Quoted from PinballManiac40:Also is there a good all-I-n one IC tester that will test PIA and CPU parts?
The Neoloch tester can test PIA chips.
Quoted from PinballManiac40:Well, so I far I am not having any problems with any of the PIAs or CPUs from Jameco. I am hoping they are tested at some point before shipping.
Well, you got lucky. I've gotten counterfeit chips, and chips that are one thing and have been remarked as something else.
NLA = No Longer Available. Legitimate 6821 chips are not being manufactured and are NLA from most retailers.