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This report develops guidelines for implementing new devices for the three-dimensional version of the Graphics Compatibility System (GCS). Included are the definition of device-dependent graphics, status area initialization values, functional specification of device-dependent routines, factors involved in supporting intelligent refresh devices, and a phased sequence for implementing new devices. (Author)

This report gives guidelines for implementing the Graphics Compatibility System (GCS) on a host-computer system. The following areas are discussed: a. Graphics Status Area (GSA) values; b. Functional specifications for each of the three-dimensional (3D) GCS computer-dependent routines; c. Factors involved in supporting 3D GCS on a computer system; and d. Phased sequence for implementing 3D GCS on a new computer system. (Author)