The Evolution Of The Microprocessor

2619 words - 11 pages

Intro Sample...



Only once in a lifetime will a new invention come about to touch every aspect

of our lives. Such a device that changes the way we work, live, and play is a special

one, indeed. The Microprocessor has been around since 1971 years, but in the last few

years it has changed the American calculators to video games and computers (Givone

1). Many microprocessors have been manufactured for all sorts of products; some

have succeeded and some have not. This paper will discuss the evolution and history

of the most prominent 16 and 32 bit microprocessors in the microcomputer and how

they are similar to and different from each other.

Because microprocessors are a subject... View More »

Body Sample...


The 9900 series microprocessors runs with

64K memory and besides the fact that the 9900 is a 16-bit microprocessor, only 15 of

the address memory circuits are in use (Titus, 179). The 16th address is used for the

computer to distinguish between word and data functions (Titus, 179. The 9900 series

microprocessors runs from 300 nanoseconds to 500 ns from 2MHz to 3.3MHz and

even some variations of the original microprocessor where made to go up to 4MHz

(Avtar, 115).

The next microprocessor that will be discussed is the LSI-11 which was pro-

duced from the structural plans of the PDP-11 minicomputer family. There are three

microprocessors in the LSI-11 family they are the LSI-11, LSI-11/2, and the much im-

proved over the others is the LSI-11/32 (Titus, 131). The big difference between the

LSI-11 family of microprocessors and other similar microprocessors of its kind is they

have the instruction codes of a microcomputer but since the LSI-11 microprocessor

originated from the PDP-11 family it is a multi-microprocessor (Avtar, 207). The fact

that the LSI-11 microprocessor is a multi-microprocessor means that many other mi-

croprocessors are used in conjunction with the LSI-11 to function properly (Avtar,

207). The LSI-11 microprocessor has a direct processing speed of 16-bit word and 7-

bit data, however the improved LSI-11/22 can directly process 64-bit data (Titus, 131).

The average time that the LSI-11 and LSI-11/2 process at are ...

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