How can I modify An EC firmware?

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  • caspian
    Badcaps Legend
    • Oct 2015
    • 1589
    • Laptop
    #1

    How can I modify An EC firmware?

    Dear members,

    I have an HP Elitebook 2540P laptop with mainboard: LA-5251P REV 1.0
    It has a SIO with model: SMSC KBC1098
    I think both the EC firmware and the main Bios reside in a single Bios chip.
    Problem: KBC1098 is partially defective so that it does not generate ADP_En at Pin 75 and generates 8 amber blinks on the charging LED, indicating some wrong input.

    Idea: Now I need to modify the EC firmware so that KBC1098 ignores the wrong input conditions and always generates a high ADP_En and does not enter a failure state.

    Is it possible to modify the code of the EC firmware as described in my idea?
    If so, how can I do that?

    Thanks

    Bios Chip Dump:

    https://www.badcaps.net/filedata/fetch?id=1974054
    Last edited by caspian; 05-21-2024, 02:03 PM.
    Tags: None
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