im woking on my first oneup arcade mod, im not new to mame builds but i have never used a pi. the last full build i did was a hyperspin build with custom cab and 10 systems 30k games ( about)

hyper spin was simple.

what im working on now is aone up build, i have the basic build knowledge, but im not sure how, what or where to get the imageg or what images to even get for the sd card?

can anyone direct me to a page and or wht files, im using the pi4