setup framebuffer with console

src/root.zig

@@ -25,10 +25,10 @@ pub const PixelFormat = enum(u32) {
 /// `pitch` bytes between the start of one row and the next (which may be larger
 /// than `width * 4` due to hardware padding).
 pub const Framebuffer = extern struct {
-    base: usize,
-    width: u32,
-    height: u32,
-    pitch: u32,
+    base: usize,            // the memory address where pixel data starts
+    width: u32,             // visible pixels per row (e.g. 1920)
+    height: u32,            // visible rows (e.g. 1080)
+    pitch: u32,             // bytes from the start of one row to the start of the next
     format: PixelFormat,
 };