Addindx (Lap6-Dial-Ms Index Manipulator)

Summary

ADDINDX is a program utility designed for the LAP6-DIAL-MS system on the PDP-12 computer. Its primary purpose is to allow users to create, search for, or delete index entries on LINCtapes, specifically in areas (such as the "upper tape area") not automatically managed or utilized by the DIAL system. By providing this manual index manipulation, it helps users organize source programs or external data files without the risk of the system overwriting them.

The program functions as a handler for the "MILDRED" subroutine set, which manages disc and tape indices. Key operational features include:

• Search (L): Locates an existing file entry.
• Enter (E): Adds a new file entry or updates an existing one (includes a "Replace" function if a conflict arises).
• Delete (D): Removes an existing file entry from the index.
• Restart (R): Reboots the DIAL system.

The program requires an 8K (or larger) memory configuration to function correctly with the standard MILDRED subroutines. Detailed flowcharts are provided within the document to assist with the understanding of the program's logic and branching operations.