user manual

Chapter 5 Installation
AI5VG Pentium VP3 Baby AT Motherboard User’s Manual 23
5.5 J7, J6: Serial Ports
The onboard serial ports of the AI5VG are 10 pin-header connectors. J7
is COM1 and J6 is COM2. The following table shows the pin out of the
these connectors.
Pin # Signal Name
1 DCD, Data carrier detect
2 RXD, Receive data
3 TXD, Transmit data
4 DTR, Data terminal ready
5 GND, ground
6 DSR, Data set ready
7 RTS, Request to send
8 CTS, Clear to send
9 RI, Ring indicator
10 Not Used
5.6 J8: Floppy Drive Connector
J8 of the AI5VG 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