System for Efficiently Using Spare Memory Components for Defect Corrections Employing Content-Addressable Memory
Original Publication Date: 1985-Nov-01
Included in the Prior Art Database: 2005-Feb-19
In electronic memory systems, to compensate for component defects or errors in operation, various practices have been used, including the use of spare or redundant components and the use of error-correcting codes. It is important to use these spare components and other hardware efficiently. Although content-addressable memory (CAM) structures have been proposed previously as part of the mechanism to control the use of spare components, the plan described herein accomplishes the task with superior efficiency as far as the amount of CAM capacity and quantity of spare components is required. Fig. 1 shows one form of CAM organization. The comparand 1 is "ANDed" with the mask 2 and compared with the search words 3.