ACE Test-4(GCO-2)

Question

S1 : Hardwired control unit is faster then micro-programmed control unit

S2: Number if control bit required in the horizontal micro-programmed control unit is $logN$ bit for ‘N’ number of control signals.

S3 : Base register addressing mode is used for program relocation.

S4: PC relative addressing mode is used for reducing the opcode size of the instruction.

S5: Memory indirect addressing mode instruction execution requires less number of clock cycles then register indirect addressing mode instruction execution.

Comments

S4 is true how??

Answer 1

In the horizontal control unit, there must be a one-bit per signal.

PC relative addressing mode reduces the instruction size, not the opcode.

Memory indirect mode you have to access memory two times so it required more clock cycle.

so S1 and S3 are True