diff --git a/utils/gr-sim/twister/Makefile b/utils/gr-sim/twister/Makefile
index c9649307..7b68b9a0 100644
--- a/utils/gr-sim/twister/Makefile
+++ b/utils/gr-sim/twister/Makefile
@@ -6,7 +6,7 @@ SDL_LIBS= `sdl-config --libs`
 SDL_INCLUDE= `sdl-config --cflags`
 
 all:	generate_sines \
-	twist_6502
+	twist_6502 twist_dump
 
 ###
 
@@ -24,9 +24,17 @@ twist_6502:	twist_6502.o ../gr-sim.a
 twist_6502.o:	twist_6502.c
 	$(CC) $(CFLAGS) $(SDL_INCLUDE) -c twist_6502.c
 
+###
+
+twist_dump:	twist_dump.o ../gr-sim.a
+	$(CC) -o twist_dump twist_dump.o ../gr-sim.a $(LFLAGS) $(SDL_LIBS)
+
+twist_dump.o:	twist_dump.c
+	$(CC) $(CFLAGS) $(SDL_INCLUDE) -c twist_dump.c
+
 
 
 ###
 
 clean:	
-	rm -f *~ *.o dots dots_dump dots_play dots_minimal dots_6502 dots_play2
+	rm -f *~ *.o twist_6502 twist_dump
diff --git a/utils/gr-sim/twister/twist_dump.c b/utils/gr-sim/twister/twist_dump.c
new file mode 100644
index 00000000..95f0d9cd
--- /dev/null
+++ b/utils/gr-sim/twister/twist_dump.c
@@ -0,0 +1,114 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <malloc.h>
+#include <math.h>
+
+//#include "../gr-sim.h"
+//#include "../tfv_zp.h"
+
+unsigned char ram[40][48];
+
+
+int hlin(int color,int x1, int x2, int y) {
+
+	int j;
+
+	for(j=x1;j<x2;j++) ram[j][y]=color;
+
+	return 0;
+}
+
+int main(int argc,char **argv) {
+
+	int xx,yy,temp;
+	int total_bytes=0;
+	int y,j,color,old,run;
+	double pi=3.14,f,e,m,n,s,t,q,r;
+	double a[64*48],b[64*48];
+
+//	grsim_init();
+
+//	gr();
+
+	j=0;
+	for(e=0;e<pi*2.0;e+=0.1) {
+		m=15.0+cos(e)*12.0;
+		n=pi-sin(e)*pi;
+		for(y=0;y<48;y++) {
+			f=(double)y*0.5/m-n;
+			a[j]=8.0*cos(f);
+			b[j]=8.0*sin(f);
+			j++;
+		}
+	}
+
+
+
+//	clear_screens();
+//	soft_switch(MIXCLR);
+
+//	ram[DRAW_PAGE]=0;
+
+//	while(1) {
+	j=0;
+	for(e=0;e<63;e++) {
+		for(y=0;y<48;y++) {
+			s=20-a[j];
+			t=20-b[j];
+			q=20+a[j];
+			r=20+b[j];
+
+			/* re-draw background */
+			color=0;
+			hlin(color,12,27,y);
+
+			color=1;
+			m=s; n=t;
+			if (q<r) { m=q; n=r;}
+			hlin(color,m,n,y);
+
+			color=2;
+			if (r<s) { t=r; q=s;}
+			hlin(color,t,q,y);
+
+			j++;
+
+		}
+//		grsim_update();
+
+		printf("; Frame %d\n",(int)e);
+		for(yy=0;yy<24;yy++) {
+			old=0xff; run=0;
+			printf(".byte ");
+			for(xx=12;xx<27;xx++) {
+				temp=(ram[xx][(yy*2)+1]<<4)+
+						(ram[xx][(yy*2)]);
+				if (temp!=old) {
+					if (xx!=12) printf(",");
+					printf("$%02X",temp);
+					total_bytes++;
+					old=temp;
+				}
+			}
+			printf("\n");
+		}
+
+
+		/* approximate 50Hz sleep */
+//		usleep(20000);
+//		usleep(40000);
+
+//		ch=grsim_input();
+//		if (ch==27) {
+//			return 0;
+//		}
+	}
+
+	printf("; Total bytes = %d\n",total_bytes);
+
+//	}
+
+	return 0;
+}