Chapter 5 Installation
24
AI5TT Pentium Baby AT Motherboard User
’
s Manual
5.7 J9: Floppy Drive Connector
J9 is a 34-pin header and will support up to 2.88MB floppy drives.
Signal Name
Pin #
Pin #
Signal Name
Ground 1 2 RM/LC
Ground 3 4 No
connect
Ground 5 6 No
connect
Ground 7 8
Index
Ground
9
10
Motor enable 0
Ground
11
12
Drive select 1
Ground
13
14
Drive select 0
Ground
15
16
Motor enable 1
Ground 17
18 Direction
Ground 19
20
Step
Ground 21
22 Write
data
Ground 23
24 Write
gate
Ground 25
26 Track
00
Ground 27
28
Write
protect
Ground 29
30 Read
data
Ground
31
32
Side 1 select
Ground 33
34
Diskette
change
5.8 J10: USB Connector
J10 is the onboard USB headers for the optional USB connector. The
following table shows the pin outs of these connectors.
Pin #
Signal Name
1 5
Vcc
2 6
USB-
3 7
USB+
1
2
3
4
USB
5
6
7
8
4 8
Ground
