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Description
Flashcards by Anneka de Leon, updated more than 1 year ago
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Created by Anneka de Leon
over 8 years ago
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| Question | Answer |
| What is the function of the Memory Unit? | The memory unit holds the data and the program that is processing that data. It is also known as RAM. |
| What is the function of the Control Unit? | The Control Unit manages movement of data into and out of memory. It is a sequential processing machine, allowing only one program instruction to be executed at a time. |
| The Von Neumann Architecture allows a person to interact with the machine. What happens when a user enters a command? | The values passed to and forth are stored in an internal memory location called a 'register.' |
| What is meant by 'ALU' and what are its functions? | ALU stands for the Arithmetic Logic Unit in the Central Processing Unit. It carries out mathematical calculations and data comparisons. |
| What are 'buses'? | A bus is where information passes through between components. An address bus identifies memory locations. A data bus moves data. |
| What does a Program Counter do? | A Program Counter holds the address of the next program instruction. |
| What does an Instruction Register do? | An Instruction Register holds the current program instruction to be executed. |
| What is the function of an MAR? | The Memory Address Register holds the memory location (address) of the next data/program instruction to be fetched. |
| What is the function of the MDR? | The Memory Data Register acts as a buffer to temporarily store data/a program instruction when its destination register it too busy to receive it. Sometimes called a Memory Buffer Register (MBR). |
| What is an MPR? | A Multipurpose Register is a temporary store for data that can be used any time when the current program instruction needs it. |
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