Introduction - IEI Technology WAFER-CV-D25501 Series User Manual

D.1 Introduction
The DIO connector on the WAFER-CV-D25501/N26001 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
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WAFER-CV-D25501/N26001 3.5" SBC
:Set the digital port as INPUT
:Digital I/O input value