Design Method - BJACK

Developing a bubble diagram is the first step in describing a state machine. The BJACK state diagram indicates the state transitions and the conditions that cause those transitions. There is a one-to-one correlation between the bubble diagram and the state diagram described in the source file. The following table describes the state identifiers (state machine states) illustrated in the bubble diagram and listed in the source file:

	State Identifier	Description
	Clear	Clear the state machine, adder, and displays.
	ShowHit	Indicate that another card is needed. Light the HIT indicator.
	AddCard	Add the adder input to the current count.
	Add10	Add 10 to the current count, giving an ace a value of 11.
	Wait	Wait until a card is taken from the reader.
	Test17	Test the current count for a value less than 17.
	Test22	Test the current count for a value less than 22.
	Sub10	Add -10 to the count, restoring an ace to 1.
	ShowBust	Indicate no more cards are needed. Light the BUST indicator.
	ShowStand	Indicate no more cards are needed. Hit and BUST are not lit.