×

Data processing system

  • US 4,118,695 A
  • Filed: 12/05/1974
  • Issued: 10/03/1978
  • Est. Priority Date: 12/05/1973
  • Status: Expired due to Term
First Claim
Patent Images

1. In a data processing system having display means including an electronic graphic display device to display input data representing a predetermined number of characters, input means to enter data into the display device and output means to output the data, the improvement comprising:

  • memory means connected between the display means and the output means;

    control means operatively connected to control the display means;

    memory means and output means to selectively transfer data from the display means to the memory means and store the data therein and transfer the data from the memory means to the output means;

    wherebydata stored in the memory means may be transferred to the output means while new data is being entered into the display means;

    in which the input data may comprise a field mark or character to divide the predetermined number of characters into two fields of characters, the display means comprising field mark detection means to detect the field mark;

    in which the input data may comprise an instruction to insert a character at a designated location in the data between the beginning of the data and the field mark, the display means comprising data insertion means to enter the designated character into the display at the designated location and shift the following characters toward the end of the data, the field mark detection means being operative to sense the input data and inhibit the insertion means if the field mark detection means detects the field mark proceded by a character; and

    in which the input data may further comprise an instruction to delete a character at a designated location in the data between the beginning of the data and the field mark, the display means comprising deletion means to delete the character at the designated location and shift the following characters toward the beginning of the data to fill in the blank spaces produced by the deletion, the field mark detection means being operative to sense the input data and inhibit the deletion means if the field mark detection means detects the field mark from shifting characters following the field mark in the data.

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