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PC 6408
8” Fanless Panel PC
B.3.2 ENABLE THE DIO OUTPUT FUNCTION
The BIOS interrupt call INT 15H controls the digital I/O. An assembly program to enable digital I/O
output functions is listed below.
MOV AX, 6F09H Sets the digital port as output
MOV BL, 09H
INT 15H Initiates the INT 15H BIOS call