Assembly Language Samples; Enable The Dio Input Function; Enable The Dio Output Function - IEI Technology PCIE-9450 User Manual
Picmg 1.3 lga775 intel core 2 duo, pentium 4/d vga, dual pcie gbe, sata ii and usb2.0
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- Quick installation manual (3 pages) ,
- Quick installation manual (8 pages)
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PCIE-9450 PICMG 1.3 CPU Card
B.3 Assembly Language Samples
B.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
INT
15H
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
MOV
BL, 09H
INT
15H
Sets the digital port as input
Initiates the INT 15H BIOS call
Sets the digital port as output
Initiates the INT 15H BIOS call
Page 173
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