> > MAME will output video in whatever your video card is set to. Most computers
> > run on 32-bit color by default, only older systems still run on 256 color / 16-bit
> > color.
> That's not really true - MAME will pretty much always pump out 24-bit (8-bit per
> channel) texture data, which may get downsampled if you're running in a lower depth
> video mode. Older versions of MAME could output lower depth, or even 8-bit indexed
> (256 colours), but that hasn't been supported in a long time.
Windows has always called it 32-bit mode, as opposed to 24-bit mode which was slow and generally not widely supported (presumably due to alignment or something)
being a pedantic asshole about it doesn't make the project look friendly.
as for what the original poster was asking, MAME only really works properly with those modes these days, things like the 8-bit palletized modes were removed a long time ago, chances are if you're running a modern version on a modern OS it is running in '32-bit colour' mode already.