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Thread: Disabling #4 Pin Of Nes Lockout Chip

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    Pear (Level 6) wingzrow's Avatar
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    Default Disabling #4 Pin Of Nes Lockout Chip

    I'm considering doing this since i hear some of my games may run better if i do but are there any disadvantages to doing this? Have any of you heard of certain games not playing or any other dangers from doing this?

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    Strawberry (Level 2) dendawg's Avatar
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    You could always just clip the leg at the board and wire a switch between the board and what's left of the leg at the chip. This way, you can reactivate it whenever you want.

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    I have never heard of a disadvantage. I have mine disabled and have never had a problem. The only problem I see is if you screw up and cut the pin in the wrong place. Just be careful. Follow the instructions and get a nice clear picture of the board.

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    Pac-Man (Level 10) omnedon's Avatar
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    Apparently if you plan to play a Nintendo World Championships cart (rare original, or repro) a disabled lockout chip makes the timing fail or something.


    So, in essence, a disabled lockout chip does far more good than bad, but if NWC is a regular player in your machine, time to wire in a switch.

    Or have two NES's.

    IMO switch wiring is a bunch of work, with virtually zero benefit to 99.9% of end users. But for those who really care, this info should be handy.
    ... for your gaming and iPod service needs http://www.oldschoolgamer.com/ For all your Video Game console and iPod upgrade/repair needs!

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    I just did this to one of my NES's today and WOW what a difference in succesfull game loading! No more blinking power light!! I have a Contra cart that was always a pain in the ass to get loaded, and sometimes after loading, it would start blinking during the first few minutes of gameplay and I'd have to start over. I cleaned the pins on the cart every way possible and it still didn't help. After popping pin 4...... it loads first try every time!

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    Pac-Man (Level 10) omnedon's Avatar
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    All OSG repaired NES's work that way, lockout disabled or not. =P

    Disabling the lockout essentially turns off four of the 72 contact points.
    ... for your gaming and iPod service needs http://www.oldschoolgamer.com/ For all your Video Game console and iPod upgrade/repair needs!

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