See the files in the doc directory for documentation about SYSLINUX:

	syslinux.txt	    - Usage instructions; manual.
	distrib.txt	    - For creators of Linux distributions.
	pxelinux.txt	    - Documentation specific to PXELINUX.
	isolinux.txt	    - Documentation specific to ISOLINUX.
	extlinux.txt	    - Documentation specific to EXTLINUX.
	menu.txt	    - About the menu systems.
	usbkey.txt	    - About using SYSLINUX on USB keys.
	memdisk.txt         - Documentation about MEMDISK.

Also see the files:

	NEWS		    - List of changes from previous releases.
	TODO		    - About features planned for future releases.
	COPYING		    - For the license terms of this software.

SYSLINUX now builds in a Linux environment, using nasm.  You need nasm
version 2.03 or later (2.07 or later recommended) to build SYSLINUX
from source.  See http://www.nasm.us/ for information about nasm.
...