🚀 go-pugleaf

Dark Castles will run on any machine or environment that has an Alternate
Screen Buffer except maybe the 128K Mac.  Therefore it will run on the Mac SE
because the SE does have an alternate screen buffer (the SE however does not 
have an alternate sound buffer).  I know this is true because I have played
Dark Castles on an SE.  Now running Switcher or Macsbug, or anything that
moves Bufptr destroys the alternate screen buffer which prevents Dark Castle
from running.  Interesting enough the Prodigy 4 moves the Bufptr to below the
alternate buffer, so if you wish to run switcher and play Dark Castles in one
of the partitions you can on a Prodigy, but you can not do this on any other
machine.