Clocks and Buses

content/sixth/CompSci/Theory/Assembly/TheStoredProgramConcept.md

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 - The CPU decodes the instruction (works out what it is supposed to do and gathers any required data)
 - The CPU then executes the instruction on the data (performs that operation)
 
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+### Buses
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+- The buses provide a pathway for instructions and data to be moved between the CPU and RAM
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+#### Control bus
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+- Are we trying to read from or write to RAM
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+#### Address bus
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+- This carries the address in the RAM that is to be read from or written to
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+##### Data bus
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+- The piece of data that is read from or is to be written from the RAM
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+### Clock
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+- The metronome that synchronises all the operations in the processor
+- When we talk about "clock speed" this is what we mean
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+- Operations in the processor start on the tick of the click and must be finished before the next tick happens
+- This is one of the biggest barriers to faster processors
+- Clock speeds are so high (4GHz+) that the electrical signals that pass between components don't have time to propagate from one side of the processor to the other
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