@@ -184,20 +184,20 @@ screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)

 		Uint8 move = d[0x6];

 		Uint8 length = move >> 4;

 		Uint8 twobpp = !!(ctrl & 0x80);

-		Uint16 x = PEEK2(d + 0x8);

-		Uint16 y = PEEK2(d + 0xa);

-		Uint16 addr = PEEK2(d + 0xc);

-		Uint16 dx = (move & 0x1) << 3;

-		Uint16 dy = (move & 0x2) << 2;

 		Uint8 *layer = (ctrl & 0x40) ? uxn_screen.fg : uxn_screen.bg;

+		Uint16 x = PEEK2(d + 0x8), dx = (move & 0x1) << 3;

+		Uint16 y = PEEK2(d + 0xa), dy = (move & 0x2) << 2;

+		Uint16 addr = PEEK2(d + 0xc);

+		int flipx = (ctrl & 0x10), fx = flipx ? -1 : 1;

+		int flipy = (ctrl & 0x20), fy = flipy ? -1 : 1;

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

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

-			addr += (move & 0x04) << (1 + twobpp);

+			screen_blit(layer, ram, addr, x + dy * i * fx, y + dx * i * fy, ctrl & 0xf, flipx, flipy, twobpp);

+			addr += (move & 0x4) << (1 + twobpp);

 		}

-		screen_change(x, y, x + dy * length + 8, y + dx * length + 8);

-		if(move & 0x1) POKE2(d + 0x8, x + dx); /* auto x+8 */

-		if(move & 0x2) POKE2(d + 0xa, y + dy); /* auto y+8 */

-		if(move & 0x4) POKE2(d + 0xc, addr);   /* auto addr+length */

+		screen_change(x, y, x + dy * length * fx + 8, y + dx * length * fy + 8);

+		if(move & 0x1) POKE2(d + 0x8, x + dx * fx); /* auto x+8 */

+		if(move & 0x2) POKE2(d + 0xa, y + dy * fy); /* auto y+8 */

+		if(move & 0x4) POKE2(d + 0xc, addr);        /* auto addr+length */

 		break;

 	}

 	}