American Megatrends III User Manual page 32

Step 6 Onboard I/O
Onboard I/O The Apollo III motherboard has:
two serial ports (COM1 and COM2),
a parallel port (LPT),
an IDE controller on the PCI bus. The primary IDE connector is IDE1.
The secondary connector is IDE2.
a floppy controller (FDD).
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 Apollo III motherboard for a hard disk or floppy controller and
serial or parallel ports.
Serial Ports COM1 and COM2 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
1
2
3
4
5
28 Apollo III PCI Pentium ISA Motherboard User's Guide
Description Pin
Carrier Detect 6
Receive Data 7
Transmit Data 8
Data Terminal 9
Ready
Ground 10
Signal Description
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
CUT PIN
Cont'd