How to redirect LPT1 output to a disk file?

I am using dosemu 1.4.0.8 to run QuickBasic programs that are some 20+ 
years
old. Except for one issue this has been working great.  The problem is the
LPRINT statement, which I believe sends output to the parallel port.  I 
would
like to capture this output into a disk file.

At http://dosemu.org/docs/HOWTO/x246.html#AEN248 there is a section called
"How can I get the parallel ports to work?" which says

     The dosemu.conf has lines at the end to redirect printers to either
     lpr or a file.

On my computer these lines from /etc/dosemu/dosemu.conf seem to be what is
referred to:

##############################################################################
## Printer and parallel port settings

# Print commands to use for LPT1, LPT2 and LPT3.
# Default: "lpr -l", "lpr -l -P lpt2", and "" (disabled)
# Which means: use the default print queue for LPT1, "lpt2" queue for LPT2.
# "-l" means raw printing mode (no preprocessing).

# $_lpt1 = "lpr -l"
# $_lpt2 = "lpr -l -P lpt2"
# $_lpt3 = ""

# idle time in seconds before spooling out. Default: (20)

# $_printer_timeout = (20)

##############################################################################

However, these lines are not at all clear to me.  What changes are needed so
that lpt1 output goes to a disk file?

Thank you for your attention.

Roger House
Software Developer