Chapter 1 Hardware Installation
27
Step 6 Onboard I/O
Onboard I/O
The Atlas PCI-III motherboard has:
•
two serial ports (P1 and P2),
•
a parallel port (P4),
•
an IDE controller on the PCI bus. The primary IDE connector is P5. The
secondary connector is P9.
•
a floppy controller (P3).
The serial and parallel port connectors are described below. The floppy
connector is described on page 29. The IDE connector is described on page 30.
Conflicts
AMIBIOS minimizes conflicts between onboard and offboard I/O devices.
AMIBIOS automatically checks the adapter cards installed in the expansion
slots on the Atlas PCI-III motherboard for a hard disk or floppy controller and
serial or parallel ports.
Serial Ports
P1 and P2 are 10-pin connectors that provide an AT-compatible serial port
interface. Connect the cables supplied with the motherboard to the 10-pin serial
connectors. The serial port base I/O port address and other serial port settings
can be selected in Peripheral Setup in WINBIOS Setup. The serial connector
pinout is shown below.
Pin
Signal Description
Pin
Signal Description
1
Carrier Detect
6
Data Set Ready
2
Receive Data
7
Request to Send
3
Transmit Data
8
Clear to Send
4
Data Terminal
Ready
9
Ring Indicator
5
Ground
10
CUT PIN
Cont’d
