Picture Book

The Picture Book Reference Manual provides comprehensive information for programmers writing application programs for the Digital Equipment Corporation GT40 Graphics Display Terminal. The Picture Book software package functions as a controller, enabling users to draw and manipulate graphic illustrations on the GT40 screen.

Key features of the manual include: - Overview and Setup: Details the components of the Picture Book controller, including the FORTRAN callable subroutines and the handler resident in the GT40 memory. - Graphics Operations: Explains methods for drawing with dots, vectors, and jots, as well as managing page types (Pictures, Figures, Graphs, and Tables). - FORTRAN Integration: Provides instructions for using FORTRAN subroutines to manage graphics, scale the display, and interact with the light pen. - Programming Tools: Describes the PICLET language for on-line interaction, as well as sample application programs like POLY (for polygon manipulation) and CLOCK (for dynamic plots). - System Information: Includes technical details on the ASCII telecommunication code, common markers, GT40 character sets, and assembly/operating instructions for the PDP-10 and DOS/BATCH systems.