1.2 Processor Registers (4/4) Control and status registers Program Counter(PC) Contains the address of an instruction to be fetched Instruction Register(Ir Contains the instruction most recently fetched Program Status Word(PSW) Condition codes [more detail next Other state-related bits such as. Interrupt enable/disable Supervisor/user mode1.2 Processor Registers(4/4) • Control and Status Registers • Program Counter (PC) • Contains the address of an instruction to be fetched • Instruction Register (IR) • Contains the instruction most recently fetched • Program Status Word (PSW) • Condition codes [more detail next] • Other state-related bits, such as: • Interrupt enable/disable • Supervisor/user mode • … … 11