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PCI/ISA System Board
48
Serial Ports
The built-in serial ports are RS-232C asynchronous
communication ports with 16C550-compatible UARTs
that can be used with modems, serial printers, remote
display terminals, and other serial devices. The
G486VPB system board supports IRQ4 for the primary
serial port and IRQ3 for the secondary serial port. These
serial ports use the following system I/O addresses:
Connecting the Serial Ports
Two DB-9P serial port cables are provided with the
motherboard. They are mounted on a card-edge bracket
along with the PS/2 mouse cable. The upper serial port
cable should be used for the COM1 primary serial port;
connect it to Connector J1 on the motherboard. The
lower serial port cable should be used for the COM2
secondary serial port; connect it to Connector J2 on the
motherboard. Make sure the colored stripes on the
ribbon cables align with pin 1 of Connectors J1 and J2.
Mount the card-edge bracket to the system chassis.
I/O Address
3F8h
2F8h
3E8h
2E8h
Port Configuration
COM1
COM2
COM3
COM4