Update README.md

Author: stduhpf

README.md

@@ -1 +1,5 @@
-# bootsector-hexdump
+# bootsector-hexdump
+
+Just a simple bootloader that you can flash to a usb drive using dd or win32diskimager, and that print the content of the memory at the current location, using BIOS calls.
+
+To show the next chunk of 256 bytes, press any key, and to go back to the previous chunk,press 'w' (assuming you have a qwerty keyboard)