riters.</B>
<LI> <A HREF="#notes">Notes on PCs</A>
<LI> <A HREF="#example_os">Example OS Code</A>
<LI> <A HREF="#example_boot">Example Bootloader Code</A>
</UL>

<HR>

<H2><A NAME="motivation">Motivation</A></H2>

Every OS ever created tends to have its own boot loader.  Installing a new
OS on a machine generally involves installing a whole new set of boot
mechanisms, each with completely different install-time and boot-time user
interfaces.   Getting multiple operating systems to coexist reliably on one
ma