lispm window system(s)

[MMcM@TITANIA.Oberon.Dialnet.Symbolics.COM (Mike McMahon)]

    Date: Wed, 25 Apr 90 16:13:33 -0400
    From: fwhite@BBN.COM (Fredric M White)

     Will we ever see a new window system for lisp machines, where,
    for example, partially exposed windows are fully functional and 
    may even be partially off the main screen?

The embedded hosts' window systems in the MacIvory and UX400 have this
property.  They're faster too, if programmed properly (not just as smart
framebuffers for Genera compatibility).

Of course, you have to write your LISP program using a different set of
routines.  I assume you took that for grated, since it's hard to see the
benefit of a reimplementation of the native window system that was
compatible in every way except how it treated partially covered windows.