QMS Print System 1725E Getting Started Manual page 45

To test communication between your printer and your PC, first create
a short file that ejects a page from the printer. Then send the file to
the printer.
To create the test file, type the following commands at the DOS
prompt:
copy con printest.ps
showpage
^D^Z
You can use either uppercase or lowercase letters; however, you
must type the PostScript showpage operator in lowercase letters.
The symbol means to press the Enter key. To produce the ^D and
^Z, press and hold down the Ctrl key while you type the appropriate
letters (d and z). These characters signify the end of the file and must
always be included.
1 To send the PRINTEST.PS file you just created to the printer,
type
print printest.ps
2 If you're prompted for the name of the list device, type
lpt1
or type the name of the PC's parallel port to which the printer is
connected (for example, lpt2 or lpt3).