Preliminary 11/74 KB11-E Difference Specification

This document is a technical memorandum dated August 1978, describing the hardware modifications and differences for the 11/74 KB11-E system compared to previous models. It provides an extensive list of interface signals between the CISP (Commercial Instruction Set Processor) and the KB11-E processor, categorized by module. The document details architectural changes, including ROM expansion, MUX additions for general register access, tristate logic redesigns for BUS INTD and SRBUS, and increased data display capabilities. Additionally, it lists specific hardware changes on a module-by-module basis (M8165 through M8185) to support the CIS, enhance reliability, and improve maintainability.