1.1:Architecture

1.1:Architecture

1. Processor

   • CPU
     • central processing unit
   • Controls and does jobs such as fetch execute and process instructions
   • There are types of speeds for processor that are classed with MHz, Hz, GHz
   • cores
     • cores come in different numbers like double core, quad core, and 8 core
     • this is where instructions are Fetched, Executed and Decoded

2. Cache

   • Is very small but it is very fast and is very efficient
   • it holds commonly used instructions
   • increasing cache size and also decreasing memory to disk transfer can make the process of instructions faster
   • If there is more cache there is more instructions carried out simultaneously

3. embedded system

   • usually used for special tasks or jobs
   • this one does not contain any operating system
   • made up of hardware and also software
     • example is a dishwasher
   • Computer system that operates and is permanently built in the computer

4. Buses

   • Adress bus
     • Data Bus
       • Internal data buses are also referred to as a local bus, because they are intended to connect to local devices.
     • An address bus is a computer bus architecture used to transfer data between devices that are identified by the hardware address of the physical memory
   • Control Bus
     • A control bus is a computer bus that is used by the CPU to communicate with devices that are contained within the computer

5. Register

   • CIR
     • Current Instruction Register
     • The instructions stored in the MDR are copied here
   • MAR
     • The Location of the next instruction is copied here and transferred along the Address Bus
     • Memory Address Register
   • MDR
     • Once Data/instructions are brought from the Memory Address in Main Memory - they are placed in the MDR
     • Memory Data Register

6. Accumalator

   • rest of calculations are placed here

7. Secondary storage

   • Used for long term storage of data and instructions
   • E.G.:Hard disk drive, Flash memory, solid state