KD11-B 16 Bit Processor Engineering Change Order Log

This document contains a series of Field Change Orders (FCOs) for the KD11-B 16-bit processor, used in PDP-11/05 and PDP-11/10 systems. The log tracks specific hardware and documentation updates implemented between 1972 and 1973. Key updates include:

• KD11B-00001: Addition of silk screen dash numbers to the KM11 maintenance module drawing.
• KD11B-E0002: Updates to ROM listings.
• KD11B-D0003: Corrections to Microprogram Flow and Symbolic/Binary Listings to include DATIP.
• KD11B-D0004: Updates to Microprogram Symbolic and Binary Listings to reflect M7261 revision 'L'.
• KD11B-D0005: Microprogram fix to ensure the ENB-OVFL signal is properly asserted in specific micro states (J2-2 and S5-1) to allow for proper stack overflow detection during certain instructions.