Sample Combinational Text Design File

TITLE "4-bit Code Converter Example";
%-----------------------------------------------------------
File:			codeconv.tdf
Author:			C. S. Tritt, Ph.D.
Last update:	4/3/97

This AHDL file describes a Gray code to BCD converter using
a truth table.
-----------------------------------------------------------%
SUBDESIGN codeconv
(
	g[3..0]	:	INPUT;
	b[3..0]	:	OUTPUT;
)
BEGIN
	TABLE
		g3, g2, g1, g0 => b3, b2, b1, b0;
	
		 0,  0,  1,  0 =>  0,  0,  0,  0;
		 0,  1,  1,  0 =>  0,  0,  0,  1;
		 0,  1,  1,  1 =>  0,  0,  1,  0;
		 0,  1,  0,  1 =>  0,  0,  1,  1;
		 0,  1,  0,  0 =>  0,  1,  0,  0;
		 1,  1,  0,  0 =>  0,  1,  0,  1;
		 1,  1,  0,  1 =>  0,  1,  1,  0;
		 1,  1,  1,  1 =>  0,  1,  1,  1;
		 1,  1,  1,  0 =>  1,  0,  0,  0;
		 1,  0,  1,  0 =>  1,  0,  0,  1;	 	 
	END TABLE;
END;