4-buffer muxing display prototypes

4Int:
	pop	de		;FOV, shadows
	ld	a,e
	xor	d
	and	c
	xor	d
	pop	de		;walls, entities
	or	d
	or	e
	out	($11),a		;55 cycles


4Int:
	pop	de		;FOV, shadows
	ld	a,e
	xor	d
	and	%00000000
	xor	d
	pop	de		;walls, entities
	or	d
	or	e
	out	($11),a		;58 cycles


3Int1Ext:
	pop	de		;shadows, walls
	ld	a,(hl)		;FOV
	xor	e
	and	c
	xor	e
	or	d
	pop	de		;entities, next shadows
	or	e
	out	($11),a		;58 cycles
	inc	l
	ld	a,(hl)
	inc	hl
	xor	d
	and	c
	xor	d
	pop	de		;walls, entities
	or	e
	or	d
	out	($11),a		;58 cycles


2Int2Int:
	pop	de		;shadows, walls
	ld	a,(hl)		;FOV
	inc	l
	xor	e
	and	c
	xor	e
	or	(hl)		;entities
	inc	hl
	or	d
	out	($11),a		;61 cycles


2Int2Ext:
	pop	de		;shadows, walls
	ld	a,(hl)		;FOV
	xor	e
	and	c
	xor	e
	inc	h
	inc	h
	inc	h
	or	(hl)		;entities
	inc	hl
	or	d
	out	($11),a		;69 cycles
	pop	de		;shadows, walls
	ld	b,(hl)		;entities
	dec	h
	dec	h
	dec	h
	ld	a,(hl)		;FOV
	inc	l
	xor	e
	and	c
	xor	e
	or	b
	or	d
	out	($11),a		;71 cycles


2Int2Ext:
	pop	de		;shadows, walls
	ld	a,(hl)		;FOV
	xor	e
	and	c
	xor	e
	or	d
	ld	d,h
	inc	h
	inc	h
	inc	h
	or	(hl)		;entities
	ld	h,d
	inc	hl
	out	($11),a		;77 cycles