So, a developer for the PC port of Sonic CD (the Dino version, to be exact) named PixelTheCat had joined Sonic Retro and mentioned they had an archive of a beta for the PC port and the development library files for a beta of Intel Dino 2.0. I reached out to them and have been given permission to share it for preservation! Sonic CD PC (Beta v0.992) Intel Dino 2.0 (Beta) Don't expect anything crazy with the Sonic CD PC beta, because it's a late build and came from someone who was working on the backend part of things instead of the gameplay. However, the Dino stuff would definitely be of used for decompilation.
New stuff! (Thanks, PixelTheCat!) Sonic CD PC (Beta v0.994) Intel Realistic Display Mixer (RDX, formerly Dino) Developer's Kit 2.1