Iei-integration PICOe-HM650 Uživatelský manuál stáhnout pdf (Strana 167)

PICOe-HM650 Half-size PCIe CPU Card

Page 153

D.3 Assembly Language Samples

D.3.1 Enable the DIO Input Function

The BIOS interrupt call INT 15H controls the digital I/O. An assembly program to enable

digital I/O input functions is listed below.

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

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Iei-integration PICOe-HM650 Uživatelský manuál Strana 167