It's difficult to find a good english-language arcade forum, mostly they are so focused on emulators. Well, now when system16 has an Irem section i hope i could get some help/advice with two Irem games :-)

First it's Vigilante (M75) it says "ram ng (1) (2) (3)" when it boots up.
and second there is Ninja Spirit (M72) it says "ram ng 8" in testmenu.
so does anybody have any idea what rams that have these numbers?


I have played the two first levels of each game and seen no errors so far.