User manual

IMB-Q670 Micro-ATX Motherboard
Page 126
C.1 Introduction
The DIO connector on the IMB-Q670 is interfaced to GPIO ports on the Super I/O chipset.
The DIO has both 4-bit digital inputs and 4-bit digital outputs. 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.
C.2 DIO Connector Pinouts
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 GND 2 +5V
3 D_IN0 4 D_OUT0
5 D_IN1 6 D_OUT1
7 D_IN2 8 D_OUT2
9 D_IN3 10 D_OUT3
11 D_8IN0 12 D_8OUT0
13 D_8IN1 14 D_8OUT1
15 D_8IN2 16 D_8OUT2
17 D_8IN3 18 D_8OUT3
Table 5-2: Digital I/O Connector Pinouts
C.3 Assembly Language Samples
C.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.