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Secondary cache system for portable computer

  • US 5,632,038 A
  • Filed: 02/22/1994
  • Issued: 05/20/1997
  • Est. Priority Date: 02/22/1994
  • Status: Expired due to Term
First Claim
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1. A power management system for a portable computer, the power management system comprising:

  • a system memory for storing and accessing dam;

    a processor that accesses data from the system memory and which transmits data to the system memory for storage;

    a cache electrically connected to said processor and to said system memory for expediting the transfer of data between the processor and the system memory;

    said cache including a cache controller and a cache memory;

    wherein the cache controller includes a control register with a bit that is variable between a first and a second value and the value of the bit determines whether power is applied to the cache memory; and

    control logic electrically connected to said cache for selectively providing power to said cache.

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