Logic to load a rom file

src/bin/main.rs

@@ -1,4 +1,7 @@
-fn main() {
+use rust_boy::rom::ROM;
-    println!("TEST");
+
-    println!("{}", false as u8);
+fn main() -> std::io::Result<()> {
+    let myrom = ROM::load_file("roms/cpu_instrs.gb".to_string())?;
+    myrom.print_content();
+    Ok(())
 }

src/lib.rs

@@ -1,2 +1,3 @@
 pub mod utils;
 pub mod cpu;
+pub mod rom;

src/rom.rs

@@ -0,0 +1,21 @@
+use std::fs::File;
+use std::io::Read;
+
+pub struct ROM {
+    bytes: Vec<u8>,
+}
+
+impl ROM {
+    pub fn load_file(filename: String) -> std::io::Result<Self> {
+        let mut file = File::open(filename)?;
+        let mut bytes = vec![];
+        file.read_to_end(&mut bytes)?;
+        Ok(Self {
+            bytes,
+        })
+    }
+
+    pub fn print_content(&self) {
+        println!("{:02X?}", self.bytes);
+    }
+}

src/utils.rs

@@ -1,3 +1,5 @@
+pub struct AddressRange(u16, u16);
+
 pub enum BitIndex {
     I0,
     I1,