git clone git://git.ipxe.org/ipxe.git
cd ipxe/src
make


#!ipxe
dhcp
chain http://example.com/boot/script.php


make EMBED=script.ipxe


sanboot iscsi:boot.ipxe.org::::iqn.2010-04. org.ipxe.boot:public

sanboot --no-describe --drive 0x80


qemu -kernel ipxe.lkrn -append 'dhcp && sanboot http://ftp.gwdg.de/pub/misc/freedos/files/distributions/1.0/fdfullcd.iso || shell'


qemu -kernel ipxe.lkrn -append 'dhcp && chain http://goo.gl/j8MbXI'