×

Method and apparatus for data backup and restoration in a portable data device

  • US 6,317,755 B1
  • Filed: 07/26/1999
  • Issued: 11/13/2001
  • Est. Priority Date: 07/26/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A data backup and restoration method for a portable data device comprising the steps of:

  • mapping a memory device into a plurality of segments, and having a backup memory buffer;

    loading a plurality of user applications into the plurality of segments, wherein the backup memory buffer is shared by the plurality of user applications;

    storing a valid state of data from a memory location into the backup memory buffer prior to performing a transaction for an application; and

    restoring the valid state of data from the backup memory buffer into the memory location upon power up of the portable data device in an event the transaction is terminated prior to completion, wherein the step of restoring is independent of a next application in which a next transaction is performed.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×