Vianet Board  (260-1221)           Settings            Faxback Doc. # 5606

JUMPER      INTERRUPT
* JP5        IRQ2 (default)
  JP4        IRQ3
  JP3        IRQ4
  JP2        IRQ5
  JP1        IRQ7

*NOTE: The memory segment address & interrupts have to be changed in your
       software to correspond to the interrupts & memory segments you have
       chosen on the interface board.

SWITCHES

The S1 switch bank configures both the I/O port address and the memory
segment address for the Vianet Board.  The DIP switch settings are a binary
encoding of numbers.  Examples are given below:

S1 settings for the Tandy 1000/1200   ON       | X  X |    X     (binary 0)
   3,6,10       ON                    OFF   XX |  XX  | XXX      (binary 1)
   All others   OFF                   =========================
   Base I/O port address = 360 Hex          11 | 0110 | 1110
   Memory segment address = E000 Hex  =========================
                                             3 |   6  |   E
                                    36+0 = Base I/O address of 360
                                    E+000 = Memory segment address of E000

S1 setting for the Tandy 3000         ON       | X  X |   X      (binary 0)
   3,6,9        ON                    OFF   XX |  XX  | XX X     (binary 1)
   All others   OFF                   =========================
   Base I/O port address = 360 Hex          11 | 0110 | 1101
   Memory segment address = D000 Hex  =========================
                                             3 |   6  |   D
                                    36+0 = Base I/O address of 360
                                    D+000 = Memory segment address of D000

S2 - Node Identification: Dip switch S2 selects the station number.  The
settings are a binary encoding of the numbers 0 to 255 (decimal). Each
switch represents a digit in the 8 bit binary number.  A switch set to down
or "OFF" equals bit ON or binary "1".  Switch S2-1 is the least significant
bit.  Be sure that each ViaNet board in the system has a unique setting.

*NOTE: The memory segment address & interrupts have to be changed in your
software to correspond to the interrupts & memory segments you have chosen
on the interface board.

(DTC/jlc-03/28/94)