Some time ago I released a GP2X port I made with the consent of DarkNation, now I ported the code the the Pandora handheld, it has been released at gp32x.com:
http://www.gp32x.com/board/index.php?/topic/56008-zelda-classic-for-pandora/
It works fullspeed (40fps) with sound and music, loads custom quests, everything seems to work perfectly.