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keith

keith

Amateur Electronics Design Engineer and Hacker

  • Commodore Amiga Related

    Building a replacement Amiga 500 power supply

    by keith 12 months ago
    by keith 12 months ago

    Intro If you’re into retro computing, you probably know the Commodore Amiga 500—a beloved classic …

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  • Commodore Amiga RelatedPAL REing

    Validating my dataflyer BUSS PAL replacement GAL

    by keith February 2, 2025
    by keith February 2, 2025

    As some of you that have been following my reverse engineering efforts over the last …

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  • Uncategorized

    Recapping a Samsung 204B monitor

    by keith October 1, 2024
    by keith October 1, 2024

    In September 2006, I bought a Samsung 204B SyncMaster monitor for $320 plus tax. It …

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  • Commodore Amiga Related

    Amiga QB Extract recently updated

    by keith October 1, 2024
    by keith October 1, 2024

    There was a HDD backup utility for the Commodore Amiga called Quarterback, part of a …

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  • Oscilloscopes and Logic Analyzers

    Couple hi-res images of 16902A mainboard

    by keith October 9, 2023
    by keith October 9, 2023

    I just recently added another HP/Agilent logic analyzer to my collection. This time it is …

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  • Oscilloscopes and Logic Analyzers

    Agilent Logic Analyzer cable teardown photos

    by keith November 13, 2022
    by keith November 13, 2022

    So for today ladies and gentlemen, I present a teardown of an HP/Agilent logic analyzer …

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  • PAL REing

    Creating a timeline of events

    by keith October 13, 2022
    by keith October 13, 2022

    It’s often useful when trying to understand, debug, or reverse engineer a system to put …

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  • PAL REing

    Identify PAL inputs and outputs

    by keith September 1, 2022
    by keith September 1, 2022

    In order to properly reverse engineer a PAL, you need to correctly identify which pins …

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  • PAL REing

    Understand the system

    by keith August 19, 2022
    by keith August 19, 2022

    Of all of the different techniques this one may be the simplest but also the …

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  • PAL REing

    Why simply “dumping” a PAL isn’t always possible?

    by keith August 16, 2022
    by keith August 16, 2022

    Contents Rom Dumping Dumping ROMs is a pretty common practice in the space of reverse …

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