PC Engines ALIX.1C Manual page 17

J25 I2C header
This optional header can be used to connect user specific hardware, e.g. a front panel
microcontroller, or for a licensing dongle.
1 +3.3V
2 SMB_SCL
3 SMB_SDA
4 GND
J21 IDE header
1 HDRST#
2 GND
3 HDD7
4 HDD8
5 HDD6
6 HDD9
7 HDD5
8 HDD10
9 HDD4
10 HDD11
11 HDD3
12 HDD12
13 HDD2
14 HDD13
15 HDD1
16 HDD14
17 HDD0
18 HDD15
19 GND
20 key
21 HDRQ
22 GND
23 HDIOW#
24 GND
25 HDIOR#
26 GND
27 HDIORDY
28 CSEL
29 HDACK#
30 GND
31 HDIRQ
32 nc
33 HDA1
34 HDPDIA#
35 HDA0
36 HDA2
37 HDCS0#
38 HDCS1#
39 HDLED#
40 GND
ALIX system board
power supply
I2C clock
I2C data
ground
IDE reset
ground
IDE data 7
IDE data 8
IDE data 6
IDE data 9
IDE data 5
IDE data 10
IDE data 4
IDE data 11
IDE data 3
IDE data 12
IDE data 2
IDE data 13
IDE data 1
IDE data 14
IDE data 0
IDE data 15
ground
key pin (missing)
IDE DMA request
ground
IDE I/O write
ground
IDE I/O read
ground
IDE I/O ready
cable select (pull down)
IDE DMA acknowledge
ground
IDE interrupt
no connect
IDE address 1
IDE diagnostic, 80 pin cable ID
IDE address 0
IDE address 2
IDE chip select 0
IDE chip select 1
IDE led output
ground
17 2/21/2008