Abstract: An apparatus is provided for use in conjunction with a control system which can provide one or more respective output instructions and one or more corresponding respective timing instructions, the apparatus comprising a counter for providing a count sequence for substantially continuously providing a measure of elapsed time within a prescribed time interval; a storage device, responsive to a match indication, for storing multiple respective output instructions and corresponding multiple respective timing instructions and for asserting respective output instructions and corresponding respective timing instructions in order of a sequence such that upon receipt of a match indication, a next respective output instruction and a corresponding next respective timing instruction in the sequence are asserted; and a comparator for comparing each respective asserted timing instruction to the count of the count sequence and for providing the match indication upon an occurrence of a match.