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

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

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

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

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