Chase H.Q.: Routine at 858C

858C: Pre-game radio screen ("CHASE HQ MONITORING SYSTEM")

Used by the routine at main_loop.
run_pregame_screen	858C	LD HL,$5D1D	Address of setup_game_data
	858F	CALL setup_game	Call setup_game
	8592	LD A,$F8	Set var_a220 to $F8 (TBD)
	8594	LD ($A220),A	Set var_a220 to $F8 (TBD)
	8597	CALL setup_transition	Call setup_transition
	859A	CALL clear_screen_set_attrs	Call clear_screen_set_attrs
	859D	XOR A	Reset car revealing height counter in reveal_perp_car
	859E	LD ($85EB),A	Reset car revealing height counter in reveal_perp_car
	85A1	DEC A	Set chatter priority to $FF
	85A2	LD HL,($5D04)	Load Nancy's report for this level
	85A5	CALL chatter	Call chatter (priority $FF)
This entry point is used by the routine at 85DD.
rps_loop	85A8	CALL draw_pregame	Call draw_pregame
	85AB	CALL drive_chatter	Call drive_chatter
	85AE	CALL reveal_perp_car	Call reveal_perp_car
	85B1	CALL animate_meters	Call animate_meters
	85B4	CALL transition	Call transition
	85B7	CALL draw_screen	Call draw_screen
	85BA	LD A,($A231)	Loop if transition_control is non-zero
	85BD	AND A
	85BE	JR NZ,rps_loop
	85C0	LD A,($963D)	Return if chatter_state is zero (idle)
	85C3	AND A
	85C4	RET Z
	85C5	CP $03	Jump to rps_xxx if chatter_state >= 3 (stopping)
	85C7	JR NC,rps_xxx	Jump to rps_xxx if chatter_state >= 3 (stopping)
	85C9	CALL keyscan	Call keyscan
	85CC	AND $10	Loop until fire is hit
	85CE	JR Z,rps_loop	Loop until fire is hit
	85D0	CALL drive_chatter_stop	Call drive_chatter_stop
	85D3	JP play_start_noise	Exit via play_start_noise
rps_xxx	85D6	LD A,$08
	85D8	CALL NC,setup_transition	If no carry call setup_transition
	85DB	JR rps_loop	Loop