Patent ID: 7424623

Claim:
A personal computer (PC) adapted to function as a personal digital assistant (PDA) comprising: a central processing unit (CPU) responsive to a control signal to load a first operating system or a second operating system, wherein said first operating system is run by said PC in a first PC mode and said second operating system is run by said PC in a second PDA mode, and wherein said PC operating in said second PDA mode operates a plurality of PDA software applications selected from the group consisting of: Internet access application, wireless Internet access application, scheduling application, address book application, storage software application, voice recording application, Internet auction application, electronic mail access application, and Internet radio application; and an integrated circuit coupled to said CPU operable for receiving an instruction signal from a function key to enable execution of said plurality of PDA software applications, wherein said integrated circuit includes a LCD controller interface and an audio interface respectively for controlling a plurality of visual and audio effects associated with said plurality of PDA software applications according to said instruction signal if said PC operates in said second PDA mode, and wherein said audio interface is coupled between a system host audio interface and an audio subsystem of said PC for blocking signals from said system host audio interface if said PC operates in said second PDA mode, thereby controlling said audio effects.