IDE Interface Connector
The on-board IDE Interface connector (IDE) is a 2x20-pin male header.
This interface supports up to two IDE hard disk drives on the system.
This interface can also be disabled in the event that no hard drive is
present or a separate hard drive controller is installed on the system.
Pin
Description
Pin
Description
2
Ground
1
IDE Reset/
4
Data 8
3
Data 7
6
Data 9
5
Data 6
8
Data 10
7
Data 5
10
Data 11
9
Data 4
12
Data 12
11
Data 3
14
Data 13
13
Data 2
16
Data 14
15
Data 1
18
Data 15
17
Data 0
20
No Connection
19
Ground
22
Ground
21
No Connection
24
Ground
23
I/O Write/
26
Ground
25
I/O Read/
28
ALE
27
No Connection
30
Ground
29
No Connection
32
IOCS16/
31
IDE IRQ 14
34
No Connection
33
Address A1
36
Address A2
35
Address A0
38
IDE Chip Select 1/
37
IDE Chip Select 0/
40
Ground
39
IDE Active/
Harddisk Activity LED Connector
The hard disk activity LED connector (HDLED) is a 2-pin keyed BERG
strip. It is used to connect to front panel hard disk LED.
Pin
Description
1
LED Anode (+)
2
LED Cathode (-)
Page 20 486MI System Board User's Manual