Answer to Question #260130 in Electrical Engineering for fal

Question

Q) Find the values of the flags (carry ,sign ,zero, overflow) of the processor status register for the given example of two 16 bit no’s in Hex (ABCD + 5678) and draw the circuit diagram also

Answer 1

PC (Program Counter) – It holds the address in Memory of the next program Instruction and It is not directly connected to memory but via MAR.

IR (Instruction Register) – It is used to hold the instruction that is currently being executed.Contents of IR are available in control unit which generates the timing signals that controld processing elements in executing instructions. It has 2 parts IR(Opcode) & IR(Address)

MAR (Memory Address Register): It is used to store the address to access the memory and the stored address of the memory to or from which data is to be transferred.

MBR(Memory Buffer Register):It stores the information that is being send to or received from the memory along with the bi-directional data bus.