Digital logic circuits for comparison of ordered tegnfoelger of variable length

摘要

Apparatus for automatically searching for a string of ordered characters stored on a magnetic tape wherein the string may be of selectable length employing a dynamic buffer register for storing the candidate strings of characters to be searched and a static/dynamic register for use in identifying the ordered reference string of characters used in performing the search, said candidate characters and reference characters being compared on a bit parallel character serial basis, means are provided to successively delay the relative positions of said reference characters and candidate characters in their respective register stages until a comparison indicates that the string of characters identified in the reference register have been located in the candidate register.