kataria0 wrote on Mar 19th, 2009, 2:52pm:I have a laptop running Windows Vista 64-b version so it needs to be compatible.
I'm not sure about Vista-64bit version.
But followings are candidates.
http://ghdl.free.fr/There is binary package for Windows.
You can also use GHDL via Cygwin by compiling sources in Cygwin.
http://freehdl.seul.org/FreeHDL require MinGW or Cygwin.
Qucs use FreeHDL as Logic Simulator.
http://qucs.sourceforge.net/