🚀 go-pugleaf

I have a program which runs in graphics mode.  We need to deal with
logical floppies (i.e., A: and B: w/ only one real disk drive).

The problem is that the disk change message, "Insert diskette for
drive B: and press any key when ready", is printed directly to the
screen.

I would like to get control over this:
   - at least capture it to a window
   - possibly change the message to be more descriptive

How is this handled (DOS or BIOS) and how can I change the behavior?

One partial solution is to move the "text cursor" to a known position
and at least the message will come out there the first time.  But this
is a kludge.

Another alternative is to just use a single drive an manage the
swapping directly (but there is a minor problem that files on the
other disk should be kept open across the swap process).

Does anyone know how to handle this for real?