diff --git a/017.dual_playfield/Makefile b/017.dual_playfield/Makefile
new file mode 100644
index 0000000..e488a6e
--- /dev/null
+++ b/017.dual_playfield/Makefile
@@ -0,0 +1,17 @@
+MODULE=dual_playfield_mode.s
+FLOPPY=bin/dual_playfield_mode.adf
+IMAGEDATA=out/playfield1-palette.s out/playfield2-palette.s out/playfield1.bin out/playfield2.bin
+PF1_FILE=../assets/playfield1.png
+PF2_FILE=../assets/playfield2.png
+
+EXTRA=$(IMAGEDATA) init.s utils.s constants.i Makefile
+BASE_ADDRESS=10000
+
+include ../shared/base.mk
+
+$(IMAGEDATA): $(IMAGECON) $(PF1_FILE) $(PF2_FILE)
+	echo "imagecon = " $(IMAGECON)
+	$(IMAGECON) --input $(PF1_FILE) --output out/playfield1 --output-bitplanes  --output-palette-asm  --output-palette
+	$(IMAGECON) --input $(PF2_FILE) --output out/playfield2 --output-bitplanes  --output-palette-asm  --palette-offset 8 --output-palette
+
+
diff --git a/017.dual_playfield/README.md b/017.dual_playfield/README.md
new file mode 100644
index 0000000..ccd1f43
--- /dev/null
+++ b/017.dual_playfield/README.md
@@ -0,0 +1,18 @@
+dual playfield
+==============
+
+Work in progress
+
+try it
+------
+  * [Download disk image](bin/dual_playfield_mode.adf?raw=true)
+  * <a href="http://alpine9000.github.io/ScriptedAmigaEmulator/#amiga_examples/dual_playfield_mode.adf" target="_blank">Run in SAE</a>
+
+
+interlaced
+----------
+![interlaced](screenshots/laced-new.png?raw=true)
+
+non-interlaced
+--------------
+![non-interlaced](../013.dithered_ham/screenshots/dithered.png?raw=true)
diff --git a/017.dual_playfield/bin/dual_playfield_mode.adf b/017.dual_playfield/bin/dual_playfield_mode.adf
new file mode 100644
index 0000000..611b233
Binary files /dev/null and b/017.dual_playfield/bin/dual_playfield_mode.adf differ
diff --git a/017.dual_playfield/constants.i b/017.dual_playfield/constants.i
new file mode 100644
index 0000000..2f85b31
--- /dev/null
+++ b/017.dual_playfield/constants.i
@@ -0,0 +1,11 @@
+VPOSRLOFBIT		equ 15
+LVL3_INT_VECTOR		equ $6c
+SCREEN_WIDTH		equ 320
+SCREEN_HEIGHT		equ 256
+SCREEN_WIDTH_BYTES	equ (SCREEN_WIDTH/8)
+SCREEN_BIT_DEPTH	equ 1
+SCREEN_RES		equ 8 	; 8=lo resolution, 4=hi resolution
+RASTER_X_START		equ $81	; hard coded coordinates from hardware manual
+RASTER_Y_START		equ $2c
+RASTER_X_STOP		equ RASTER_X_START+SCREEN_WIDTH
+RASTER_Y_STOP		equ RASTER_Y_START+256
diff --git a/017.dual_playfield/dual_playfield_mode.s b/017.dual_playfield/dual_playfield_mode.s
new file mode 100644
index 0000000..c553969
--- /dev/null
+++ b/017.dual_playfield/dual_playfield_mode.s
@@ -0,0 +1,63 @@
+	include "../include/registers.i"
+	include "hardware/dmabits.i"
+	include "hardware/intbits.i"
+	
+	include "constants.i"
+	
+entry:
+	lea 	CUSTOM,a6	
+	bsr	init
+	bsr.s	installColorPalette
+.mainLoop:
+	bsr 	waitVerticalBlank
+
+	bra	.mainLoop
+	
+	include "init.s"
+	include "utils.s"
+
+	
+pokeBitplanePointers: 		; d0 = frame offset in bytes, a0 = BPLP copper list address
+	movem.l	d0-a6,-(sp)
+	moveq	#SCREEN_BIT_DEPTH-1,d0
+.bitplaneloop:
+	move.l 	a1,d1
+	move.w	d1,2(a0)
+	swap	d1
+	move.w  d1,6(a0)
+	lea	SCREEN_WIDTH_BYTES(a1),a1
+	addq	#8,a0
+	dbra	d0,.bitplaneloop
+	movem.l (sp)+,d0-a6
+	rts
+
+	
+installColorPalette:
+	include "out/playfield1-palette.s"
+	include "out/playfield2-palette.s"
+	rts
+	
+copper:
+	;; bitplane pointers must be first else poking addresses will be incorrect
+pf1_bitplanepointers:	
+	dc.w	BPL1PTL,0
+	dc.w	BPL1PTH,0
+pf2_bitplanepointers:	
+	dc.w	BPL2PTL,0
+	dc.w	BPL2PTH,0
+	dc.w	BPL3PTL,0
+	dc.w	BPL3PTH,0
+	dc.w	BPL4PTL,0
+	dc.w	BPL4PTH,0
+	dc.w	BPL5PTL,0
+	dc.w	BPL5PTH,0
+	dc.w	BPL6PTL,0
+	dc.w	BPL6PTH,0
+
+	dc.l	$fffffffe
+
+pf1_bitplanes:
+	incbin	"out/playfield1.bin"
+
+pf2_bitplanes:
+	incbin	"out/playfield2.bin"
\ No newline at end of file
diff --git a/017.dual_playfield/init.s b/017.dual_playfield/init.s
new file mode 100644
index 0000000..140a440
--- /dev/null
+++ b/017.dual_playfield/init.s
@@ -0,0 +1,38 @@
+	include "../include/bplconbits.i"
+	;; custom chip base globally in a6
+init:
+	movem.l	d0-a6,-(sp)
+	move	#$7ff,DMACON(a6)	; disable all dma
+	move	#$7fff,INTENA(a6) ; disable all interrupts	
+
+	;; set up default palette
+	bsr.s	installColorPalette
+
+	lea 	pf1_bitplanepointers(pc),a0
+	lea	pf1_bitplanes(pc),a1
+	bsr.s	pokeBitplanePointers
+
+	lea 	pf2_bitplanepointers(pc),a0
+	lea	pf2_bitplanes(pc),a1
+	bsr.s	pokeBitplanePointers	
+	
+	;; set up playfield
+	move.w  #(RASTER_Y_START<<8)|RASTER_X_START,DIWSTRT(a6)
+	move.w	#((RASTER_Y_STOP-256)<<8)|(RASTER_X_STOP-256),DIWSTOP(a6)
+
+	move.w	#(RASTER_X_START/2-SCREEN_RES),DDFSTRT(a6)
+	move.w	#(RASTER_X_START/2-SCREEN_RES)+(8*((SCREEN_WIDTH/16)-1)),DDFSTOP(a6)
+
+	move.w	#((SCREEN_BIT_DEPTH*2)<<12)|COLOR_ON|DBLPF,BPLCON0(a6)
+	move.w	#SCREEN_WIDTH_BYTES*SCREEN_BIT_DEPTH-SCREEN_WIDTH_BYTES,BPL1MOD(a6)
+	move.w	#SCREEN_WIDTH_BYTES*SCREEN_BIT_DEPTH-SCREEN_WIDTH_BYTES,BPL2MOD(a6)
+	
+
+	;; install copper list, then enable dma and selected interrupts
+	lea	copper(pc),a0
+	move.l	a0,COP1LC(a6)
+ 	move.w  COPJMP1(a6),d0
+	move.w	#(DMAF_BLITTER|DMAF_SETCLR!DMAF_COPPER!DMAF_RASTER!DMAF_MASTER),DMACON(a6)
+	;; move.w	#(INTF_SETCLR|INTF_VERTB|INTF_INTEN),INTENA(a6)
+	movem.l (sp)+,d0-a6
+	rts
\ No newline at end of file
diff --git a/017.dual_playfield/utils.s b/017.dual_playfield/utils.s
new file mode 100644
index 0000000..bdde568
--- /dev/null
+++ b/017.dual_playfield/utils.s
@@ -0,0 +1,23 @@
+waitVerticalBlank:	
+	movem.l d0-a6,-(sp)
+.loop	move.l	$dff004,d0
+	and.l	#$1ff00,d0
+	cmp.l	#303<<8,d0
+	bne.b	.loop
+	movem.l (sp)+,d0-a6
+	rts	
+
+
+
+waitRaster:		;wait for rasterline d0.w. Modifies d0-d2/a0.
+	movem.l d0-a6,-(sp)
+	move.l #$1ff00,d2
+	lsl.l #8,d0
+	and.l d2,d0
+	lea $dff004,a0
+.wr:	move.l (a0),d1
+	and.l d2,d1
+	cmp.l d1,d0
+	bne.s .wr
+	movem.l (sp)+,d0-a6
+	rts
\ No newline at end of file