COMPARATOR The MWLSS address stream (COLUMN or ROW ADDRESS) is sampled to provide the input to the comparator. This feeds one input of a NOT XOR gate. The other input is a MEMORY CELL containing the pattern to be recognised. The output of the NOT XOR gate forms the set leg of a SET RESET LATCH. The reset leg is an inverted P240 gun which resets the latch at the start of each address frame. The out