TANDY/RADIO SHACK

RS-232 UPGRADE BOARD

Card Type               Serial card
Chip Set                Unidentified
Maximum Onboard Memory  Unidentified
I/O Options             Serial port
Hard Drives supported   None
Floppy drives supported None
Data Bus                SBus
Card Size               Half-length, full-height card

[Image]

                                CONNECTIONS

          Function            Label            Function             Label

  DB-25 serial port           CN1     Sbus interface                CN2

           BASE I/O ADDRESS AND INTERRUPT SELECTION

    Address      IRQ     SW1/1      SW1/2    SW1/3     SW1/4

  COM1 (3F8h)     4       Off        Off      Off       On

  COM2 (2F8h)     3       Off        On       Off       On

  COM3 (3E8h)     4        On        Off      Off       On

  COM3 (3E8h)     2        On        Off       On       On

  COM4 (2F8h)     3        On        On       Off       On

  COM4 (2F8h)     5        On        On        On       On