MARK12

This document describes the MARK12 program, a utility designed for the PDP-12 to format and verify uncertified LINCtape. It provides instructions for loading and starting the program, guidance on selecting formatting options (Standard LINC, 129 Word, or 896 block formats), and best practices for tape handling to ensure reliability. The manual also includes mechanical considerations, troubleshooting information for tape failures, and detailed flowcharts and program listings to support the formatting process.