What will happen if you reverse the connection of IDE?
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You can reverse a 40 wire 40 pin ATA 66 IDE cable no problem. You can not reverse an 80 wire 40 pin ATA 100/133 IDE cable. I tried and it didn't work. The two drive connectors are wired different so that cable select will work. If you try to connect the master drive connector to the motherboard you will get a BIOS error message

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Well, this code would box the whole body of an html document. by using the relative value for position, you are telling it to position relative to its normal position, which the top left corner is at (0,0). by using left: 50px, you are telling the box to set the left margin  edge to 50px and by using top: 50px, you are telling it to set the top margin edge to 50px. by doing this shifting, the top left corner of the box, which is at (0,0) would be positioned at (50,50)