Patrick Aalto has released a new alpha of DS2x86, the DOS emulator exclusively for Supercard DSTwo

Changelog:

This version has a lot of work done on the protected mode features, especially
for the DOS4GW DOS Extender. Thus, this version runs the Doom game! There are
also some improvements and fixes in the real mode opcodes, especially the string
opcodes, so some problems running the games that work on DSx86 but did not work
on DS2x86 should be fixed. The higher resolution screen modes and audio support
have not been implemented yet, though.

Download
Source- DSx86 - Blog