Core standard graphic package for the VGI 3400

Implementing the 1977 Core System standard proposal of ACM/Siggraph for a state-of-the-art microprogrammable refresh display system presents a number of design tradeoffs. Thus, there are areas of contention between a strict interpretation of the standards and the advanced capabilities of the display that led the user to purchase such a system in the first place. These methodological differences lead to a “loosely defined” Core system, which adheres to the spirit of the standards without sacrificing display performance.