DTELDR Load/Dump Utility for PDP-11 from DECsystem-10 over DTE20

This document is a technical user guide for the DTELDR utility, a software tool designed to bridge a DECsystem-10 host and a PDP-11 front-end processor. It provides instructions on how to use the utility for loading programs onto the front-end system and for dumping front-end memory to disk via the DTE20 interface. Key sections cover command syntax, file specification conventions, detailed explanations of various supported file formats (packed, image, and diagnostics), and an alphabetical reference for operational switches. Furthermore, it contains comprehensive troubleshooting information, including a list of error messages with their corresponding causes and recommended corrective actions.