SUBROUTINE RMMODE

 RMMODE controls the  Ramtek display  window refresh. Ignored by non-window devices.

CALL RMMODE (ic,iw,ip,is,ie)

ic  (I): channel number (from RAMOPEN)
iw  (L): update display when plotting
ip  (L): update refresh/backup display when plotting
is  (L): refresh control
         = false : change iw, ip
         = true  : force screen refresh, iw,ip ignored
ie    (I): (returned) error code