8. 1 Background ●●● ●●●● ●●●●● ●●●● o a pair of base and limit ●●0●● ▲鱼 0 registers define the operating address space system o The base register hold 256000 the smallest legal process physical memory 300040 address 300040 base ● The limit register process specifies the size of the 420940 120900 range limit o The cPu hardware process compare every address 880000 generated in user mode with the registers 10240008 8.1 Background ⚫ A pair of base and limit registers define the address space ⚫ The base register hold the smallest legal physical memory address ⚫ The limit register specifies the size of the range ⚫ The CPU hardware compare every address generated in user mode with the registers