blob: cb6c8d76e30dbb56b03a8f0e51969fa706f763a7 [file] [log] [blame]
module tristate (en, i, io, o);
input en;
input i;
inout [1:0] io;
output [1:0] o;
wire [1:0] io;
`ifndef BUG
assign io[0] = (en)? i : 1'bZ;
assign io[1] = (i)? en : 1'bZ;
assign o = io;
`else
assign io[0] = (en)? ~i : 1'bZ;
assign io[1] = (i)? ~en : 1'bZ;
assign o = ~io;
`endif
endmodule
module top (
input en,
input a,
inout [1:0] b,
output [1:0] c
);
tristate u_tri (
.en (en ),
.i (a ),
.io (b ),
.o (c )
);
endmodule