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主板规格
BTX是英特尔提出的新型主百板架构Balanced Technology Extended的简称，是ATX结构的替代者，这类似于前几年ATX取代AT和Baby AT一样。革度命性的改变是新的BTX规格能够在不牺牲性能的前提下做到最小的体积。新架构对接口、总线、设备将有新的要求。重要的是目前所有的杂乱无章，接线凌乱，充满噪音的PC机将问很快过时。当然答，新架构仍然提供某种程度的向后兼容，以便实现技术革命的顺利过渡。 BTX具有如下特点：支持Low-profile，也即窄板设计，系统结构将更加版紧凑； 针对散热和气流的运动，对主板的线路布局进行了优化设计； 主板的安装将更加简便，机械性能也将经过最优权化设计。
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APPENDIX A
Icons
This appendix presents a recommended set of standard icons that can be used for connectors on a personal computer. A set of icons must be added to any external connector on a PC 99 system. And the same icons also should be added to any cable connectors that plug into the PC. (Icons are not required for peripherals or the peripheral end of the cable.)
Although no specific types of icons are required, you can base your icons either on existing vendor designs or on the designs shown in this appendix. Files that contain art for these icons, plus alternative designs from Hewlett-Packard, are available at http://www.microsoft.com/hwdev/desguid/icons.htm.
For PC cases and cable-plug housings, the icon can be molded into the plastic. Icons printed on perma¬nent labels are also acceptable.
PC 99 does not specifically require or recommend color coding of connectors and other cable markings, but the PC designer is encouraged to implement color coding in order to enhance user accessibility.
Connector Icons
Suggested icons Description
Expansion Bus/Docking Station
Gameport/Joystick
Headphone
Keyboard
Continued
Connector Icons (continued)
Suggested icons Description
Microphone
Monaural/Stereo In
Monaural/Stereo Out
Monitor
Mouse
Network/Thicknet+Twisted
Parallel /Printer
SCSI
Serial Port
Serial Port 1
Serial Port 2
Telephone Line
Telephone Set
USB
Note: A standard icon for IEEE 1394 is not yet available.
我也是这样，不过只要小圈一直再转就没事多等一会就好啦我的已经重置完了
AT主板你就不用管咯，你zhidao想买都不一定买的到，N年前的东西了。
Btx主板同上。
现在4年以内的主板基本回都是atx、matx，最近新出的凌动板（atom）基本都是itx。
家用省钱选matx（板载显卡），想功能全不带显卡选atx。想组件htpc可考虑答itx。
不知道这么说你懂不懂。
再不懂，你就需要恶补一下电脑知识了，偶也没办法了。