David Gilbert sez:
# 	However, in this configuration, when I drop into the DB>
# prompt, it does not reset the console to black and white --- it leaves
# the colour planes on rendering the text usually unreadable.  Also
# affected is the plain old console prompt --- after X has run at least
# once, the console prompt will be in some strange random (usually an
# ugly pink) colour, and it won't come out of it.

Sounds like we need to implement something equivalent to clear_colormap
(SunOS).