0 votes 0 votes While designing the control units, the storage of control function code in a ROM is required in A) Hardwired control unit. B) Horizontal microprogrammed control unit. C) Vertical micro programmed control unit. D) Both (B) & (C). nandini gupta asked Jan 15, 2017 nandini gupta 196 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.