Actarus has released a new version of the DS Emulator for Windows:

heres whats new

Here's the changelog :

Fixed a bug in savestates management.
Fixed a bug in dmas transfers.
Fixed a bug in cardrom command.
Fixed some bugs in debugger window.
Added new DMA channels and cardrom features, like latency etc etc.It's an experiment.

Anyway it's a beta version, please report me all bugs. Thanks

Actarus