Int 2F Fn AC12  - Qrip/tsr - Begin Popup-window Mode                       [V]

   AX = AC12h
   DI = 1092h

Return: nothing

Notes: if DI <> 1092h on entry, QRIP chains the call
   while popup-mode is in effect, the terminal program can write to the
     screen (and easily restore it) by outputting a RIP file with AX=AC04h
     or AX=AC05h
   QRIP will automatically drop out of popup-window mode if the terminal
     program invokes RIP pick-lists
   any changes to the protected area will be restored when popup-window
     mode is cancelled

See Also: AX=AC04h,AX=AC11h,AX=AC13h,AX=ACF0h