New Format Dectape for 551 (PDP-6)

This document contains a comprehensive assembly listing for the 'New Format Dectape Service' (DTCSRN) designed for the Digital Equipment Corp. PDP-6 computer, dated June 1969. The document provides detailed macros, system parameter configurations, and logic for handling Dectape operations, including lookups, directory management, renaming files, and dump mode input/output. It includes a complete symbol table for the associated software.