diff --git a/gr-sim/hgr/Makefile b/gr-sim/hgr/Makefile
index 0f4d8757..f41a058d 100644
--- a/gr-sim/hgr/Makefile
+++ b/gr-sim/hgr/Makefile
@@ -6,7 +6,7 @@ SDL_LIBS= `sdl-config --libs`
 SDL_INCLUDE= `sdl-config --cflags`
 GR_SIM = ../gr-sim.a
 
-all:	fireworks fw_purple lines image_load hgr_view seven random16 scroll
+all:	fireworks fw_purple lines image_load hgr_view seven random16 scroll scroll-asm
 
 ###
 
@@ -73,6 +73,14 @@ scroll.o:	scroll.c
 
 ####
 
+scroll-asm:	scroll-asm.o $(GR_SIM)
+	$(CC) $(LFLAGS) $(SDL_LIBS) -o scroll-asm scroll-asm.o $(GR_SIM)
+
+scroll-asm.o:	scroll-asm.c
+	$(CC) $(CFLAGS) -c scroll-asm.c
+
+####
+
 
 clean:	
-	rm -f *~ *.o fireworks lines image_load hgr_view fw_purple seven random16 scroll
+	rm -f *~ *.o fireworks lines image_load hgr_view fw_purple seven random16 scroll scroll-asm
diff --git a/gr-sim/hgr/scroll-asm.c b/gr-sim/hgr/scroll-asm.c
new file mode 100644
index 00000000..10b2d4b6
--- /dev/null
+++ b/gr-sim/hgr/scroll-asm.c
@@ -0,0 +1,150 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <fcntl.h>
+
+#include "6502_emulate.h"
+#include "gr-sim.h"
+
+int main(int argc, char **argv) {
+
+	int ch,fd;
+
+	grsim_init();
+
+	home();
+
+	hgr();
+	/* Show all 280x192, no bottom text */
+        soft_switch(MIXCLR);
+        soft_switch(HISCR);
+
+	fd=open("MERRY.BIN",O_RDONLY);
+	if (fd<0) {
+		printf("Error opening!\n");
+		return -1;
+	}
+	read(fd,&ram[0x6000],8192);
+	close(fd);
+
+//	grsim_update();
+
+//	while(1) {
+//		ch=grsim_input();
+//		if (ch) break;
+//		usleep(100000);
+//	}
+
+	fd=open("BALLC.BIN",O_RDONLY);
+	if (fd<0) {
+		printf("Error opening!\n");
+		return -1;
+	}
+	read(fd,&ram[0x4000],8192);
+	close(fd);
+
+	/*	  0     1     2     3     4     5     6     7
+	00	= $2000 $2400 $2800 $2c00 $3000 $3400 $3800 $3c00
+	08	= $2080 $2480 $2880 $2c80 $3080 $3480 $3880 $3c80
+	16	= $2100 $2500 $2900 $2d00 $3100 $3500 $3900 $3d00
+	24	= $2180 $2580 $2980 $2d80 $3180 $3580 $3980 $3d80
+	32	= $2200 $2600 $2a00 $2e00 $3200 $3600 $3a00 $3e00
+	40	= $2280 $2680 $2a80 $2e80 $3280 $3680 $3a80 $3e80
+	48	= $2300 $2700 $2b00 $2f00 $3300 $3700 $3b00 $3f00
+	56	= $2380 $2780 $2b80 $2f80 $3380 $3780 $3b80 $3f80
+	-----
+	64	= $2028 $2428 $2828 $2c28 $3028 $3428 $3828 $3c28
+	72	= $20a8 $24a8 $28a8 $2ca8 $30a8 $34a8 $38a8 $3ca8
+	80	= $2128 $2528 $2928 $2d28 $3128 $3528 $3928 $3d28
+	88	= $21a8 $25a8 $29a8 $2da8 $31a8 $35a8 $39a8 $3da8
+	96	= $2228 $2628 $2a28 $2e28 $3228 $3628 $3a28 $3e28
+	104	= $22a8 $26a8 $2aa8 $2ea8 $32a8 $36a8 $3aa8 $3ea8
+	112	= $2328 $2728 $2b28 $2f28 $3328 $3728 $3b28 $3f28
+	120	= $23a8 $27a8 $2ba8 $2fa8 $33a8 $37a8 $3ba8 $3fa8
+	-----
+	128	= $2050 $2450 $2850 $2c50 $3050 $3450 $3850 $3c50
+	136	= $20d0 $24d0 $28d0 $2cd0 $30d0 $34d0 $38d0 $3cd0
+	144	= $2150 $2550 $2950 $2d50 $3150 $3550 $3950 $3d50
+	152	= $21d0 $25d0 $29d0 $2dd0 $31d0 $35d0 $39d0 $3dd0
+	160	= $2250 $2650 $2a50 $2e50 $3250 $3650 $3a50 $3e50
+	168	= $22d0 $26d0 $2ad0 $2ed0 $32d0 $36d0 $3ad0 $3ed0
+	176	= $2350 $2750 $2b50 $2f50 $3350 $3750 $3b50 $3f50
+	184	= $23d0 $27d0 $2bd0 $2fd0 $33d0 $37d0 $3bd0 $3fd0
+	-----
+	*/
+
+
+	int xx,addr,count=0;
+	int current,next;
+
+#define HIGH	0
+#define CURRENT	1
+#define NEXT	2
+
+	while(1) {
+		for(addr=0x4000;addr<0x6000;addr+=0x80) {
+			for(xx=0;xx<40;xx++) {
+				ram[CURRENT]=ram[addr+xx];
+				ram[NEXT]=ram[addr+xx+1];
+				if ((count%7==2) || (count%7==6)) {
+					ram[HIGH]=ram[NEXT]&0x80;
+				}
+				else {
+					ram[HIGH]=ram[CURRENT]&0x80;
+				}
+
+				if (xx==39) ram[NEXT]=ram[addr+0x2000];
+
+				a=ram[NEXT];
+				and(0x3);
+				asl();
+				asl();
+				asl();
+				asl();
+				asl();
+				ram[NEXT]=a;
+
+				a=ram[CURRENT];
+				lsr();
+				lsr();			// current>>=2;
+				and(0x1f);		// current&=0x1f;
+				ora_mem(HIGH);
+				ora_mem(NEXT);
+
+				ram[addr+xx]=a;
+			}
+
+			for(xx=0;xx<40;xx++) {
+				current=ram[addr+0x2000+xx];
+				next=ram[addr+0x2000+xx+1];
+				if ((count%7==2) ||(count%7==6)) {
+					ram[HIGH]=next&0x80;
+				}
+				else {
+					ram[HIGH]=current&0x80;
+
+				}
+				current>>=2;
+				current&=0x1f;
+				current|=ram[HIGH];
+				current|=(next&3)<<5;
+				ram[addr+0x2000+xx]=current;
+			}
+		}
+
+
+		grsim_update();
+		ch=grsim_input();
+		if (ch) break;
+		usleep(17000);	// 60Hz = 17ms
+		count++;
+		if (count==140) break;
+	}
+
+	while(1) {
+		ch=grsim_input();
+		if (ch) break;
+	}
+	return 0;
+}