Diagnostics BIOS

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A homebrew BIOS used to test various parts of cartridge systems. It includes improved/fixed versions of the tests found in the SNK BIOS along with many new ones to help indentify faults faster. A Z80 ROM, which is meant to be used in place of a game M1 ROM, can optionally be used to test the digital part of the sound system.

Sample images

  • Example of RAM error (data error in chip for lower byte)

    Example of RAM error (data error in chip for lower byte)

  • Example of Z80 error (lower address line problem from Z80 to RAM)

    Example of Z80 error (lower address line problem from Z80 to RAM)

  • Displayed at end of successful testing

    Displayed at end of successful testing

  • Interactive calendar test

    Interactive calendar test

  • Controller test

    Controller test

Homepage

http://smkdan.eludevisibility.org/neo/diag/

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