Fix vga printing newlines

src/main.rs

@@ -22,9 +22,10 @@ pub fn init() {
 pub extern "C" fn _start() -> ! {
 
   init();
-  x86_64::instructions::interrupts::int3();
+  //x86_64::instructions::interrupts::int3();
 
   println!("Gamarjoba, munde: {}", 1);
+  println!("Gamarjoba, munde: {}", 2);
   //panic!("A bad thing happened");
   loop {}
 }

src/vga_buffer.rs

@@ -103,7 +103,24 @@ impl Writer {
   }
 
   fn new_line(&mut self) {
+    for row in 1..BUFFER_HEIGHT {
+      for col in 0..BUFFER_WIDTH {
+        let character = self.buffer.chars[row][col].read();
+        self.buffer.chars[row - 1][col].write(character);
+      }
+    }
+    self.clear_row(BUFFER_HEIGHT - 1);
+    self.column_position = 0;
+  }
 
+  fn clear_row(&mut self, row: usize) {
+    let blank = ScreenChar {
+      ascii_char: b' ',
+      color_code: self.color_code,
+    };
+    for col in 0..BUFFER_WIDTH {
+      self.buffer.chars[row][col].write(blank);
+    }
   }
 }