American Megatrends III - Manual (Page 32)

Apollo III PCI Pentium ISA Motherboard User’s Guide 28
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 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