in_out.tdf

简单的CPU设计数字系统实验

SUBDESIGN in_out
(dr1,dr0,enable:input;
 in,out :output;
 halt:output;)
begin
  if ((enable==1)and(dr1==1) and (dr0==0)) then (in,out,halt)=(B"0",B"1",B"0");
  end if;
  if ((enable==1)and(dr1==0) and (dr0==1)) then (in,out,halt)=(B"1",B"0",B"0");
  end if;
  if ((enable==1)and(dr1==dr0)) then (in,out,halt)=(B"0",B"0",B"1");
  end if;
end;