Chase H.Q.: Routine at F2FA

F2FA: Plays turbo effect, exits via engine effect.


play_turbo_sfx_128k	F2FA	LD A,($A23A)	Jump if turbo_sfx_enabled is zero
	F2FD	AND A
	F2FE	JR Z,engine_sfx_from_speed_128k
	F300	DEC A	Decrement noise pitch
	F301	RET Z	Return if zero
	F302	LD HL,$A219	Address of noise pitch register soft copy
	F305	DEC (HL)	Decrement in-place
	F306	JR Z,ses_1	Jump if zero
	F308	LD A,(HL)	Increment noise pitch register soft copy by 10
	F309	ADD A,$0A
	F30B	LD L,A
	F30C	LD H,$00
	F30E	LD ($A217),HL	Set channel C pitch (both fine and coarse)
	F311	LD A,($A21A)	Set mixer to enable tone C and noise C
	F314	AND $1B
	F316	LD ($A21A),A
	F319	LD A,$0D	Set channel C volume to 13
	F31B	LD ($A21D),A	Set channel C volume to 13
	F31E	RET	Return
ses_1	F31F	LD A,($A21A)	Set mixer to disable tone C and noise C
	F322	OR $24
	F324	LD ($A21A),A
	F327	XOR A	turbo_sfx_enabled = 0
	F328	LD ($A23A),A	turbo_sfx_enabled = 0
	F32B	JP load_stage_3	Exit via engine_sfx_from_speed_128k