Its been some time, probably 10+ years since I’ve used MAME. I love retroarch and would like to get back into MAME using it. I have a full rom set of MAME .201. I have downloaded ever MAME core retroarch has to offer but when try to load a rom nothing comes up to load. Im sure i can use another means to load them but would love to keep everything in retroarch if possible. Can someone point me in the right direction? Thank you in advance.
I would suggest you read through “Getting Started with Arcade Emulation” in the docs: https://docs.libretro.com/guides/arcade-getting-started/