gtpc3m0r | Concepts and Structures |
Up to this point, the programming elements in the TPF system have usually been called the TPF system. However, because we are about to discuss the details of the TPF system, it is necessary to further define the programming elements of the TPF system.
So far, most of the references to the TPF system actually refer to what is called the control program. The control program is the collection of programs that handles interrupts, coordinates concurrent processes, requests input from communications networks, provides system services, and so on.
TPF Entry introduced the concept of an Entry, which is associated with an input message from an end user. In order for Entries to be processed concurrently, an area of main storage is assigned to each Entry for use as an application work area and system work area. This area is called an entry control block, or commonly called an ECB.