<msg type="warning" file="Xst" num="646" delta="old" >Signal <<arg fmt="%s" index="1">IOS0</arg>> is assigned but never used. This unconnected signal will be trimmed during the optimization process.
<msg type="warning" file="Xst" num="647" delta="old" >Input <<arg fmt="%s" index="1">nBG_IOB</arg>> is never used. This port will be preserved and left unconnected if it belongs to a top-level block or it belongs to a sub-block and the hierarchy of this sub-block is preserved.
<msg type="warning" file="Xst" num="647" delta="old" >Input <<arg fmt="%s" index="1">DBG</arg>> is never used. This port will be preserved and left unconnected if it belongs to a top-level block or it belongs to a sub-block and the hierarchy of this sub-block is preserved.