DSx86 v0.01 Alpha is released. DSx86 is a PC emulator for Nintendo DS. It's purpose is to allow you to run old DOS games on your Nintendo DS game console.

Currently DSx86 emulates the following:
# 80186 processor (which is actually a 80286 processor without the protected mode stuff)
# MCGA graphics adapter (a stripped-down VGA with a maximum resolution of 320x200)
# SoundBlaster (including AdLib-compatible FM sounds) sound card
# 83-key US keyboard

Download: DSx86.nds
Download: DSx86.ini
Download: DSx86_LW2.nds
Source:Here