D.3.2 enable the dio output function – IEI Integration SPCIE-C2260-i2 User Manual

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SPCIE-C2260-i2 PICMG 1.3 CPU Card

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MOV AX,

6F08H

Sets the digital port as input

INT 15H Initiates the INT 15H BIOS call

D.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