@@ -38,6 +38,14 @@ screen_change(Uint16 x1, Uint16 y1, Uint16 x2, Uint16 y2)

 	if(y2 > uxn_screen.y2) uxn_screen.y2 = y2;

 }

+void

+screen_fill(Uint8 *layer, int color)

+{

+	int i, length = uxn_screen.width * uxn_screen.height;

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

+		layer[i] = color;

+}

+

 void

 screen_rect(Uint8 *layer, int x1, int y1, int x2, int y2, int color)

 {

@@ -137,24 +145,18 @@ screen_resize(Uint16 width, Uint16 height)

 		return;

 	if(uxn_screen.width == width && uxn_screen.height == height)

 		return;

-	bg = malloc(width * height),

-	fg = malloc(width * height);

+	bg = malloc(width * height), fg = malloc(width * height);

 	if(bg && fg)

 		pixels = realloc(uxn_screen.pixels, width * height * sizeof(Uint32));

 	if(!bg || !fg || !pixels) {

-		free(bg);

-		free(fg);

+		free(bg), free(fg);

 		return;

 	}

-	free(uxn_screen.bg);

-	free(uxn_screen.fg);

-	uxn_screen.bg = bg;

-	uxn_screen.fg = fg;

+	free(uxn_screen.bg), free(uxn_screen.fg);

+	uxn_screen.bg = bg, uxn_screen.fg = fg;

 	uxn_screen.pixels = pixels;

-	uxn_screen.width = width;

-	uxn_screen.height = height;

-	screen_rect(uxn_screen.bg, 0, 0, width, height, 0);

-	screen_rect(uxn_screen.fg, 0, 0, width, height, 0);

+	uxn_screen.width = width, uxn_screen.height = height;

+	screen_fill(uxn_screen.bg, 0), screen_fill(uxn_screen.fg, 0);

 	emu_resize(width, height);

 	screen_change(0, 0, width, height);

 }

@@ -194,13 +196,13 @@ screen_dei(Uxn *u, Uint8 addr)

 void

 screen_deo(Uint8 *ram, Uint8 *d, Uint8 port)

 {

-	Uint8 *port_width, *port_height, *port_x, *port_y, *port_addr;

+	Uint8 *port_height, *port_x, *port_y, *port_addr;

 	Uint16 x, y, dx, dy, dxy, dyx, addr, addr_incr;

 	switch(port) {

-	case 0x3:

-		port_width = d + 0x2;

+	case 0x3: {

+		Uint8 *port_width = d + 0x2;

 		screen_resize(PEEK2(port_width), uxn_screen.height);

-		break;

+	} break;

 	case 0x5:

 		port_height = d + 0x4;

 		screen_resize(uxn_screen.width, PEEK2(port_height));

@@ -22,6 +22,7 @@ typedef struct UxnScreen {

 extern UxnScreen uxn_screen;

 extern int emu_resize(int width, int height);

+void screen_fill(Uint8 *layer, int color);

 void screen_rect(Uint8 *layer, int x1, int y1, int x2, int y2, int color);

 void screen_palette(Uint8 *addr);

 void screen_resize(Uint16 width, Uint16 height);

@@ -178,7 +178,7 @@ static void

 set_debugger(Uxn *u, int value)

 {

 	u->dev[0x0e] = value;

-	screen_rect(uxn_screen.fg, 0, 0, uxn_screen.width, uxn_screen.height, 0);

+	screen_fill(uxn_screen.fg, 0);

 	screen_redraw(u);

 }

@@ -253,8 +253,8 @@ static void

 emu_restart(Uxn *u, char *rom, int soft)

 {

 	screen_resize(WIDTH, HEIGHT);

-	screen_rect(uxn_screen.bg, 0, 0, uxn_screen.width, uxn_screen.height, 0);

-	screen_rect(uxn_screen.fg, 0, 0, uxn_screen.width, uxn_screen.height, 0);

+	screen_fill(uxn_screen.bg, 0);

+	screen_fill(uxn_screen.fg, 0);

 	system_reboot(u, rom, soft);

 	SDL_SetWindowTitle(emu_window, boot_rom);

 }