updated _start to display Hello World!

1 files changed, 12 insertions, 3 deletions

diff --git a/StrixKernel/src/main.rs b/StrixKernel/src/main.rs
index 3d9e5f8..0376946 100644
--- a/StrixKernel/src/main.rs
+++ b/StrixKernel/src/main.rs
@@ -5,10 +5,19 @@
 
 use core::panic::PanicInfo;
 
-#[unsafe(no_mangle)] // don't mangle the name of this function
+static HELLO: &[u8] = b"Hello World!";
+
+#[unsafe(no_mangle)]
 pub extern "C" fn _start() -> ! {
-    // this function is the entry point, since the linker looks for a function
-    // named `_start` by default
+    let vga_buffer = 0xb8000 as *mut u8;
+
+    for (i, &byte) in HELLO.iter().enumerate() {
+        unsafe {
+            *vga_buffer.offset(i as isize * 2) = byte;
+            *vga_buffer.offset(i as isize * 2 + 1) = 0xb;
+        }
+    }
+
     loop {}
 }