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Method of and system for updating a display unit

  • US 5,043,919 A
  • Filed: 12/19/1988
  • Issued: 08/27/1991
  • Est. Priority Date: 12/19/1988
  • Status: Expired due to Term
First Claim
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1. In an information processing system having a host system which communicates with a remote system, a method of selectively updating a remote display unit associated with said remote system to display information being stored at said host system, said method comprising the steps of:

  • determining differences between information being displayed on said remote display unit and said information being stored at said host system to be displayed on said remote display unit by comparing the contents of a host display buffer with the contents of a remote display buffer associated with said remote display unit;

    selecting one of a plurality of change categories in response to said determined differences; and

    transmitting an update command from said host system to said remote system in response to said selected one of said plurality of change categories whereby only information which is different is transmitted to said remote system to update said remote display unit.

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