Some Examples


* If the floppy controller test fails (e.g. because the controller has been removed), the diagnostics will illogically go on to do the floppy read test.

* If the timer chip test fails, the diagnostics will illogically go on to test RAM. That is illogical, because the timer chip is critical to RAM operation (part of RAM refresh circuitry).

* If the DMA chip test fails, the diagnostics will illogically go on to test RAM. That is illogical, because the DMA chip is critical to RAM operation (part of RAM refresh circuitry).


Above are just a few.
I believe that the diagnostics author intended the diagnostics to only be used by PC technicians, people who would know component dependencies.