Ide Interface Connector; Harddisk Activity Led Connector - Intel 486MIS Quick Start Manual

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
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40

Harddisk Activity LED Connector

The hard disk activity LED connector (HDLED) is a 4-pin keyed BERG
strip. It is used to connect to front panel hard disk LED.
Pin
1
2
3
4
486MIS System Board User's Manual
Description
Ground
Data 8
Data 9
Data 10
Data 11
Data 12
Data 13
Data 14
Data 15
No Connection
Ground
Ground
Ground
ALE
Ground
IOCS16/
No Connection
Address A2
IDE Chip Select 1/
Ground
Pin
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
Description
LED Anode (+)
LED Cathode (-)
LED Cathode (-)
LED Anode (+)
Description
IDE Reset/
Data 7
Data 6
Data 5
Data 4
Data 3
Data 2
Data 1
Data 0
Ground
No Connection
I/O Write/
I/O Read/
No Connection
No Connection
IDE IRQ 14
Address A1
Address A0
IDE Chip Select 0/
IDE Active/
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