Accept ROM path as a command line argument

src/chip8.rs

@@ -202,8 +202,7 @@ impl Cpu {
                 if x == 0 as u8 { return " " }else { return "\x1B[107m \x1B[49m" }
             }).collect::<Vec<&str>>().join(""), "|"));
         }
-        lines.push(format!("—————————————————————————————————————————————————————————————————— V{:?}", self.v));
-        lines.push("fdf".to_owned());
+        lines.push(format!("—————————————————————————————————————————————————————————————————— V{:?}\n", self.v));
         print!("{}", lines.join("\n"));
         if self.sound_timer > 0 {print!("\u{0007}")}
     }

src/main.rs

@@ -1,14 +1,19 @@
 mod chip8;
 use std::thread::sleep;
 use std::time::Duration;
+use std::env;
 
 fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    let rom = if args.len() > 1 {args[1].as_str()}else {"pong.rom"};
+
     let mut cpu = chip8::create_cpu();
     cpu.initialize();
-    cpu.load_rom("pong.rom").expect("Unable to load ROM");
+    cpu.load_rom(rom).expect("Unable to load ROM");
 
     loop {
         cpu.do_cycle();
-        sleep(Duration::from_millis(1000/70));
+        sleep(Duration::from_millis(1000/75));
     }
 }