DEVICE		20V8;
TITLE		QUAD 4 TO 1 MUX;
NAME		C.L.G.;
SIGNATURE	QUAD_41;

/*
 *
 *     This example is taken from Lattice Semicounductors' GAL handbook.
 *   It can be found on page 5-39.
 *
 */

PIN	1	=	A0;			/* INPUTS TO Aout */
PIN	2	=	A1;
PIN	3	=	A2;
PIN	4	=	A3;

PIN	5	=	B0;			/* INPUTS TO Bout */
PIN	6	=	B1;
PIN	7	=	B2;
PIN	8	=	B3;

PIN	9	=	C0;			/* INPUTS TO Cout */
PIN	10	=	C1;
PIN	11	=	C2;
PIN	13	=	C3;

PIN	14	=	D0;			/* INPUTS TO Dout */
PIN	15	=	D1;
PIN	16	=	D2;
PIN	17	=	D3;
	
PIN	18	=	Dout;			/* OUTPUTS        */
PIN	19	=	Cout;
PIN	20	=	Bout;
PIN	21	=	Aout;
	
PIN	22	=	S0;			/* CONTROL INPUTS */
PIN	23	=	S1;

Aout = A0 & !S0 & !S1
     | A1 &  S0 & !S1
     | A2 & !S0 &  S1
     | A3 &  S0 &  S1;

Bout = B0 & !S0 & !S1
     | B1 &  S0 & !S1
     | B2 & !S0 &  S1
     | B3 &  S0 &  S1;

Cout = C0 & !S0 & !S1
     | C1 &  S0 & !S1
     | C2 & !S0 &  S1
     | C3 &  S0 &  S1;

Dout = D0 & !S0 & !S1
     | D1 &  S0 & !S1
     | D2 & !S0 &  S1
     | D3 &  S0 &  S1;