diff --git a/gr-sim/hgr/scroll.c b/gr-sim/hgr/scroll.c
index 136f439a..a7e169f7 100644
--- a/gr-sim/hgr/scroll.c
+++ b/gr-sim/hgr/scroll.c
@@ -23,16 +23,16 @@ int main(int argc, char **argv) {
 		printf("Error opening!\n");
 		return -1;
 	}
-	read(fd,&ram[0x2000],8192);
+	read(fd,&ram[0x4000],8192);
 	close(fd);
 
-	grsim_update();
+//	grsim_update();
 
-	while(1) {
-		ch=grsim_input();
-		if (ch) break;
-		usleep(100000);
-	}
+//	while(1) {
+//		ch=grsim_input();
+//		if (ch) break;
+//		usleep(100000);
+//	}
 
 	fd=open("BALLC.BIN",O_RDONLY);
 	if (fd<0) {
@@ -42,9 +42,47 @@ int main(int argc, char **argv) {
 	read(fd,&ram[0x2000],8192);
 	close(fd);
 
-	grsim_update();
+	/*	  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 x,y,i,j,addr;
 
 	while(1) {
+		for(addr=0x2000;addr<0x4000;addr+=0x80) {
+			for(x=0;x<40;x++) {
+				ram[addr+x]=ram[addr+x+1];
+			}
+		}
+
+		grsim_update();
 		ch=grsim_input();
 		if (ch) break;
 		usleep(100000);
diff --git a/xmas_2018/notes b/xmas_2018/notes
index 2a2b3d01..197e5eab 100644
--- a/xmas_2018/notes
+++ b/xmas_2018/notes
@@ -21,3 +21,12 @@ Merry Christmas picture:
 	https://www.freevector.com/merry-christmas-text
 	Creative Commons Attribution 4.0 license.
 
+
+
+For x=0 to 80
+	For y=0 to 192
+		old=image[x][y]<<2 | image[x+1][y]
+		screen: 01 23 45 67 89 ab cd
+
+		[1] 6 54 32 10  [2] dc ba 98 7
+