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What would happen if the CPU data-bus bit 2 is connected to the RAM data-bit 5 and CPU data-bus bit 5 is connected to RAM data bit 2? Assume the rest of the connections are all right – explain.

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Not much. Bits 2 and 5 will get swapped over when the CPU reads memory but also when it writes memory, so it cancels out. It will only make a difference if some other hardware device is also accessing the RAM and not swapping over those bits.

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