diff --git a/Core/camera.c b/Core/camera.c
index b0b9156..9b34998 100644
--- a/Core/camera.c
+++ b/Core/camera.c
@@ -137,7 +137,6 @@ void GB_camera_write_register(GB_gameboy_t *gb, uint16_t addr, uint8_t value)
             GB_log(gb, "Wrote invalid camera register %02x: %2x\n", addr, value);
             return;
         }
-        /* Todo: find out what these registers do */
         gb->camera_registers[addr] = value;
     }
 }
diff --git a/Core/display.c b/Core/display.c
index c8c326e..63847da 100755
--- a/Core/display.c
+++ b/Core/display.c
@@ -204,9 +204,11 @@ static void display_vblank(GB_gameboy_t *gb)
     }
     
     if (!gb->disable_rendering && (!(gb->io_registers[GB_IO_LCDC] & 0x80) || gb->stopped)) {
-        /* LCD is off, memset screen to white */
-        /* Todo: use RGB callback */
-        memset(gb->screen, 0xFF, WIDTH * LINES * 4);
+        /* LCD is off, set screen to white */
+        uint32_t white = gb->rgb_encode_callback(gb, 0xFF, 0xFF, 0xFF);
+        for (unsigned i = 0; i < WIDTH * LINES; i++) {
+            gb ->screen[i] = white;
+        }
     }
 
     gb->vblank_callback(gb);
diff --git a/Core/mbc.c b/Core/mbc.c
index 850d0be..9a17388 100644
--- a/Core/mbc.c
+++ b/Core/mbc.c
@@ -31,7 +31,6 @@ const GB_cartridge_t GB_cart_defs[256] = {
     {  GB_MBC5  , GB_STANDARD_MBC, false, false, false, false}, // 19h  MBC5
     {  GB_MBC5  , GB_STANDARD_MBC, true , false, false, false}, // 1Ah  MBC5+RAM
     {  GB_MBC5  , GB_STANDARD_MBC, true , true , false, false}, // 1Bh  MBC5+RAM+BATTERY
-    /* Todo: Rumble supported yet */
     {  GB_MBC5  , GB_STANDARD_MBC, false, false, false, true }, // 1Ch  MBC5+RUMBLE
     {  GB_MBC5  , GB_STANDARD_MBC, true , false, false, true }, // 1Dh  MBC5+RUMBLE+RAM
     {  GB_MBC5  , GB_STANDARD_MBC, true , true , false, true }, // 1Eh  MBC5+RUMBLE+RAM+BATTERY
@@ -128,7 +127,7 @@ void GB_configure_cart(GB_gameboy_t *gb)
         }
         gb->mbc_ram = malloc(gb->mbc_ram_size);
 
-        /* Todo: Some games assume unintialized MBC RAM is 0xFF. It this true for all cartridges types?*/
+        /* Todo: Some games assume unintialized MBC RAM is 0xFF. It this true for all cartridges types? */
         memset(gb->mbc_ram, 0xFF, gb->mbc_ram_size);
     }