CPU
Lesson Instructions
Watch and follow the video, the lesson contains three parts:
Key Information and content - all you need to do here is watch and listen
Learning activity - this activity is a labelling and explaining the different CPU components and registers
Consolidation - these are past exam question and are for deliberate practice to check your understanding.
CPU Von Neumann Full Lesson.mp4Task - Label the CPU
Task - Exam Questions - Deliberate Practice
Mark Scheme
Question 1
Any one point:
To carry out the processing on the computer
To fetch and execute instructions
"control" the computer is too vague
Question 2
1 mark per bullet to max 2 per register
MAR / Memory Address Register
Stores the address / location where data will be read/written/accessed/fetched
MDR / Memory Data Register
Stores the data/instruction that is fetched/read from memory
Program Counter
Stores the address/location of the next instruction to be run
Accumulator
Stores the result of manipulation / process / calculation
CIR / Current Instruction Register
Stores the instruction currently being processed
Question 3
1 mark for each
An instruction is fetched from memory
The instruction is then decoded
The decoded instruction is then executed so that the CPU performs continuously
The process is repeated
The program counter is incremented
The instruction is transferred to the MDR
The address of the instruction to be fetched is placed in the MAR