NIA20

This technical reference manual provides a detailed overview and guide to the Network Interconnect Adapter (NIA20). The NIA20 acts as a hardware/firmware interface between the KL10 operating system and high-speed serial Ethernet (NI) lines.

Key Sections:

• Introduction: Explains the NI subsystem, Ethernet specifications, and the CSMA/CD protocol.
• Implementation: Describes queue structures, command/response procedures, error handling, and the Control and Status Register (CSR).
• Installation: Provides detailed procedures for installing the NIA20 in KL10-E, KL10-D, and KL10-R systems, including cabling and power supply configurations.
• Functional Description: Details the port states, EBus and CBus interfaces, port link interface (PLI), and the port microprocessor logic.
• Logic Description: Offers deep-dive technical details into the port modules (M3001, M3002, M3003) and the NIA module, including microcode and internal logic components.