Two Decoders

This document is a technical schematic for the M151 module, designed as a two-decoder unit. The PDF includes a comprehensive parts list, detailing components such as integrated circuits (DEC 1074H20), resistors, capacitors, and the etched circuit board. The schematic displays the wiring and logic connections for the decoders, along with specific pin usage instructions and warnings regarding backplane twisted pair grounds. It is marked as proprietary to Digital Equipment Corporation, dated 1970.