A FORTRAN V Interactive Graphical System

The system described provides the capability of transforming an ordinary FORTRAN 5 program into a highly interactive program. The converted program makes the user, the display scope, and teletype console all an integral part of the execution of the program. At present, the system allows the user to modify or retrieve current values of variables in the program or to effect transfer of execution to various statement numbers when commands are typed. A group of display oriented programs is also described which greatly simplify the job of displaying the solution and aids for finding the solution of the problem. A SWAP method is used to provide sharing of the central processor between interactive programs and the batch programs.