In 1995 a french engineer from the gaming company Psygnosis with help from Sega created this prototype for the Sega Neptune. Essentially just testing the concept but not one made in house in Sega
Unfortunately its now in some faggot redditors personal collection so there's not much to view. There is unique software with it but again its lost
https://x.com/CombyLaurent1/status/1945778425764970992

For context the Sega Neptune was a cancelled project to combine the Sega Genesis with the 32x