Chapter 5 Installation
24 TI5VG Pentium VP3 ATX Motherboard User’s Manual
5.6 J4, J6: Serial Ports
The onboard serial ports of the TI5VG 10, J4 and J6, are two DB-9
external connectors. The following table shows the pin-out assignments
of the these connectors.
Pin # Signal Name Pin # Signal Name
1 DCD, Data carrier detect 6 DSR, Data set ready
2 RXD, Receive data 7 RTS, Request to send
3 TXD, Transmit data 8 CTS, Clear to send
4 DTR, Data terminal ready 9 RI, Ring indicator
5 GND, ground 10 Not Used
J5 (Parallel Port)
J4 (COM1 ) J6 (COM2)
5.7 J5: Parallel Port Connector
J5 is a DB-25 external connector. The following table describes the pin-
out assignments of this connector.
Signal Name Pin # Pin # Signal Name
Line printer strobe 1 14 AutoFeed
PD0, parallel data 0 2 15 Error
PD1, parallel data 1 3 16 Initialize
PD2, parallel data 2 4 17 Select
PD3, parallel data 3 5 18 Ground
PD4, parallel data 4 6 19 Ground
PD5, parallel data 5 7 20 Ground
PD6, parallel data 6 8 21 Ground
PD7, parallel data 7 9 22 Ground
ACK, acknowledge 10 23 Ground
Busy 11 24 Ground
Paper empty 12 25 Ground
Select 13 N/A N/A
