Asus P4T533-C - Manual (Page 44)

30 Chapter 2: Hardware information
3. Universal Serial Bus Ports: USB 1.1 and USB 2.0
(four x 4-pin USB)
Four USB ports are available for connecting USB devices.
5. Serial Ports (Teal/Turquoise Two x 9-pin COM1)
Two serial ports can be used for pointing devices or other serial devices.
To enable these ports, see Onboard Serial Port 1 in 4.4.2 I/O Device
Configuration for the settings.
4. Parallel Port (Burgundy 25-pin PRINTER)
You can enable the parallel port and choose the IRQ through Onboard
Parallel Port (see 4.4.2 I/O Device Configuration).
Universal Serial Bus
Port 1
Port 4
USB 2.0 Port 2 USB 1.1 Port 3
COM1
Serial Ports (9-pin Male)
COM2
Parallel Port (25-pin Female)
Serial printers must be connected to the serial port.