![]() The standard was originally conceived as “AT Bus Attachment”, officially called AT Attachment and abbreviated as “ATA” because its main feature was a direct connection to the 16-bit ISA bus introduced by IBM. History and terminology of the IDE interface By the way, these units had the peculiarity that they were powered by MOLEX 4-pin connectors from the power supply instead of modern SATA connectors. Obviously, the motherboards had this 40-pin connector to be able to connect the cables, which went to the hard drives and optical drives in the same way as we now connect the SATA data cables. Unlike the Serial ATA standard and as its name indicates, the connectors work in parallel, which allowed more than one device to be connected in a single cable. Indeed, we are talking about that elongated interface with many connectors (39 or 40 depending on the device) that hard drives and optical drives of yesteryear had and whose cable was gray, flat and elongated with individually isolated pins.
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