CPU

 

• IAS:

(Immediate Access Store)

Volatile main memory bank for efficient fetching of data and instructions.

• ALU:

(Arithmetic Logic Unit.) 

Two parts: [Arithmetic] Evaluating numbers; 

                  [Logic] Evaluating data and comparisons.

• PC:

(Program Counter)

• CIR:

(Current Instruction Register)

• MDR/MBR:

(Memory Data Register/ Memory Buffer Register.)

• MAR:

(Memory Address Register.)

• Control Unit:

Monitoring transfer of data in the computer system. 

This is acts using the clock to maintain a steady rate.

• The Clock:

Produces pulses [ 1,000,000,000 times a second] 

• Internal Bus:

System of wires forming a pathway for the movement of data within the CPU.

[3 types of BUSES:]

• Data bus: carries data
• Address bus: finds specific data 
• Control: determines whether data is read or written to a data location.

• Accumulator:

Temporary storage for calculations.