1.2 memory

1.2 memory

1. the difference between rom and ram , rom is a non volatile storage and does not require a constant source of power to retain information stored on it.. Ram chip is volatile and requires a constant source of power to retain info

   • processor-performs calculations in the computer - executes instructions.
     • MAR-(the memory data register ) or memory buffer register (MDR) is the register of computers control unit that contains the data to be stored in the computer storage (e.g. ram).
     • accumlator is a register is in which intermediate arthmetic and logic results are stored

2. CIR- the cir is the current instruction register. this hold the instructions that has been fetched from main memory and its about to be executed

   • MAIN MEMORY -is the area in a computer in witch data is stored for quick access by the computers processor. The terms random (RAM) and memory are often as synonyms for primary or storage
     • ADDRESS BUS - is a computer bus architecture used to transfer data between devices that are identified by the hardware address of the physical memory (the physical address

3. internal data bus- connects all the internal components of a computer such as cpu and memory to the motherboard internal