Spellbound (48k): Routine at 38124

38124: Play hiss-type sound

Used by the routines at 38725 and 38749.
38124	CALL 38212
38127	EX AF,AF'
38128	LD H,0
38130	LD BC,128
38133	EX AF,AF'
38134	OUT (254),A
38136	XOR 16
38138	EX AF,AF'
38139	LD L,0
38141	LD D,L
38142	LD E,H
38143	AND A
38144	SBC HL,DE
38146	SBC HL,DE
38148	LD DE,254
38151	ADD HL,DE
38152	LD A,L
38153	SUB H
38154	JR C,38157
38156	DEC A
38157	LD H,A
38158	DEC A
38159	JR NZ,38158
38161	DEC BC
38162	LD A,B
38163	OR C
38164	JR NZ,38133
38166	RET