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Method and apparatus for transferring coordinate data between a host computer and display device

  • US 5,274,794 A
  • Filed: 01/22/1991
  • Issued: 12/28/1993
  • Est. Priority Date: 01/22/1991
  • Status: Expired due to Fees
First Claim
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1. A method for transferring a set of data whose members (A'"'"', B'"'"' . . . n'"'"') have selected independent ranges of values between a host computer and a remote device along a communication channel, comprising the steps of:

  • for each member (A'"'"', B'"'"' . . . n'"'"') of the set of data, determining a range of values the member may take on, each range having a magnitude (AMag, BMag, . . . , nMag) indicating the size of the range;

    for each member (A'"'"', B'"'"' . . . n'"'"') of the set of data, selecting an offset value (AOffs, Boffs, . . . , nOffs) associated with said member;

    transferring to the remote device information regarding the magnitudes (AMag, BMag, . . . nMag) of the ranges and the offsets (AOffs, BOffs, . . . , nOffs) associated with the members of the set of data;

    deriving a set of translated data (A, B, . . . , n) by subtracting from each member (A'"'"', B'"'"' . . . n'"'"') of the data set the offset (AOffs, BOffs, . . . , nOffs) value associated with said member; and

    converting the set of translated data (A, B, . . . n) to a single number (V) in accordance with the equation;

    ##EQU4##

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