via http://www.aep-emu.de/
DSx86 is a DOS emulator for Nintendo DS.

Quote:
DSx86 v0.42 Beta Release Notes
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This version has the following fixes and improvements:
- Fixed a couple of bugs in the proportional font 80x25 Smooth scaling.
- Another attempt to fix the "Smooth" mode initialization when used in dsx86.ini.
- Implemented DOS function INT 21 AH=87 (Moria)