40-pin strip
wires, typically 18 inches long that connect from one end of the drive
to reserved 40-pin blocks on the motherboard are the carriers of information
to and fro from the memory, the processor, and the disk drives. A single
red coloured wire at one end of the strip helps in determining which way
to install these wires onto the motherboard and the drives. Nowadays, they
are designed specifically so that it is virtually impossible to slide them
into place the wrong way. Different other sets of wires, e.g. parallel
ports, serial ports, and keyboard connectors are responsible for creating
a channel of communication from external devices to specific circuitry
on the motherboard. Older system made it mandatory for data wires from
the external devices to connect directly onto the expansion cards. But
nowadays, wires can be connected to mounting brackets fitted at the back
of the computer so the external devices can be just plugged in accordingly.
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