CDRSER - Card Reader Service

This document provides a detailed listing and specification for the "CDRSER - Card Reader Service" module, a software component designed to manage card reader operations. It outlines essential parameters and control assignments, including various flags for indicating the status of card operations such as "Done", "Busy", "Error", and "End of File", as well as special I/O status words for different card types (First Card, Binary, Image).

The service defines key routines for handling card input (CRINP), processing card reader interrupts (CDRINT), and dispatching tasks. It supports multiple reading modes, specifically Hollerith Read, Binary Read, and Image Read. Functions for each mode address tasks such as converting Hollerith data to ASCII, managing device data block linkage, handling end-of-card and end-of-file conditions, detecting and reporting data errors, and efficiently managing data buffers. The document concludes with a comprehensive symbol table, detailing all internal and external references used within the module.