A digital system has three registers AR, BR, PR. Three flip flops provide the control variables for the system: S is a flipflop that is set by an external Start signal to start theoperation, and F and R are two flip flops used in sequencing the micro-operations when the system is in operation. A fourth flipflop D is set by the when the operation is completed. The operation of the digital system is described by the following registertransfer statements:
S: PRß0,Sß0,Fß1,Dß0
F:Fß0, if (AR R: PRßPR+1,ARß AR-BR,Rß0,Fß1
(a) What is the function that the system performs?
(b) Draw a blockdiagram of the hardware implementation. Include a Start input to set flip flop S and Done output signal from flip flop D