How the Bus Works.

How the Bus Works.

One of the most brilliant ideas behind the personal computer is the expansion slot - connectors to insert new
circuit boards that connect to the rest of the PC via circuitry known as bus, or bus. The
expansion slots for transforming a personal computer so that it can pass the tasks ever
imagined by the designers of the machine. Inserting the right plate - usually called adapter plate, or
expansion - it is possible to increase the resolution and number of colors used by the video, turn your PC into a machine
that records and plays music, make it work with disk drives, printers, backup tapes and as host
peripherals that did not even exist when you bought the computer. Bus circuits are used also for
communicating with some peripherals - such as keyboard - not connected to an expansion board.

The advantages of the expansion bus are so obvious that one might think that all computers have this feature. In
Indeed, before the advent of the IBM PC, many computers had their fixed components, ie, could not be
changed. The designers, on their own, decided to produce the artwork, not imagining that anyone would want
add something to it.

When IBM introduced the first PC, she was smart enough to realize that they should create a computer
accept and expansions should also disclose all the necessary technical information to other companies
could develop expansion boards for the IBM PC. The result was the emergence of a slew of new
components that, since then, continue to push the boundaries of what can be done with a personal computer.

The bus became, next to the microprocessor, the most critical factor for performance and differentiation between
classes of computers. Trends to be adopted by the new buses will determine the future of the PC itself.

Source: Evolution of Computers