Today, @robcfg offers us the "Dreamcast SDK Release 9 Europe", thanks to him. This SDK was supplied on two CD-ROMs. The first CD contains the main programming elements, such as the Shinobi libraries, compilers and sample files. The second CD contains documentation, graphics and sound tools, and a host of other surprises.
To download at the bottom of this page among 20 other SDKs, development tools and technical demos:
https://www.sega-dreamcast-info-games-p ... -dreamcast