Altra works on ED64+, for PAL rom you have to go in settings (right cross) and activate PAL for TV and sometime force NTSC or PAL mode, even if it's PAL rom sometime NTSC works.
I have a problem with long filename .... if the filename is more than 64 caracs the rom won't load ...
For example, a 21-inch (diagonal) GE color television in 1965 had an advertised price of $499, which is equal to $4,724 in today's dollars, according to the federal government's inflation calculator.