Registers

Registers are ‘special’ memory locations in a processor

• Much faster than memory access
  • Close to the CPU
• Doesn’t require as many bits to address
  • Not all machine instructions can reference the entire address space without using multiple words
• Few register (as few as 4) however modern computers may have many Kilobytes
• All computation is done on registers rather than RAM
• The HACK computer has two registers
  • A - Address Register
  • D - Data Register