@echo off
if exist *.bak erase *.bak
if exist *.prn erase *.prn 
if exist *.o   erase *.o
if exist *.rel erase *.rel
if exist *.cpm erase *.cpm
if exist *.sym erase *.sym
if exist *.com erase *.com
if exist *.a80 erase *.a80
if exist dwg.lib erase dwg.lib