File list (Check if you may need any files):
knob
....\knob.bgn
....\knob.bit
....\knob.bld
....\knob.cmd_log
....\knob.drc
....\knob.ise
....\knob.ise_ISE_Backup
....\knob.lfp
....\knob.lso
....\knob.ncd
....\knob.ngc
....\knob.ngd
....\knob.ngr
....\knob.pad
....\knob.par
....\knob.pcf
....\knob.prj
....\knob.stx
....\knob.syr
....\knob.twr
....\knob.twx
....\knob.ucf
....\knob.unroutes
....\knob.ut
....\knob.v
....\knob.xpi
....\knob.xst
....\knob_last_par.ncd
....\knob_map.mrp
....\knob_map.ncd
....\knob_map.ngm
....\knob_pad.csv
....\knob_pad.txt
....\knob_summary.html
....\knob_vhdl.prj
....\ppt.v
....\ppt.v.bak
....\prjname.lso
....\xst
....\...\dump.xst
....\...\........\knob.prj
....\...\........\........\ngx
....\...\........\........\...\notopt
....\...\........\........\...\opt
....\...\projnav.tmp
....\...\work
....\...\....\hdllib.ref
....\...\....\vlg0A
....\...\....\.....\knob.bin
....\_impact.cmd
....\_impact.log
....\_ngo
....\....\netlist.lst
....\_xmsgs
....\......\bitgen.xmsgs
....\......\map.xmsgs
....\......\ngdbuild.xmsgs
....\......\par.xmsgs
....\......\trce.xmsgs
....\......\xst.xmsgs
....\【抖动对比】knob.v