Chase H.Q.: Routine at B4CC

B4CC: Start the chase

This starts the animation to put the cherry light on the roof of the hero car, enables flashing lights and the smash bar, shows the "SIGHTING OF..." message and starts the siren. It also resets the hand animation's step and delay and sets hand_flag to make it run, resets the time limit to 15 sixteenths, a BCD 60 seconds, and toggles the marquee's left light. Used by the routine at perp_behaviour.
start_chase	B4CC	XOR A	Self modify 'LD C' @ ahc_hand_flag_one to load 0
	B4CD	LD ($B477),A	Self modify 'LD C' @ ahc_hand_flag_one to load 0
Starts the animation that puts the cherry light on the roof
	B4D0	INC A	Set hand_flag to 1
	B4D1	LD ($A22F),A	Set hand_flag to 1
Enable flashing lights and smash bar
	B4D4	LD ($A22E),A	Set sighted_flag to 1
This is animation frame related?
	B4D7	INC A	Self modify 'LD A' @ B478 to load 2
	B4D8	LD ($B479),A	Self modify 'LD A' @ B478 to load 2
	B4DB	LD HL,$600F	Set time_sixteenths to 15 and time_bcd to $60
	B4DE	LD ($A17D),HL	Set time_sixteenths to 15 and time_bcd to $60
	B4E1	LD HL,$5820	Toggle the left light's brightness
	B4E4	CALL toggle_light_brightness	Toggle the left light's brightness
	B4E7	LD HL,$8CB2	Show the "SIGHTING OF TARGET VEHICLE" message
	B4EA	CALL setup_overlay_messages	Show the "SIGHTING OF TARGET VEHICLE" message
	B4ED	JP start_siren_hook	Exit via start_siren_hook