After the celebrations for the 25th anniversary of the system, ron has released this MSX emulator based off Marat Fayzullin’s fMSX.
Even though it’s described as a “quick port”, it works fullscreen with sound, supports both the controller and the DC keyboard, and it even runs MSX2 games like La Abadia del Crimen pretty well.
Controls:
D-Pad = Cursors
X = Menu
A = Select
Y = MSX Joy Button
B = Esc / Back
Start = Enter
Y+B = Select Player 1
Registered Dreamcast.es users can get the release here