Development of Digital's PCI Chip Sets and Evaluation Kit for the DECchip 21064 Microprocessor

are two configurations of a core logic chip set for the DECchip 21064 family of Alpha AXP microprocessors.1 The core logic chip set provides a 32-bit PCI local bus interface, cache/memory control functions, and all related data path functionality to the system designer. It requires minimal external logic. The EB64+ kit is an evaluation and development platform for computing systems based on the DECchip 21064 microprocessor and the core logic chip set. The EB64+ kit also served as a debug platform for the chip sets. The DECchip 21071 and the DECchip 21072 chip sets and the EB64+ evaluation kit were developed to proliferate the Alpha AXP architecture in the industry by providing system designers with a means to build a wide range of uniprocessor systems using the DECchip 21064 processor family with minimal design and engineering effort.2 The core logic chip set and the EB64+ evaluation kit were developed by two teams that worked closely together. This paper describes the goals of both projects, the major features of the products, and the design decisions of the development teams. The Core Logic Chip Set