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The DIO connector on the WAFER-ULT5 is interfaced to GPIO ports on the Super I/O
chipset. The digital inputs and digital outputs are generally control signals that control the
on/off circuit of external devices or TTL devices. Data can be read or written to the
selected address to enable the DIO functions.
NOTE:
For further information, please refer to the datasheet for the Super I/O
chipset.
The BIOS interrupt call INT 15H controls the digital I/O.
INT 15H:
AH – 6FH
Sub-function:
AL – 8
AL
Assembly Language Sample 1
MOV
AX, 6F08H
INT
15H
AL low byte = value
Page 108
:Set the digital port as INPUT
:Digital I/O input value
;setting the digital port as input
;
WAFER-ULT5 SBC
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