中央處理器架構：练习题

• a.

  It is a register that holds the actual data or instruction being fetched from memory.

• b.

  It stores the operating system permanently so it is not lost when power is turned off.

• c.

  It provides extremely fast access to frequently used data and instructions to improve processing speed.

• d.

  It coordinates the signals between the ALU and the various input/output devices.

• a.

  To hold the memory location address of the next instruction or data to be accessed.

• b.

  To keep track of the total number of cycles the CPU has completed.

• c.

  To hold the actual instruction bits that have just been downloaded from RAM.

• d.

  To store the results of logic operations performed by the ALU.

• a.Addresses are used only during the Fetch stage, while data is used only during the Execute stage.
• b.Addresses are stored in the ALU, while data is exclusively stored in the Control Unit.
• c.An address identifies a specific location in memory, whereas data is the actual information stored at a location.
• d.An address is always stored in binary, while data is always stored in hexadecimal.

• a.

  It decodes instructions and sends control signals to manage the flow of data within the CPU.

• b.

  It stores the memory address of the next instruction to be processed.

• c.

  It acts as high-speed temporary storage for data frequently used by the CPU.

• d.

  It performs all mathematical calculations and logical comparisons.

• a.Accumulator
• b.Memory Data Register (MDR)
• c.Memory Address Register (MAR)
• d.Program Counter

先自己写一遍答案，再对照解题步骤。

先自己写一遍答案，再对照解题步骤。