mod chip concern,(will protected originals play)

[filfy]

Please Help, I am a bit concerned about having a Mod Chip installed in my playstation, I have read about the protected games that have Mod Chip detection. Does this mean that if I have a mod chip installed that the original games with the protection will not run, or only the backups?. If the game is patched does it matter which chip I have, 4 wire or stealth.
Thank you in advance for any reply.