(Topic ID: 68975)

Williams Indiana Jones L7 checksum error

By nodyeliab

10 years ago



Topic Stats

  • 8 posts
  • 4 Pinsiders participating
  • Latest reply 10 years ago by nodyeliab
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#1 10 years ago

I just upgraded IJ with the L7 rom and I'm getting a checksum error, is this normal for this rom? I upgraded from L6. I also tried downloading it from other sources and still get the same result. Thanks for your help!

#4 10 years ago

Thanks, I've tried different chips, and all ribbon cables are seated properly. I can take the L7 rom out and drop the L6 back in, and it works just fine. I'm very confused by this.

#6 10 years ago

What is strange is that the game still runs fine but gives a checksum error, I would think it would not run the code with an error.

#8 10 years ago

Ok, found the problem. I have no idea why, but I programmed two separate chips with L7 and was getting the checksum error. The programmer did a blank check and even validated the program each time I programmed the chip, I even read the program back off the chip and did a compare with the original file and it was a perfect match and still was getting the error. So I decided just for laughs to erase the chips again, but this time for a longer period of time. I reprogrammed it with the same chip, and now it works. Strange. I will have to remember to erase the chips for a longer period of time from now on.

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