(Topic ID: 122234)

Installing Barakandl's NVRAM Battery Eliminator- Vid's Review

By vid1900

4 years ago

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  • 211 posts
  • 49 Pinsiders participating
  • Latest reply 3 years ago by CNKay
  • Topic is favorited by 113 Pinsiders


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    #129 3 years ago

    I wonder what it would take to copy off a data dump of the existing RAM chip, put it on the NVRAM, and thus restore the game's current high score list?

    #133 3 years ago
    Quoted from barakandl:

    The GQ-4X can read / write the FM1608 and 6264 NVRAMs when set to DS1225Y.
    You are going to have to get pretty damn creative to read the SRAM without losing the battery connection. They hold data very very briefly if you are fast enough with the battery removed. Better off just writing down the high scores and scoring them back into the game with the glass off if you really want to remember. That or carve the score into the cabinet.

    It was more of a thought exercise, as I totally agree. Still, you would think a data dump via the MPU might be possible.

    #136 3 years ago
    Quoted from CactusJack:

    Not sure if it will cause any issues but you could solder a 3 volt battery cell across the power and ground pins if the original CMOS RAM before removing it to preserve high scores and bookkeeping.
    It's a little like what slot techs do when the mpu reports a low battery before it drops below 2 volts. They apply 5 volt to the board while changing the battery.

    So in theory, you could solder the 3 volt battery cell, transport the RAM to a GQ-4X, read the memory, copy it to the NVRAM, and you should be good.

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