Plotter Service Routine

This document provides the source code and service routines for a plotter interface (PLTSER), used for managing plotter output on Digital Equipment Corporation hardware. It includes:

• Device Definitions: Defines device codes and control signals for plotter operation.
• Dispatch Table: Contains initialization, error handling, and routine dispatching for plotter tasks.
• Output Processing: Includes detailed logic for setting up byte pointers and counters, handling buffers, and managing the plotter device chain.
• Interrupt Service: Manages device interrupts to ensure data is efficiently transferred to the plotter hardware.
• Symbol Table: An extensive list of labels, entry points, and external references used throughout the routine.