Future proofing

Cargo.lock

@@ -7,6 +7,7 @@ name = "KarxOS"
 version = "0.1.0"
 dependencies = [
  "bootloader",
+ "volatile",
 ]
 
 [[package]]
@@ -14,3 +15,9 @@ name = "bootloader"
 version = "0.9.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b7c452074efc3c0bfb241fb7bc87df04741c7c85e926f6a07c05f8fbd6008240"
+
+[[package]]
+name = "volatile"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6b06ad3ed06fef1713569d547cdbdb439eafed76341820fb0e0344f29a41945"

Cargo.toml

@@ -7,3 +7,4 @@ edition = "2018"
 
 [dependencies]
 bootloader = "0.9.8"
+volatile = "0.2.6"

src/vga_buffer.rs

@@ -1,3 +1,5 @@
+use volatile::Volatile;
+
 #[allow(dead_code)]
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 #[repr(u8)]
@@ -42,7 +44,7 @@ const BUFFER_WIDTH: usize = 80;
 
 #[repr(transparent)]
 struct Buffer {
-    chars: [[ScreenChar; BUFFER_WIDTH]; BUFFER_HEIGHT]
+    chars: [[Volatile<ScreenChar>; BUFFER_WIDTH]; BUFFER_HEIGHT]
 }
 
 pub struct Writer {
@@ -65,10 +67,10 @@ impl Writer {
                 let col = self.column_position;
 
                 let color_code = self.color_code;
-                self.buffer.chars[row][col] = ScreenChar {
+                self.buffer.chars[row][col].write(ScreenChar {
                     ascii_character: byte,
                     color_code
-                };
+                });
                 self.column_position += 1;
             }
         }