Header: gdisysdef Purpose: Needed for low level Gispy Display Interface routines. Category: DISPLAY File: gdisysdef.h Author: K.G. Begeman Description: This header file defines the functions available in the Gipsy Display Interface LIBrary. Updates: Dec 2, 1990: KGB Document created Nov 20, 1997: KGB GDI_RESTORE/GDI_SAVE added.