(Topic ID: 226644)

Need help with system 80b marco test rom

By pinball_ric

5 years ago



Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 5 years ago by MarAlb
  • Topic is favorited by 2 Pinsiders

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    #2 5 years ago

    It is looping...what happens after removing the second 24 pin eprom? Is this a gamerom or the extended testrom?

    Marco

    #4 5 years ago

    You are welcome...nice to read some feedback. What actually happened here....the testprogram scans for the presence of the extended testrom by comparing the first address with $55. If it "sees" this value it will execute the extended tests. However, system80B gameroms also have $55 at their address. The testprogram validates $55 and then tries to execute some unexpected code from the gamerom which crashes the testprogram.....

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