Protel99se的库中没有89c51,80c51/80c52在下而库中有:Program Files\Design Explorer 99 SE\Library\Sch\AMD Microcontroller.DDBProgram Files\Design Explorer 99 SE\Library\Sch\Philips.DDBProgram Files\Design Explorer 99 SE\Library\Sch\Intel Databooks.DDB