MegaPro Dual Pentium Pro PCI ISA Motherboard User’s Guide
30
Step 6 Attach Cables,
Continued
Onboard Adapters
The MegaPro PCI motherboard has:
•
two serial ports P4 and P5,
•
two USB connectors P14 and P15,
•
a parallel port P12,
•
a VGA connector P20,
•
an IDE controller on the PCI bus the primary IDE connector is P11
and the secondary IDE connector is P13, and
•
a floppy controller P10.
The serial and parallel port connectors are described below.
Conflicts
AMIBIOS minimizes conflicts between onboard and offboard I/O
devices. AMIBIOS automatically checks the adapter cards installed in
the expansion slots on the MegaPro PCI motherboard for a hard disk or
floppy controller and serial or parallel ports.
P4 SER1 P5 SER2
P4 and P5 are 9–pin connectors that provide an AT–compatible serial
port interface. Connect the cables supplied with the motherboard to P4
and P5. Pin 10 is cut. The serial port base I/O port address and other
serial port settings can be selected in Peripheral Setup in WINBIOS
Setup. The P4 and P5 pinout is:
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
P14, P15 USB Connectors
P14 and P15 are 4–pin USB connectors.
Cont’d
