Martianoids: Routine at BB86

BB86: Start Game Sequence

Used by the routine at GameMenu. Runs when the key to start the game is pressed. Lights are started around the frame of the screen, and when they have all finished the tune that starts the game is played and the game screen is drawn.
StartGameSequence	BB86	LD B,$08	There are eight lights to start.
StartGameSequence_Light	BB88	PUSH BC	Save the counter.
	BB89	CALL DisplayMenu	Draw the menu using DisplayMenu.
	BB8C	LD A,$01	Start a new light using MoveLights.
	BB8E	CALL MoveLights	Start a new light using MoveLights.
	BB91	POP BC	Restore the counter.
	BB92	DJNZ StartGameSequence_Light	Loop back until all eight lights have been started.
	BB94	CALL DisplayMenu	Draw the menu using DisplayMenu.
StartGameSequence_Wait	BB97	LD IY,($9613)	Restore IY, which the ROM interrupt routine needs.
	BB9B	EI	Enable interrupts...
	BB9C	HALT	...and wait for the next one.
	BB9D	DI	Disable interrupts again.
	BB9E	XOR A	Move the lights without starting a new one, using MoveLights.
	BB9F	CALL MoveLights
	BBA2	JR NZ,StartGameSequence_Wait	Loop back until all of the lights have finished.
	BBA4	LD DE,$C289	Point DE at StartGameTune.
	BBA7	CALL PlayMusic	Play it using PlayMusic.