create a basic text file. E.G this is a print test for lpt.
save it to C:\Users\[yourname] test.txt
Print that from cmd
open cmd go to C:\Users\[yourname]
print /d:lpt1 test.txt
What happens
save it to C:\Users\[yourname] test.txt
Print that from cmd
open cmd go to C:\Users\[yourname]
print /d:lpt1 test.txt
What happens