CPU Registers

What is the purpose of the Registers in the CPU.

• Registers are very fast memory located within the CPU to store temporary program data.

• A Register is fast memory that stores currently running programs

• Registers are non volatile memory.

Why are registers, rather than RAM is used within the CPU.

• RAM is not volatile so it doesn't lose data when powered off

• Registers can store much more data than RAM.

• It is much faster to shift data between the Registers and CPU than the RAM and CPU.

• Registers stink

What is the purpose of an instruction set

• An instruction set is a set of instructions that the CPU uses to carry out instructions.

• An instruction set is the way the operating system knows what programs to open.

What is the purpose of assembly language.

• Assembly language is a programming language which is made up of hexadecimal characters.

• Assembly language is a programming language close to machine code, although, programmers can understand it.

• Assembly language is basically Mandarin Chinese.

• Assembly language is machine code.

Why was the Little Man Computer developed.

• The LMC was developed for complex programming

• The LMC is a simplified instruction set, which was developed specifically for educational purposes.

• The LMC lacks an instruction set, making it very easy to use.

What does the data bus do.

• The data bus takes instructions and data around the system.

• The data bus carries data around a network.

• The data bus plans out where data goes, and how the hardware of the computer uses it.

• The data bus isn't real

What does the address bus do.

• The address bus is required to label addresses on letters and parcels.

• The address bus is used to label each section of the computer.

• The address bus carries storage addresses of data or instructions from registers to main memory.

What does the control bus do.

• The control bus is the "brain" of the computer.

• The control bus carries signals around the system to co ordinate actions.

• The control bus allows data to travel through the system, depending on whether it is safe or harmful.

What is the purpose of the Memory Data Register

• The Memory Data Register is responsible for moving data between the RAM and Hard Drive.

• The Memory Data Register is a special register which temporarily holds addresses after being processed by the CPU.

• The Memory Data Register receives the data from Main Memory and temporarily holds it before moving it to the CPU.

• Yes

What is the purpose of the Memory Address Register

• The MAR holds currently running programs and applications.

• The MAR is responsible for holding the address of the previous instruction, which has just been processed by the CPU.

• The Memory Address Register is responsible for holding the address of the next instruction in main memory.