Added keyboard scancodes map

kernel/drivers/keyboard.c

@@ -0,0 +1,19 @@
+/* The keyboard driver works with a device called PS/2: to talk with this
+ * controller we can use serial communication(e.g. ports.h). The actual flow of 
+ * data is made with "commands", each command is one byte and the keyboard's 
+ * controller can send two type of response:
+ * ACK(Acknowledge): to acknowledge the previous command
+ * Resend: to resend the previous command due to an error.
+ * We have also to wait between the command, the data and the response of
+ * the PS/2 controller.
+ * This device should not exists anymore in any modern computer 
+ * motherboard; however the CPU(or the motherboard?) should be able to 
+ * simulate it even if we're using some USB keyboard.
+*/
+
+#include "keyboard.h"
+#include "isr.h"
+#include "ports.h"
+#include "tty.h"
+#include "../libc/string.h"
+#include "../libc/stdio.h"