An apparatus for positioning of a symbol display device on the door element of a casing of a coin actuated entertainment automat. The associative memory stores a plurality of entries in accordance with a low order virtual address component issued by the CPU’s processor when access to a given page in main memory is sought. Thus these Janus dendrimers are heterobifunctional in character and use unique ligation chemistry with single site functional dendrons, di-dendrons and multi-dendrons. The reader 118 provides an address signal at the period of frequency-divided clock signal 144 for the waveform memory 120 and reads the pattern data from the waveform memory 120 into the DAC 130. Also disclosed is a method for reducing the undesirable side effects of free radicals in a mammal by administering to a mammal in need of such antioxidants an effective amount of liposomes containing at least two antioxidants.