I'm sure this is an easy question, but I can't find the info.
For MAME CHD files I know they are supposed to be in a folder with the same name as the ROM.
I thought in later versions of MAME you could simply add the CHD files to the ROM folder and they are not required to be in a folder.
Is this correct ? If so, from which version of MAME on can I simply place the CHD's as is into the ROM folder ?
Thank you all