17
Serial Ports
The built-in serial ports are RS-232C asynchronous communication
ports with 16C550A-compatible UARTs that can be used with modems,
serial printers, remote display terminals, and other serial devices. They
use the following system I/O addresses:
Built-in Ports
The C586VX/E system board is equipped with two serial ports, one par-
allel printer port, one FDD connector, two IDE hard disk connectors and
one PS/2 mouse connector. Refer to page 6 for the locations of the
built-in connectors and pin 1 of those connectors.
Port Configuration
Serial Port 1
Serial Port 2
COM1
3F8h*
3F8h
COM2
2F8h
2F8h*
COM3
3E8h
3E8h
COM4
2E8h
2E8h
* Default
2-3 On: Mono
1-2 On: Color
(default)
3
2
1
3
2
1
Connecting the Serial Ports
Two serial port cables mounted on a card-edge bracket are provided
with the system board. Connect one serial port cable to connector J4
for COM 1 primary serial port and the other serial port cable to connec-
tor J5 for COM 2 secondary serial port. Make sure the colored stripes
on the ribbon cables are aligned with pin 1 of connectors J4 and J5.
Mount the card-edge bracket to the system chassis.
PS/2 Mouse Port
The PS/2 mouse port is a 6-pin connector on the system board. Attach
the 6-pin mouse port cable, which is mounted on a card-edge bracket,
