i don't have MS-DOS drivers(maybe only the audio.. but i don't tested)...
when i press F8, when flash\pen drive is plugged, the menu is showed and i can enter on MS-DOS and no freezing....
if i write "Win", with flash\pen drive is plugged, the startup freeze too
(the caret continues blink.. but nothing happens)
yes.. maybe is the drivers of SD/MMC card or USB 2.0 ....
PS: i tested the games, but no audio..... it must be emulated or my audio drivers can have the MS-DOS audio?(i know that i can use speaker)