Many years ago I used to have a TSR (Terminate and Stay Resident) programme that redirected data sent to LPT1 into a file.

A friend of mine now needs to do this with an old system that is due to be decommissioned, but I can't find the programme anywhere, and the only stuff I can find on t'internet is intended to work in some sort of Windows environment.

In short, the system boots from a 3.5" floppy into DOS, and needs to load the TSR before calling the main programme so that the programme thinks it's sending to LPT1, but instead it's automatically being redirected to a file. As far as I can see, the output is simple text with no control characters.

The only other alternative would be to find an Epson LX compatible dot matrix printer, as that's what was originally used until it perished...!