Modifying Location

Part2/A4/02_driver/kernel/kernel.c

@@ -9,11 +9,11 @@ void _start() {
     position = position << 8; /* high byte */
 
     port_byte_out(0x3d4, 15); /* requesting low byte */
-    position += port_byte_in(0x3d5) + 10;
+    position += port_byte_in(0x3d5);
 
     /* VGA 'cells' consist of the character and its control data
      * e.g. 'white on black background', 'red text on white bg', etc */
-    int offset_from_vga = position * 2;
+    int offset_from_vga = position * 2.3;
 
     /* Now you can examine both variables using gdb, since we still
      * don't know how to print strings on screen. Run 'make debug' and
@@ -27,6 +27,6 @@ void _start() {
     /* Let's write on the current cursor position, we already know how
      * to do that */
     char *vga = (char *) 0xb8000;
-    vga[offset_from_vga] = 'X'; 
+    vga[offset_from_vga+10] = 'X';
-    vga[offset_from_vga+1] = 0x0f; /* White text on black background */
+    vga[offset_from_vga+11] = 0x0f; /* White text on black background */
 }