04190835 is referenced by 34 patents and cites 3 patents.

An editing display system using a CRT display, with variable margin and tabulation facilities. Dual cursors are provided on the display: the first indicating the row and column in the display selected by the user, the second "shadow" cursor appearing in the same column but on the rule indice line of the display. The dual cursor function is implemented by providing a random access memory which is partitioned into data sets in which the first character represents the location of a cursor on a given line, and the remaining characters identify the actual characters on that line. Direct memory access including fixed format information is used for transferring the data in memory to a shift register in the video control portion of the system.

Title
Editing display system with dual cursors
Application Number
725642
Publication Number
4190835
Application Date
December 5, 1977
Publication Date
February 26, 1980
Inventor
William J Buynak
Bayville
NY, US
Agent
James J Cannon Jr
Thomas A Briody
Assignee
U S Philips Corporation
NY, US
IPC
G06F 3/14
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