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The MC68060 delivers up to 3 times the performance relative to its predecessor, the MC68040. Furthermore, the MC68060 bus is very similar in comparison to the MC68040 bus. A socket adapter from Interconnect Systems is available that converts the MC68060 bus to operate in some existing MC68040 systems. For these reasons, the MC68060 is a viable upgrade processor to an existing MC68040-based system.However, to achieve the aggressiveperformance target, the MC68060 leaves some instructions unimplemented to streamline internal operations.This article discusses in detail the differences between the MC68060 and the MC68040 from a software perspective and discusses the software challenges that may arise when porting software to the new MC68060.
