Disp4Lvl:
	ld	hl,appBackUpScreen
	ld	de,plotSScreen
	push	hl
	ld	a,$07
	out	($10),a			;?? cc into
	ld	a,%11011011
	or	a
	ld	hl,flags+asm_flag2
	inc	(hl)
	jr	z,__Disp4Lvlskip
	rra
	ld	b,(hl)
	inc	b
	jr	z,__Disp4Lvlskip
	rra
	ld	(hl),-2
__Disp4LvlSkip:
	ex	af,af'
	pop	hl
	ld	a,$80
__Disp4LvlEntry:
	out	($10),a			;76+cc into, 71cc loop
	push	af
	ex	(sp),hl			;waste
	ex	(sp),hl			;waste
	nop				;waste
	ld	a,$20
	out	($10),a			;71cc into
	ld	b,12
__Disp4LvlLoop:
	ex	af,af'
	rra
	ld	c,a
	ex	af,af'
	ld	a,(de)
	xor	(hl)
	and	c
	xor	(hl)
	inc	de
	inc	hl
	out	($11),a			;71cc into, 77cc loop
	djnz	__Disp4LvlLoop
	inc	bc			;waste
	ex	af,af'
	rra
	ex	af,af'
	pop	af
	inc	a
	bit	6,a
	jr	z,__Disp4LvlEntry
__Disp4LvlDone:
	ld	a,$05
	out	($10),a			;73cc into
	ret