Asus AW1500-I5 - Manual (Page 24)

1-10 Chapter 1: Product introduction
USB 2.0 ports 1 and 2. These 4-pin Universal Serial Bus (USB)
ports are available for connecting USB 2.0 devices.
Serial ports. These 9-pin COM1/COM2 ports are for pointing
devices or other serial devices.
USB 2.0 ports 3 and 4. These 4-pin Universal Serial Bus (USB)
ports are available for connecting USB 2.0 devices.
PS/2 keyboard port. This purple 6-pin connector is for a PS/2
keyboard.
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