Merge remote-tracking branch 'atari800/master'
Allow configuring --with-audio=sdl and --with-video <> sdl
Allow configuring --with-audio=win in non-DirectX targets
Use common bankswitch functions in both memory models
Add support for the alternate variant of MaxFlash 1 MB.
Merge branch '5200-supercart-fixes'
Avoid unnecessary memory copying of 5200 Super Carts
Fix segfault when a 5200 Super Cart cartridge is removed