En la FAQ de Dosbox encontre esto:
How do you print out of the DOS Box? Can you use the program's print to a parallel or serial printer?
A. If your application can print to a file, you can
redirect the file to a printer. On Windows at a command prompt or at
the Run option, you can use
COPY /B [FILE NAME] LPT1
to send a file to a printer (connected or mapped to LPT1). If the application can print in Postscript format, utilities like
Ghostscript/Ghostview
can be used to send the file to the printer. Also, some custom builds
of DOSBox have the ability to capture print data to a image. More
information about this beta feature can be found at
HAL9000's webpage
Si no te sirve pregunta en el foro de Dosbox