Intel System Board G4H875-N - Manual (Page 37)

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2
Hardware Installation
2 1 ON
COM 1 COM 2
2.5.2 Serial Ports
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G4H875-N is equipped with 2 onboard serial ports (COM 1:
CN3 and COM 2: CN4) - both in Teal/Turquoise color. It is also
equipped with two 9-pin connectors (COM 3: J14 and COM 4:
J16) for connecting external serial ports.
G4H875-C and G4H875-B are each equipped with COM 1 (CN3)
and COM 2 (CN4). COM 3 and COM 4 are not present on these
boards.
To use J14 or J16 to connect external serial ports, please refer to
the following description. The serial ports may be mounted on a
card-edge bracket. Install the card-edge bracket to the system
chassis then insert the cable connector to J14 or J16. Make sure
the colored stripe on the ribbon cable is aligned with pin 1 of
J14 or J16.
Serial por ts are RS-232C asynchronous communication por ts
with 16C550A-compatible UARTs that can be used with modems,
serial printers, remote display terminals, and other serial devices.
BIOS Setting
Select the serial ports’ I/O address in the Integrated Peripherals
submenu (“Super IO Device” section) of the BIOS. Refer to
chapter 3 for more information.
COM 3 COM 4
1 9
2
CD TD
RD DTR
SG
RTS
DSR CTS
RI
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G4H875-N only