21174 Core Logic Chip

This document is the technical reference manual for the Digital Semiconductor 21174 core logic chip, a single-chip PCI-to-21164 interface designed for low-cost workstations. It provides detailed information on the 21174's internal architecture, including the memory controller, PCI interface, and flash ROM interface. The manual also includes comprehensive register definitions, system address space organization, electrical and thermal specifications, and information on managing specific PCI DMA issues.