
5-12 Floppy, IDE and SAS Connections
Use the following information to connect the fl oppy and hard disk drive cables.
The fl oppy disk drive cable has seven twisted wires.
A red mark on a wire typically designates the location of pin 1.
A single fl oppy disk drive ribbon cable has 34 wires and two connectors to provide for two fl oppy disk drives. The connector with twisted wires always connects to drive A, and the connector that does not have twisted wires always connects to drive B.
The
Floppy Connector
Floppy Drive Connector Pin Definitions (JFDD1)
The fl oppy connector is desig- nated JFDD1. See the table at right for pin defi nitions.
Pin# Defi nition
1Ground
3Ground
5Key
7Ground
9Ground
11 Ground
13 Ground
15Ground
17Ground
19Ground
21Ground
23Ground
25Ground
27Ground
29 Ground
31 Ground
33 Ground
Pin # Defi nition
2FDHDIN
4Reserved
6FDEDIN
8Index
10Motor Enable
12Drive Select B
14 Drive Select B
16Motor Enable
18DIR
20 STEP
22 Write Data
24Write Gate
26Track 00
28Write Protect
30 Read Data
32 Side 1 Select
34 Diskette