off          On

    IRQ4          On          Off

  Disabled       Off          Off

  SERIAL PORT 2 INTERRUPT SELECTION

     IRQ         S1/7        S1/8

    IRQ3         Off          On

    IRQ4          On          Of

   Disable       Off          Off