TU10 Magtape Control Engineering Change Order Log

This document is an engineering change order log for the Digital Equipment Corporation TM11 TU10 Magtape Control. It details various modifications, corrections, and installation instructions for hardware and documentation issues identified between May 1972 and May 1973. Key updates include:
- Corrections to signal names and pin designations.
- Fixes for noisy signal wires causing hardware issues.
- Modifications to prevent system hangs when using DOS.
- Logic corrections for CRC error enabling and tape initialization.
- Adjustments to qualified select lines to prevent power clear issues on the bus.
- Updates to documentation regarding power supply cabinet location.