DECnet-RSX Programmer's Reference Manual

This "DECnet-RSX Programmer's Reference Manual" serves as a comprehensive guide for developers writing network programs on DECnet-11M, DECnet-11M-PLUS, DECnet-11S, and DECnet-Micro/RSX systems. It details the programming facilities available in MACRO-II, FORTRAN 77, COBOL, and BASIC-PLUS-2 languages for several key networking functions:

1. Intertask Communication: Explains how tasks on different network nodes can exchange messages and data. This includes establishing active network tasks, logical links, building connect blocks, retrieving data from network queues, and sending/receiving various message types, with detailed macro and call descriptions for each supported language.
2. Remote File Access: Describes the programming calls for performing file operations on sequential files located on remote nodes, such as opening, creating, reading, writing, appending, closing, purging, and deleting files.
3. Task Control: Outlines FORTRAN-specific functionalities to execute, schedule, abort, or cancel installed tasks on remote RSX or IAS DECnet nodes.
4. Direct Line Access (DLX): Covers the use of Queued Input/Output (QIO) calls to bypass the standard DECnet user interface for enhanced performance in data transmission, especially for communication with non-DECnet systems or for reducing protocol overhead on Ethernet and non-Ethernet devices.

The manual provides conventions, programming examples, completion status information, and error codes to assist in developing robust network applications.