http://i.imgur.com/gDcenbW.jpg
http://i.imgur.com/xxS73On.jpg
https://www.youtube.com/watch?v=TREExFMlaB8
April 1998. Katana Set 2 SDK.
http://i.imgur.com/gDcenbW.jpg
http://i.imgur.com/xxS73On.jpg
https://www.youtube.com/watch?v=TREExFMlaB8
April 1998. Katana Set 2 SDK.
That upload is more complete, and much higher quality (480p) than the one uploaded to Youtube years ago in 240p.
Other info (going by memory, correct me if I'm wrong)
Katana Set 2 SDK was basically a Pentium II PC with early prototype PowerVR2 ARC prototype graphics card. Did not have the SH-4 CPU.
The later Katana Set 4 dev-kits (spring/summer '98?) had about 40% the performance of the final Dreamcast hardware.