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Computer system with a variety of applications and method for operating the same

  • US 6,003,131 A
  • Filed: 03/20/1997
  • Issued: 12/14/1999
  • Est. Priority Date: 03/20/1996
  • Status: Expired due to Term
First Claim
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1. A computer system, comprising:

  • a bus for communicating information;

    a power supply supplying first and second supply voltages;

    a switch circuit for selecting the additional functions;

    a read only memory unit coupled with the bus, for storing a set of basic input/output system routines which control input and output peripherals of the computer system;

    an auxiliary memory unit coupled with the bus, for storing a set of operating system routines which control operation of the computer system for the purpose of obtaining an efficient performance of the system;

    an additional function memory unit coupled with the bus, for storing multiple sets of application routines which execute the additional functions respectively;

    a central processing unit coupled with the bus, for processing information according to instructions of the routines;

    a random access memory unit coupled with the bus, for storing the instructions, the information, temporary variables and immediate information during execution of the instructions by said central processing unit temporarily; and

    a booting control circuit operated with said first supply voltage, for generating a power control signal and an interrupt request signal when at least one of the additional functions is selected, said power supply to apply said second supply voltage to the central processing unit, the memory, and the input/output peripherals in response to said power control signal, and said central processing unit loads the basic input/output system routines and the application routines into said random access memory unit in order, in response to said interrupt request signal.

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