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Chapter 3 Installation 37
Step 10 Connect Onboard I/O
Onboard Adapters The Apollo Pentium PCI motherboard has:
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two serial ports,
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a parallel port,
•
an IDE controller on the PCI bus (Primary drive and Secondary drive, and
•
a floppy connector.
The serial and parallel port connectors are described below. The IDE connector is described on page 41. The
floppy connector is described on page 39.
Conflicts AMIBIOS minimize conflicts between onboard and offboard I/O devices.
AMIBIOS automatically checks the adapter cards installed in the expansion slots on the Apollo motherboard
for a hard disk or floppy controller and serial or parallel ports.
COM1 and COM2 These are 10-pin bergs that provide an AT-compatible serial port interface. The serial port pinouts are:
Pin Signal Description
1 Carrier Detect
2 Receive Data
3 Transmit Data
4 Data Terminal Ready
5 Ground
6 Data Set Ready
7 Request to Send
8 Clear to Send
9 Ring Indicator
Cont’d