Abstract A cathode-ray tube (CRT) display device for alphanumeric characters includes a first boundary register for storing the numerical value of a boundary defining the beginning of a row line of characters to be displayed on the CRT. A second boundary register stores a numerical value representing the end of the row line. A first position control counter designates the position of a character in the row line direction. A boundary detector compares the numerical value of the second boundary register with the numerical value of the first position control counter. When the result of the comparison shows that the first position control counter value is larger than the second boundary register, a check pulse is initiated which is employed to reset the counters and initiate a new line of characters on the CRT.
In a cathode ray tube display device of the type for serially displaying the output of a data processor on a cathode ray tube and including means for converting said output into a sequence of language characters, the improvement coupled to said converting means comprising: a first boundary register for storing a numerical value of a coordinate position on the cathode ray tube defining the beginning of a row line of characters; a second boundary register for storing a numerical coordinate position representative of the end of the row line; a position control counter for designating the coordinate position of the character being displayed on the cathode ray tube in the row line direction; a boundary detector coupled to said position control counter and said second boundary register for comparing the coordinate values therebetween and initiating a signal upon an indication that the value in the position control counter is larger than the second boundary register; and means responsive to said signal to initiate the beginning of a new line of characters on the cathode ray tube face at said first boundary and at a new vertical coordinate position.
Claim 2
Dependent Claim
189 words
In a cathode ray tube display device of the type for serially displaying the output of a data processor on a cathode ray tube and including means for converting said output into a sequence of language characters, the improvement coupled to said converting means comprising: a first boundary register for storing a numerical value of a coordinate position on the cathode ray tube defining the beginning of a row line of characters; a second boundary register for storing a numerical coordinate position representative of the end of the row line; a position control counter for designating the coordinate position of the character being displayed on the cathode ray tube in the row line direction; a boundary detector coupled to said position control counter and said second boundary register for comparing the coordinate values therebetween and initiating a signal upon an indication that the value in the position control counter is larger than the second boundary register; and means responsive to said signal to initiate the beginning of a new line of characters on the cathode ray tube face at said first boundary and at a new vertical coordinate position.