@@ -38,6 +38,15 @@ screen_write(UxnScreen *p, Layer *layer, Uint16 x, Uint16 y, Uint8 color)

 	}

 }

+static void

+screen_wipe(UxnScreen *p, Layer *layer, Uint16 x, Uint16 y)

+{

+	int v, h;

+	for(v = 0; v < 8; v++)

+		for(h = 0; h < 8; h++)

+			screen_write(p, layer, x + h, y + v, 0);

+}

+

 static void

 screen_blit(UxnScreen *p, Layer *layer, Uint16 x, Uint16 y, Uint8 *sprite, Uint8 color, Uint8 flipx, Uint8 flipy, Uint8 twobpp)

 {

@@ -183,8 +192,12 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)

 		if(addr > 0xfff0)

 			return;

 		for(i = 0; i <= n; i++) {

-			screen_blit(&uxn_screen, layer, x + dy * i, y + dx * i, &ram[addr], d[0xf] & 0xf, d[0xf] & 0x10, d[0xf] & 0x20, twobpp);

-			addr += (d[0x6] & 0x04) << (1 + twobpp);

+			if(!(d[0xf] & 0xf))

+				screen_wipe(&uxn_screen, layer, x + dy * i, y + dx * i);

+			else {

+				screen_blit(&uxn_screen, layer, x + dy * i, y + dx * i, &ram[addr], d[0xf] & 0xf, d[0xf] & 0x10, d[0xf] & 0x20, twobpp);

+				addr += (d[0x6] & 0x04) << (1 + twobpp);

+			}

 		}

 		POKDEV(0xc, addr);   /* auto addr+length */

 		POKDEV(0x8, x + dx); /* auto x+8 */