Pc 6412, C.3.2 enable the dio output function – Acnodes PC 6412 User Manual

Page 104

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PC 6412

12.1” Fanless Panel PC

C.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

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