DOS may be an old technology, but it still quite useful to computer professionals and ordinary computer owners. Some legacy programs still require the DOS interface, and DOS commands can be used for a number of troubleshooting and housekeeping functions. DOS commands can also be used to control LPT ports and send print jobs directly to the printers attached to those ports.
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Log on to your computer and click "Start." Choose "Printers" and highlight the printer you want to use from DOS.
Right-click the printer and choose "Properties." Go to the "Ports" tab and note the port number, LPT1, LPT2, or any other port that the printer is using.
Close the printer window and click "Start." Choose "Run" from the menu and type "cmd" in the box to open the DOS window.
Type "print/d portnumber: C:\filename," where portnumber is the LPT port number and file name is the name of the file you are printing. For instance, to print a file called Testfile from your C drive to the LPT1 port, you would type "print /d LPT1: C:\Testfile." Press enter to send the job to the printer.
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