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Low-power CD-ROM player with CD-ROM subsystem for portable computer capable of playing audio CDs without supply energy to CPU

  • US 7,359,998 B2
  • Filed: 07/05/2006
  • Issued: 04/15/2008
  • Est. Priority Date: 06/16/2000
  • Status: Expired due to Fees
First Claim
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1. A computer system adapted to play an audio CD, said computer system comprising:

  • a computer subsystem comprising a system CPU, a digital-audio generating circuit, a digital computer bus coupling said CPU and said digital-audio generator circuit, and a digital computer bus controller; and

    a CD audio subsystem comprising an audio device capable of playing an audio CD and coupled to said digital computer bus controller, an audio amplifier circuit coupled to said audio device, and an output control logic for selectively decoupling an audio interface from said digital computer bus and coupling said audio interface to said digital computer bus in parallel to said digital computer bus controller,wherein said audio interface is adapted to generate at least one signal to operate said audio device and to play said audio CD when power is not being supplied to said computer subsystem.

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