Computer Systems (Computer Structure)

Central Processing Unit

Fetch, Decode and Execute Information from the RAM Perform Arithmetic Calculation Perform Logical Operations Control Read, Write, Clock, Interrupt and Reset Lines

ALU Registers Control Unit

Arithmetic Logic Unit

Performs all Calculations Performs Comparisons on Numeric Values Makes Decisions Based on Logic (AND, OR, NOT)

Temporary Storage Locations within the Processor Stores Addresses, Data or Instructions

Control Read, Write, Clock, Interrupt and Reset Lines

The Clock Speed is a measure of how quickly a CPU can handle and complete tasks. It is measured in Hertz (Hz)

Random Access Memory

The RAM is a temporary storage location for data until it is needed by the CPU

Data held in RAM is deleted

Data Bus Address Bus

The Address Bus holds the address in RAM that the processor is accessing. It only goes from the CPU to the RAM

The data bus carries data between the processor and the memory. It goes in both directions, to the CPU and from the CPU

Compiler Interpreter

You can run your can without it being finished Easy to find errors because Interpreters stop at the line with an error

Code has to be translated each time it is run Users need to have the translator program running

Code only has to be translated once Users don’t need to have the translator program running

Users have to wait until the whole program is perfect before they can run it Users have to re-translate the whole program if they want to make a change