All the bitstream files included in this directory that follow the name pattern ztex_*.bit are:

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Copyright (C) 2009-2011 ZTEX GmbH.
http://www.ztex.de


This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 3 as
published by the Free Software Foundation.

This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, see http://www.gnu.org/licenses/.

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You can find the original sources at the BTCMiner project home page: http://www.ztex.de/btcminer/