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<TD width=64>作 者</TD>
<TD width=233>shixian</TD>
<TD width=63>閱讀次數</TD>
<TD width=85>466</TD>
<TD width=63>回復次數</TD>
<TD width=85>8</TD></TR>
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<TD width=64>所屬欄目</TD>
<TD width=233>基礎應用與新手入門>> IT英語</TD>
<TD width=63>發表日期</TD>
<TD width=85>2006-9-26</TD>
<TD width=63>回復日期</TD>
<TD
width=85>2006-10-13</TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE>
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<DIV class=userInfoBox>積分：2575<BR>第二級</DIV>
<DIV class=userInfoBox>注冊時間<BR>2006-6-12</DIV></DIV></TD>
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<DIV class=TitleInfoBox align=right>發表時間：2006-9-26 8:39:30 樓主</DIV>
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<P align=center>MICROPROCESSOR AND MICROCOMPUTER <BR><BR></P>
<P>Microprocessor is a processor whose elements have been miniaturized
into one or a few integrated circuits．It is a semiconductor central
processing unit（CPU）and one of the principal components of the
microcomputer．The elements of the microprocessor are frequently contained
on a single chip or within the same package，but are sometimes distributed
over several separate chips．[1] In a microcomputer with a fixed
instruction set，the microprocessor consists of the arithmetic-logic unit
and the control logic unit．In a microcomputer with a micro programmed
instruction set，it contains an additional control-memory unit．[2]
<BR>Pentium And Power PC Evolution <BR>In this section，we provide a brief
overview of two computer families：the Intel Pentium and the IBM Power
PC．The Pentium represents the results of decades of design effort on
complex instruction set computers（CISCs）．It incorporates the sophisticated
design principles once found only on mainframes and supercomputers and
serves as an excellent example of CISC design．The Power PC is a direct
descendant of the first RISC system，the IBM 801，and is one of the most
powerful and best-designed RISC-based systems on the market．[3] <BR>1）The
Pentium <BR>One method of increasing the complexity of an integrated
circuit is simply to scale the chip down．[4] For example，if every line
etched into the silicon die could be shrunk in half，the same circuit could
be built in one -fourth the area．The evolution of dynamic memory
chips（DRAMs）follows this rule exactly．The original IBM PC used 16 KB
DRAMs．These were soon replaced with 64 Kchips，then 256 KB chips，and now 16
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