starting to add object interface

src/display/mod.rs

@@ -6,6 +6,7 @@ use video::Video;
 
 pub mod bitmap3;
 pub mod bitmap4;
+pub mod object;
 pub mod tiled0;
 pub mod vblank;
 pub mod video;

src/display/object.rs

@@ -0,0 +1,12 @@
+#[non_exhaustive]
+pub struct Object {}
+
+impl Object {
+    pub(crate) fn new() -> Self {
+        Object {}
+    }
+
+    pub fn enable(&mut self) {}
+
+    pub fn disable(&mut self) {}
+}

src/display/tiled0.rs

@@ -3,7 +3,8 @@ use core::convert::TryInto;
 use crate::memory_mapped::MemoryMapped1DArray;
 
 use super::{
-    set_graphics_mode, set_graphics_settings, DisplayMode, GraphicsSettings, DISPLAY_CONTROL,
+    object::Object, set_graphics_mode, set_graphics_settings, DisplayMode, GraphicsSettings,
+    DISPLAY_CONTROL,
 };
 
 const PALETTE_BACKGROUND: MemoryMapped1DArray<u16, 256> =
@@ -101,6 +102,7 @@ pub struct Tiled0 {
     pub background_1: Background,
     pub background_2: Background,
     pub background_3: Background,
+    pub object: Object,
 }
 
 impl Tiled0 {
@@ -112,6 +114,7 @@ impl Tiled0 {
             background_1: Background { layer: 1 },
             background_2: Background { layer: 2 },
             background_3: Background { layer: 3 },
+            object: Object::new(),
         }
     }