Refactor address ranges

src/ppu.rs

@@ -3,7 +3,7 @@ use crate::utils::{
     get_bit,
     set_bit,
 };
-use crate::bus::Bus;
+use crate::bus::{Bus, BANK_ZERO};
 
 struct ColorPalette(u8, u8, u8, u8);
 
@@ -91,6 +91,10 @@ impl PPU {
         }
     }
 
+    fn get_sprite(address: u16) {
+
+    }
+
     fn get_scroll_x(bus: &Bus) -> u8 {
         bus.read(SCROLL_X_ADDRESS)
     }