1.2 Processor Registers(3/4) Control and status registers Function: are used to control the operation of the processor Most are not visible to the user Some may be accessibly by machine nstruction in control or system mode1.2 Processor Registers(3/4) • Control and Status Registers • Function：are used to control the operation of the processor • Most are not visible to the user. • Some may be accessibly by machine instruction in control or system mode 10