Stands of CPU -

What does CPU contains?

• 1. 1. CU
     2. AU
     3. Buffers

• 1. 1. CP
     2. ALU
     3. MDR

• 1. 1. PC
     2. ALU
     3. Buses

• 1. 1. CU
     2. ALU
     3. Registers and Buses

FILL the gaps!

In the mid-1940s, John von Neumann developed
the concept of the "......." which has been the basis of computer
architecture ever since.

• single program computer

• save program computer

• store program concept

• store programming computer

Show John von Neumann's architecture features

• the CPU was able to access the memory directly

• computer memories could store programs as well as data
  

• stored programs were made up of instructions which could be executed in
  sequential order

• None of them

Stands of ALU

What is Current Instruction
Register (CIR)?

• this register stores the current instruction being decoded and executed

• this register is used when carrying out ALU
  calculations; it stores data temporarily during the
  calculations

• this register stores the address of the memory
  location currently being read from or written to

• this register stores data which has just been read
  from memory or data which is about to be written
  to memory

  
  

Fill the gaps!

......... this register stores the address of the memory
location currently being read from or written to

What is program counter (PC)?

• this register stores the current instruction being decoded and executed

• this register is used when carrying out ALU
  calculations; it stores data temporarily during the
  calculations

• this register stores the address where the next
  instruction to be read can be found

• this register stores data which has just been read
  from memory or data which is about to be written
  to memory

  
  

What is memory data/
buffer register (MDR)?

• this register stores the current instruction being decoded and executed

• this register is used when carrying out ALU
  calculations; it stores data temporarily during the
  calculations

• this register stores the address where the next
  instruction to be read can be found

• this register stores data which has just been read
  from memory or data which is about to be written
  to memory

  
  

Fill the gaps!

......... is used when carrying out ALU
calculations; it stores data temporarily during the