What is the purpose of the flag register?

The FLAGS register is the status register that contains the current state of a CPU. The size and meanings of the flag bits are architecture dependent. It usually reflects the result of arithmetic operations as well as information about restrictions placed on the CPU operation at the current time.

What are two advantages of registers?

Advantages of Register variable: – Access optimization and speed of program execution: The operations of these variables are faster by orders of magnitude. – It is useful when you want to refer a variable frequently. – It allocates fast memory in the form of a register. – It helps to speed up program execution.

What is the function of flag in microprocessor?

The Flag register is a Special Purpose Register which shows the status of the task. This is an 8-bit register but the only 5bit is used for the operation. The flag becomes set or reset after arithmetic and logical operation.

Why are flags needed in microprocessors?

Flags are crucial for decision-making in microprocessors. A microprocessor is an integrated circuit that can be programmed to process data and send messages and directions to other electronic systems. Flags are an important component of microprocessors as they register the outcomes of calculations and actions.

What are the advantages and disadvantages of three address instruction?

The advantage of the three-address format is that it results in short programs when evaluating arithmetic expressions. The disadvantage is that the binary-coded instructions require too many bits to specify three addresses. An example of a commercial computer that uses three-address instructions is the Cyber 170.

What are the advantages and disadvantages of cache memory?

It is faster than the main memory. The access time is quite less in comparison to the main memory. The speed of accessing data increases hence, the CPU works faster. Moreover, the performance of the CPU also becomes better.

What are the uses of flags in microprocessor?

They are the main features of computer processing systems. Flags are an important component of microprocessors as they register the outcomes of calculations and actions.