FDE Terminology

3. purpose is to transmit command, timing and specific status information between system components
4. holds the address of the current instruction that is to be fetched from memory, or the address in memory to which data is to be transferred.
6. the sequence of operations involved in executing an instruction
8. provides a bi-directional path for moving data and instructions between system components
10. holds the address of the next instruction to be executed
12. has a number of components that allows it to carry out its task of executing instructions (control unit,buses,ALU,dedicated registers)
14. memory cells that operate at high speeds

1. performs arithmetic and logical operations on the data
2. controls and coordinates the activities of the cpu
5. transmits the memory addresses of words that are used as operands in program instructions, so that data can be retrieved and sent back to the processor
7. the collective name for the data bus, address bus and control bus
9. holds the data being processed and the results of processing
11. holds the instruction that is currently being decoded and executed.
13. holds the contents found at the address held in the MAR, or data which is to be transferred to main memory