A modular dock unit and system for making large modular dock systems is disclosed. The moderator’s computer receives image data from the computers, and generates synthesized image data therefrom, which is transmitted to the projector for display of the synthesized image. The apparatus is effective in removing loose particles from the surface of the conditioning disc such that the possibility of any such particles causing scratches on a wafer surface during a subsequently conducted chemical mechanical polishing process is eliminated. The receiving device then compares an originating phone number in the caller ID data against phone numbers in the set of facsimile processing rules. A phase comparator 11 detects the phase difference between the modulation clock signal CLKN and a divided inner clock signal CLKM. Cache coherency is maintained, and data move and compare operations may be performed efficiently on cached data.