CI20 Hardware Port Specification

This document describes the CI20 Hardware Port Adapter, which provides an interface between a KL10 operating system and the Corporate CI Bus. It covers the following key areas:

• System Overview: Defines the CI20 as an upgrade kit for KL10 model Bs, enabling loosely coupled environments and connection to HSC50 devices.
• Hardware Components: Details the standard modules (M3001 EBUS, M3002 MPROC, M3003 CBUS/PLI) and the extended tri-boards (L0109 Packet Buffer, L0100 Link Interface).
• Microcode: Explains the integral role of the port microcode in managing CI protocols and firmware interfaces.
• Operational Logic: Describes the EBUS and CBUS interface modules, the AM2901-based port microprocessor, and internal data paths like the MBUS.
• CSR Register: Provides a comprehensive definition of the Control and Status Register (CSR) bits used for communication between the KL10 and the port.
• Data Transfers: Outlines DMA transfer mechanisms, performance metrics, and supported data format modes (High Density, Industry Compatible, Core Dump).
• Maintenance and Diagnostics: Includes MTBF specifications, RAMP features for diagnostics, and cooling/installation requirements.