Engineering Change Order Log

This document contains a log of four engineering change orders (FCOs) for the M7223 DP11 control module in the PDP-11 family. The changes include: - M7223-C0001: Correcting select decoding gates for sync extension bits. - M7223-C0002: Fixing a MOVB decoding issue for loading the transmitter. - M7223-C0003: Resolving an OVERRUN issue in large or overloaded systems by latching flip-flops. - M7223-C0004: Adding the 11380 IC as an allowable substitute for the DEC 380 bus receiver chip.