-(value of csw in r0)
-.br
-(value of buttons in r1)
-.sp
-.ti 0
-DESCRIPTION The setting of
-the console switches is returned in r0.
-The setting of the
-external buttons is returned in r1.
-.a
-The return is synced to
-a 30 CPS clock for graphical applications.
-.sp
-.ti 0
-SEE ALSO --
-.sp
-.ti 0
-DIAGNOSTICS none
-.sp
-.ti 0
-BUGS Currently the buttons are unavailable.