User`s manual

CyberResearch
®
Motherboards MXGD Series
CyberResearch, Inc. 203
25 Business Park Drive P: [phone]; F: [phone]
Branford, CT USA www.cyberresearch.com
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