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Kd 9170n, B.3.2 enable the dio output function – Acnodes KD 9170N User Manual

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KD 9170N

17” Short Depth Monitor Keyboard

Drawer

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