Computer Hardware
Whenever you have a hardware resource conflict, it will more likely be an IRQ conflict rather than an i/o conflict because:

I/O addresses cannot conflict
software tends to mess up IRQs
software tends to correct I/O conflicts
there are a lot more I/O addresses than IRQs.
the BIOS sometimes has more of a problem controlling IRQs

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Computer Hardware
What is the most likely cause of an "FDD controller Failure" error message?

you did not set the jumper on the floppy drive to drive A
None of these
you forgot to flash CMOS
you installed the floppy disk drive cable backward
your computer's floppy drive is defective

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