Heres a Beta Release of a Sega Dreamcast Emulator for WIndows, heres the release notes:

Reicast Git (2018/03/10) is compiled. reicast is a multi-platform Dreamcast emulator. The project is currently in Alpha, usability, performance and stability issues are to be expected. Cortex-A9 dualcore, 1ghz+ is the minimum hardware for decent speeds.

Reicast Git Changelog:
* Merge pull request #884 from williansti/master
* update PT-BR brazilian translation
* Merge pull request #1068 from promi/fix-evdev_mapping
* Fix #1051
* Merge pull request #1080 from nhoudelot/master
* GNU Public License -> GNU General Public License
* fix typo

more info