The purpose of this exercise is to create finite state machine (fsm) which can detect a

certain eight digit binary sequence in a continuous serial binary input stream. when the

correct sequence is detected, the single output signal should be a logical true value, in all

other cases it should be a logical false. this exercise is designed to allow a gradual

transition from strictly combinational circuits to a simple sequential circuit. note that this

lab assignment is a group assignment with each group having 2 students.

problem statement: the "gottcha anti-theft" machine

there are many anti-theft devices on the market that attempt to foil a would-be robber

from starting your car and driving off with it. one popular item has a keypad like a touchtone

telephone. in order to start your car, you must key in a secret four digit decimal

code, such as '3719'. it only "remembers" the most recent four digits you have keyed in.

thus the sequence '3723719' will let you start your car.