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This report gives a discussion of the design of a peripheral controller chip to Interface a Cambridge Ring Node to a MC68000 host machine using VLSI technology. The design of such a chip involves following a design strategy. The strategy used Identities what the Interface should be capable of doing. developing a functional description of the interface. mapping the interface onto silicon and finally verifying the design. The characteristics of the interface and the design strategy. along with the software used In the design. will be discussed.