From: glen herrmannsfeldt on
EE EE <eengr.usa(a)> wrote:

> I want to synthesize a completely empty design, no clocks no combo and
> no sequential logic for a xilinx FPGA using ISE.

In the old days there was LCAEdit that would allow one to edit
the design at the LUT/switch level.

I think if you open LTAEdit you can just say SAVE without adding
anything and you get an empty design.

I thought a similar tool still existed. Otherwise, you need more
control over the output than synthesis tools will give you.

-- glen