H.W: 1) What is the difference between a direct and an indirect address instruction? How many references to memory are needed for each type of instruction to bring an operand into a processor register (DR)? Specify them. 2) Specify a sequence of micro-operations that will perform the following operations in the bus system of basic computer: a- IRM[PC] b- ACE AC + TR C- DR DR + AC 3) What are the two instructions needed in the basic computer in order to set the E f/f to 1