A method of creating a layout of a set of masks including an alternating phase shifting mask and a halftone phase shifting trim mask is provided. Embodiments of the invention pertain to a register cache writeback algorithm for storing writeback data to a register cache if register file write ports or space is unavailable. The operating device has a base portion, a toggle portion, a button portion, three electrical contact switches, and a clicking mechanism. Upon the relative displacement of the construction parts, this field component extends at different angles to the magnetoresistive element and is so large that the magnetoresistive element is always magnetically saturated during the displacement.