Thanks for the reply. Actually, I just realised today that the problem is not the lack of fonts but, as explained below, the way Windows editors behave -- specifically, Word, Wordpad, and, under some circumstances, Notepad.
Two fonts usually shipped with Windows, "Lucida Console" and "Courier New", have the upper-ASCII characters (AKA PC Extended Character Set), including the box-drawing characters.
But if you open a text file containing those characters in one of the above editors, it seems that some character substitution is performed when opening the file, with the result that those characters will neither be displayed nor printed correctly.
A workaround is to set one of the above fonts in Word, then paste the text into Word, etc, from a Console / Terminal window, or a DOS text editor running in a Console window. When entered into the Windows editor that way, the characters show up correctly, and will appear correctly when printed.
Regarding Notepad, if it has been set to use the "terminal" (non true-type) font, then you can open such a text file with Notepad and it won't perform any character substitution and the characters will display (but not print) correctly, but if it is set to use Lucida Console or Courier New, then no dice.
Does anyone know how or why this character substitution occurs during file open, and whether it can be prevented?
Mottel