Thanks for the quick replies.
When I choose 'select rom' in the menu I have a choice of megadrive, master system, game gear.
When I choose megadrive (the only roms i have - stored in root roms/md) the only thing shown is
'..' and 'back to the main menu'
When I click '..' it flashes 'Getting...
I have installed the latest ver of DrMDx ver 5b7a in its own folder and it installs and runs fine.
I created a roms/md folder in the root filled it with working roms but can't get DrMDx to find them.
I then moved the roms folder into the same folder as DrMDx.gpe and it still can't find them...