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This video shows you how to compile Yaffs into Linux. It’s just over 10 minutes long, and if you download it, it’s 325MB. After watching this video you should be able to include Yaffs in Linux.

This video covers the preparation needed to include Linux in Yaffs - describing the kernel build-tools needed, how to get the kernel source code and Yaffs source code. It's about 175Mb and 6m30 long.

This video from 2007 describes Yaffs1 and Yaffs2. The slides from the video are available.