Spellbound (48k): Routine at 30129

30129: Draw lift doors if Magic Knight is at lift entrance on a different floor to the lift

Used by the routine at 28092.
30129	LD A,(65529)	Load Magic Knight's current room into A
30132	DEC A	If room number is not a multiple of 8...
30133	AND 7	...(i.e. not a room from which the lift can be called)...
30135	RET NZ	...then return
30136	LD A,(65529)	Load Magic Knight's current room into A...
30139	ADD A,A	...double it...
30140	LD C,A	...and copy into BC...
30141	LD B,0	...
30143	LD HL,41711	Point HL at room connectivity data table
30146	ADD HL,BC	Add BC as offset
30147	LD A,(HL)	Load index of room to left of current room...
30148	CP 255	...and if this is not set to 255 (i.e. the lift is here)...
30150	RET NZ	...then return...
30151	LD A,69	...otherwise store 69 (cyan INK, black PAPER, BRIGHT) at 23695...
30153	LD (23695),A	...
30156	LD A,224	Set terrain interaction parameter (impassable-horizontally, impassable-vertically, and preserve-attribute)...
30158	LD (23483),A	...
30161	LD BC,3584	Set coordinates and...
30164	LD A,83	...draw a graphic #83 (lift doors)
30166	CALL 29960	...
30169	RET	Return