The CPU

It is the job of the ​ (a)   to decode instructions and manage other parts of the computer system.

• CU
• ALU
• MDR
• MAR
• PC
• ACC

While running computers continually perform the ​ (a)   , ​ (b)   , ​ (c)   cycle.

• FETCH
• DECODE
• EXECUTE
• COLLECT
• INTERPRET
• COMMIT
• RUN
• DECYPHER
• DEDICATED

​ (a)   are ​ (b)   , but super fast pieces of memory located in the ​ (c)   .

• Registers
• CPU
• small
• large
• hard drive
• Circuits
• Embedded Systems
• RAM

Categorise these computer components:

Groups:

(a) Register

,

(b) Circuit

,

(c) Made Up

• PDR

• MAR

• CU

• ALU

• MDR

• PC

• ACC

• CSR

In terms of registers, the PC is short for:

Match these acronyms with their meaning.

• Control Unit

• Memory Address Register

• MDR

• Program Counter

• ALU

• Arithmetic Logic Unit

• PC

• CU

• MAR

• Memory Data Register

Operations such as addition are carried out in the:

• ALU

• ACC

• MDR

• CU

Match these registers with their role.

• MDR

• Not a register

• ACC

• Stores the location in memory where data is being fetched from OR being written to.

• MAR

• Stores data / instructions just fetched from memory OR about to be written to memory.

• ALU

• Stores the result of instructions such as addition.

• PC

• Stores the location of the next instruction to be fetched.

Put these actions in order:

• The instruction is carried out.

• The instruction is fetched from memory.

• The result of the instruction is stored in the ACC or back in memory.

• The instruction is decoded to determine how to carry it out.

A CPU with a higher Clock Speed, will be able to carry out more FDE cycles per second.

• TRUE

• FALSE