jamma and non jamma boards

Views 29 Likes Comments Comment
Like if this Guide is helpful
always be weary about those sellers selling arcade rom boards that list them as untested , even more so if they are a regular seller of amusement games and parts.
it can be extremely difficult to know when a seller is being honest ,to the average joe wiring up a non jamma board can be a difficult task.
someone selling off one or two rom boards who states they dont have a machine for testing to likely to be legit , i hate it when people say they are too lazy and list items as , take it as it is , untested , cant be bothered etc etc.
more than likely its a non working board and they want to give you false hope.
check in the usa , yes shipping can be expensive , but there is plenty of sellers who list working boards on a almost daily basis , same goes with canada , i have personally been known to ship over boxes at a time.


this is a jamma board , the universal pinout of the majority of rom boards after 1984.


this is a 1983  exerion board by jaleco , non jamma , notice the adapter at the connection ?
this adapter converts the wiring loom to jamma so it is a jamma standard.
jamma = japanese amusement machine manufactures association.

collecting these old arcade rom boards can be fun , but there is carefull messurements that needed to be put in place , here is some guides that i use myself to preseve these old boards.
* everytime i get a old arcade rom pcb , i test it ,assuming its working , i throw it in the bath tub and wash it with warm water , then dry it with a hair dryer ( becarefull when using the hair dryer as it gets hot )
As a general rule dont go rushing to plug it back in to test it , make sure its 100% dry or you could blow it up , i generally leave it for a day or 2.
Storage , always cover them seperatly in sealed type bags , this will stop dust and corrosion from happening.
And most importantly , never store your boards away for 20 years and expect them to work just like that.
from time to time pull them out and fire them up for a few hours , even if its once every 6 months , i cant stress this enough , leaving baords over long periods of time can result in caps and diodes failing and even possibly exploding , believe me i have seen this myself lol
happy ebaying
cheers baz
Have something to share, create your own Guide... Write a Guide
Explore more Guides