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<html><head><title>饮水思源精华区</title><Content-type: text/html; charset=gb2312><link rel=stylesheet type=text/css href="bbsdl.css"></head><table cellspacing=0 class=title width=90%><th class=title align=left width=20%>饮水思源站</th><th class=title align=center width=60%>文章阅读</th><th class=title align=right width=20%>精华区离线浏览</th></tr></table><hr><table align=center cellspacing=1 class=doc><tr><td>发信人:&nbsp;fangf&nbsp;(方方),&nbsp;信区:&nbsp;DSP<br>标&nbsp;&nbsp;题:&nbsp;如&nbsp;何&nbsp;选&nbsp;择&nbsp;嵌&nbsp;入&nbsp;式&nbsp;微&nbsp;处&nbsp;理&nbsp;器&nbsp;(二)<br>发信站:&nbsp;饮水思源站&nbsp;(Sat&nbsp;Jun&nbsp;&nbsp;5&nbsp;10:42:02&nbsp;1999)&nbsp;,&nbsp;站内信件<br>调&nbsp;查&nbsp;上&nbsp;市&nbsp;的CPU&nbsp;供&nbsp;应&nbsp;商&nbsp;<br><br>----&nbsp;某&nbsp;些&nbsp;公&nbsp;司&nbsp;如Motorola、&nbsp;Intel&nbsp;很&nbsp;有&nbsp;名&nbsp;气，&nbsp;而&nbsp;有&nbsp;一&nbsp;些&nbsp;小&nbsp;的&nbsp;公<br>&nbsp;司&nbsp;如QED（Santa&nbsp;Clara&nbsp;.&nbsp;CA）&nbsp;虽&nbsp;然&nbsp;名&nbsp;气&nbsp;很&nbsp;小，&nbsp;但&nbsp;也&nbsp;生&nbsp;产&nbsp;很&nbsp;优&nbsp;秀<br>&nbsp;的&nbsp;微&nbsp;处&nbsp;理&nbsp;器。&nbsp;另&nbsp;外，&nbsp;有&nbsp;一&nbsp;些&nbsp;公&nbsp;司，&nbsp;如ARM、MIPS&nbsp;等，&nbsp;只&nbsp;设&nbsp;计&nbsp;而<br>&nbsp;并&nbsp;不&nbsp;生&nbsp;产CPU，&nbsp;他&nbsp;们&nbsp;把&nbsp;生&nbsp;产&nbsp;权&nbsp;授&nbsp;予&nbsp;世&nbsp;界&nbsp;各&nbsp;地&nbsp;的&nbsp;半&nbsp;导&nbsp;体&nbsp;制&nbsp;造<br>&nbsp;商。&nbsp;<br><br>----&nbsp;一&nbsp;些&nbsp;半&nbsp;导&nbsp;体&nbsp;厂&nbsp;商&nbsp;生&nbsp;产&nbsp;的CPU&nbsp;不&nbsp;单&nbsp;纯&nbsp;以&nbsp;传&nbsp;统&nbsp;的&nbsp;封&nbsp;装&nbsp;形&nbsp;式<br>&nbsp;出&nbsp;售，&nbsp;而&nbsp;是&nbsp;以&nbsp;一&nbsp;种&nbsp;软&nbsp;件&nbsp;模&nbsp;型&nbsp;库&nbsp;方&nbsp;式&nbsp;向&nbsp;用&nbsp;户&nbsp;供&nbsp;应ASIC&nbsp;设&nbsp;计。&nbsp;<br><br>----&nbsp;截&nbsp;至1997&nbsp;年&nbsp;底，&nbsp;所&nbsp;有&nbsp;各&nbsp;种&nbsp;形&nbsp;式&nbsp;的32&nbsp;位&nbsp;嵌&nbsp;入&nbsp;式&nbsp;微&nbsp;处&nbsp;理&nbsp;器&nbsp;<br>的&nbsp;销&nbsp;售&nbsp;额&nbsp;超&nbsp;过1.8&nbsp;亿&nbsp;美&nbsp;元，&nbsp;如&nbsp;果&nbsp;加&nbsp;上PC、&nbsp;苹&nbsp;果&nbsp;机&nbsp;和&nbsp;工&nbsp;作&nbsp;站，<br>&nbsp;那&nbsp;么，&nbsp;几&nbsp;乎&nbsp;每&nbsp;一&nbsp;位&nbsp;生&nbsp;活&nbsp;在&nbsp;美&nbsp;国&nbsp;的&nbsp;人&nbsp;都&nbsp;拥&nbsp;有&nbsp;一&nbsp;颗32&nbsp;位&nbsp;微&nbsp;处<br>&nbsp;理&nbsp;器。&nbsp;<br><br>----&nbsp;Motorola&nbsp;传&nbsp;统&nbsp;的68K&nbsp;结&nbsp;构&nbsp;仍&nbsp;是32&nbsp;位CPU&nbsp;的&nbsp;主&nbsp;流，&nbsp;虽&nbsp;然&nbsp;它&nbsp;起&nbsp;<br>源&nbsp;于80&nbsp;年&nbsp;代&nbsp;初，&nbsp;但&nbsp;在1997&nbsp;年&nbsp;依&nbsp;然&nbsp;销&nbsp;售&nbsp;了8000&nbsp;万&nbsp;个，&nbsp;并&nbsp;基&nbsp;本&nbsp;<br>上&nbsp;是&nbsp;传&nbsp;统680xx&nbsp;芯&nbsp;片（00、20、40K），&nbsp;另&nbsp;外&nbsp;就&nbsp;是683xx（60、02、32、<br>28K）&nbsp;以&nbsp;及Coldfire。&nbsp;<br><br>----&nbsp;68K&nbsp;嵌&nbsp;入&nbsp;式&nbsp;微&nbsp;处&nbsp;理&nbsp;器&nbsp;最&nbsp;大&nbsp;的&nbsp;挑&nbsp;战&nbsp;者&nbsp;是MIPS&nbsp;的&nbsp;授&nbsp;权&nbsp;制&nbsp;造&nbsp;<br>商。&nbsp;众&nbsp;所&nbsp;周&nbsp;知，MIPS&nbsp;属&nbsp;于SGI&nbsp;公&nbsp;司，&nbsp;而MIPS&nbsp;主&nbsp;要&nbsp;做&nbsp;嵌&nbsp;入&nbsp;式&nbsp;系&nbsp;统<br>，SGI&nbsp;工&nbsp;作&nbsp;站&nbsp;只&nbsp;是MIPS&nbsp;芯&nbsp;片&nbsp;销&nbsp;售&nbsp;额&nbsp;的1&nbsp;％；&nbsp;紧&nbsp;跟&nbsp;在MIPS&nbsp;后&nbsp;的&nbsp;另<br>&nbsp;一&nbsp;个RISC&nbsp;芯&nbsp;片&nbsp;制&nbsp;造&nbsp;商&nbsp;是Hitachi&nbsp;的SH，SH&nbsp;主&nbsp;要&nbsp;在&nbsp;远&nbsp;东&nbsp;销&nbsp;售（&nbsp;日<br>&nbsp;本&nbsp;最&nbsp;多），&nbsp;北&nbsp;美&nbsp;则&nbsp;很&nbsp;少&nbsp;有&nbsp;人&nbsp;使&nbsp;用。&nbsp;<br><br>----&nbsp;ARM&nbsp;是&nbsp;另&nbsp;外&nbsp;一&nbsp;种&nbsp;近&nbsp;年&nbsp;来&nbsp;在&nbsp;嵌&nbsp;入&nbsp;式&nbsp;系&nbsp;统&nbsp;有&nbsp;影&nbsp;响&nbsp;力&nbsp;的&nbsp;微<br>&nbsp;处&nbsp;理&nbsp;器&nbsp;制&nbsp;造&nbsp;商，ARM&nbsp;的&nbsp;设&nbsp;计&nbsp;非&nbsp;常&nbsp;适&nbsp;合&nbsp;于&nbsp;小&nbsp;的&nbsp;电&nbsp;源&nbsp;供&nbsp;电&nbsp;系&nbsp;<br>统。Apple&nbsp;在Newton&nbsp;手&nbsp;持&nbsp;计&nbsp;算&nbsp;机&nbsp;中&nbsp;使&nbsp;用ARM，&nbsp;另&nbsp;外&nbsp;有&nbsp;几&nbsp;款&nbsp;数&nbsp;字&nbsp;<br>无&nbsp;线&nbsp;电&nbsp;话&nbsp;也&nbsp;在&nbsp;使&nbsp;用ARM。&nbsp;<br><br>----&nbsp;除MIPS、SH&nbsp;和ARM&nbsp;之&nbsp;外，&nbsp;就&nbsp;数Power&nbsp;PC&nbsp;和X86&nbsp;了。&nbsp;这&nbsp;两&nbsp;款&nbsp;微&nbsp;处<br>&nbsp;理&nbsp;器&nbsp;在&nbsp;桌&nbsp;面&nbsp;系&nbsp;统&nbsp;用&nbsp;量&nbsp;极&nbsp;大，&nbsp;但&nbsp;在&nbsp;嵌&nbsp;入&nbsp;式&nbsp;系&nbsp;统&nbsp;中&nbsp;的&nbsp;影&nbsp;响&nbsp;<br>却&nbsp;不&nbsp;够&nbsp;大。1997&nbsp;年，Intel、AMD&nbsp;及&nbsp;其&nbsp;他X86&nbsp;兼&nbsp;容&nbsp;厂&nbsp;商&nbsp;共&nbsp;生&nbsp;产&nbsp;了<br>900&nbsp;万&nbsp;个X86&nbsp;嵌&nbsp;入&nbsp;式CPU。&nbsp;实&nbsp;际&nbsp;上，&nbsp;在&nbsp;嵌&nbsp;入&nbsp;式X86&nbsp;CPU&nbsp;方&nbsp;面，AMD&nbsp;<br>的&nbsp;工&nbsp;作&nbsp;远&nbsp;比Intel&nbsp;多，&nbsp;如AMD186/188&nbsp;系&nbsp;统&nbsp;和AMD&nbsp;基&nbsp;于386、486Elan<br>&nbsp;系&nbsp;统（&nbsp;把&nbsp;整&nbsp;个PC&nbsp;基&nbsp;成&nbsp;在&nbsp;单&nbsp;个&nbsp;芯&nbsp;片&nbsp;上）。&nbsp;<br><br>--<br>-----------------------------------------------<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;因一个词的力量<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;我重新开始生活<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;我生来就认识你<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;要把你称作<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;自由<br><br>※&nbsp;来源:·饮水思源站&nbsp;bbs.sjtu.edu.cn·[FROM:&nbsp;202.120.8.11]<br></tr></table><br><caption 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