zPXE implements PXE-like network booting functionality for z/VM guests.
zPXE carries the copyright notice:
Copyright 2006-2009, Red Hat, Inc
Brad Hinson <bhinson@redhat.com>
The first public release that I can find is when James Laska committed it to the Cobbler source tree in 2009:
commit be80abecb9dfcf529852c9536fb967e692316af7
Author: James Laska <jlaska@redhat.com>
Date: Thu Feb 19 16:50:03 2009 -0500
Adding zpxe.rexx and snippet to packaging
where it lived until S/390 support was removed from Cobbler in 2014.
The historical commits in this git repository were re-constructed based on Cobbler commits:
be80abecb9dfcf529852c9536fb967e692316af7
6a0123d7adf7210a7b276922e622cc94a2131344
7f1bc9f53ee9fc837cf10e69b1d577689ec6542d
2528d228f44dbbcad631ca969435e38dc18910df
0921e9b42306c00a547bb0932a0e5d9c0166fd17
ef06fd092b6a70bac05de1a088a8d9676be2c5de
588756aa7aefc122310847d007becf3112647944
6ab36a917c0b3e11cbfee68fc5ce43a47bb1ebf0