1-2-四、System board

四、System board
The System board is also known as the motherboard.The system board is the communiactions
medium for the entire computer system.Every component of the system unit connects to the
system board.It acts as a data path allowing the various components to communicate with one
another. Extemal devices such as the keyboard, mouse, and monitor could not communicate
with the system unit without the system board.
On a desktop computer, the system board is located at the bottom of the system unit or
along one side.It is a large flat circuit board covered with a varitety of different
electronic components including sockets,slots,and bus lines(See Figure 1-9).
(1)Sockets provide a connection point for small specialized electronic parts called chips.
Chips consist of tiny circuit boards etched onto squares of sandlike material called
silicon chip,semiconductor,or integrated circuit.Chips are mounted on carrier packages (See
Figure 1-10).These packages either plug directly into sockets on the system board or onto
cards that are then plugged into slots on the system board.Sockets are used to connect the
system board to a variety of different types of chips, including microprocessor and memory
chips.
(2)Slots provide a connection point for speciallized cards ofr circuit boards.These cards
provide expansion capability for a computer system.For example,a modem card plugs into a
slot on the system board to provide a connection to the Internet.
(3)Connecting lines called bus lines provide pathways that support commuication among the
various electronic components that are either located on the system board or attached to
the system board.
Notebook,tablet PC,and handheld system boards are smaller thatn desktop system
boards.However,they perform the same functions as desktop system boards.

四、System boardThe System board is also known as the motherboard.
四、系統板系統板也被稱爲主板。
The system board is the communiactions medium for the entire computer system.
系統板是整個計算機系統的交流介質。
Every component of the system unit connects to the system board.
系統單元的每一個組件鏈接到系統板。
It acts as a data path allowing the various components to communicate with one another.
它充當數據路徑，容許各個組件相互通訊。
Extemal devices such as the keyboard, mouse, and monitor could not communicate with the system unit without the system board.
鍵盤、鼠標和監視器等外部設備沒有系統板就沒法與系統單元通訊。
On a desktop computer, the system board is located at the bottom of the system unit or along one side.
在臺式計算機上，系統板位於系統單元的底部或沿一側。
It is a large flat circuit board covered with a varitety of different electronic components including sockets,slots,and bus lines(See Figure 1-9).
它是一個大的扁平電路板，上面覆蓋着不一樣的電子元件，包括插座、插槽和母線（見圖1-9）。
(1)Sockets provide a connection point for small specialized electronic parts called chips.
（1）插座爲稱爲芯片的小型專用電子部件提供了一個鏈接點。
Chips consist of tiny circuit boards etched onto squares of sandlike material called silicon chip,semiconductor,or integrated circuit.
芯片由微小的電路板組成，這些電路板被蝕刻在被稱爲硅片、半導體或集成電路的沙狀材料上。
Chips are mounted on carrier packages (See Figure 1-10).
芯片安裝在載波包上（見圖1-10）。
These packages either plug directly into sockets on the system board or onto cards that are then plugged into slots on the system board.
這些軟件包要麼直接插入系統板上的插座，要麼插入到卡上，而後插入系統板上的插槽。
Sockets are used to connect the system board to a variety of different types of chips, including microprocessor and memory chips.
套接字用於將系統板鏈接到各類不一樣類型的芯片，包括微處理器和存儲器芯片。
(2)Slots provide a connection point for speciallized cards ofr circuit boards.
（2）插槽爲電路板專用卡提供鏈接點。
These cards provide expansion capability for a computer system.
這些卡爲計算機系統提供擴展能力。
For example,a modem card plugs into a slot on the system board to provide a connection to the Internet.
例如，調制解調器卡插入系統板上的插槽以提供與Internet的鏈接。
(3)Connecting lines called bus lines provide pathways that support commuication among the various electronic components that are either located on the system board or attached to the system board.
（3）稱爲總線線路的鏈接線提供了支持位於系統板上或鏈接到系統板上的各類電子元件之間的通訊的通路。
Notebook,tablet PC,and handheld system boards are smaller thatn desktop system boards.
筆記本、平板電腦和手持系統板較小。
However,they perform the same functions as desktop system boards.
可是，它們的功能與桌面系統板相同。

四、 主板
主板也叫母版。主板是整個計算機系統的通訊媒介。系統部件中的每一個部件都連向主板。它的做用就像數據通路同樣，容許各個部件之間相互通訊。外部設備，如鍵盤、鼠標和監視器沒有主板也不能與系統部件通訊。
臺式計算機的主板是在系統部件底部或在一側。它是一塊大的電路板，上面佈滿各類電子部件，包括插座、插槽和總線，如圖1-9所示。
（1） 插座是稱爲芯片的小型專用電子部件的鏈接點。芯片是由蝕刻在像沙子同樣稱爲硅材料的方形薄片上的電路板組成的。這些電路板可能比你的指尖還小。芯片也可稱爲硅片、半導體器件或集成電路。芯片安裝在承載插件內（見圖1-10）。這些插件能夠直接插入主板的插座上或放在卡上，而後在將這些卡插到主板的插槽上。插座用於將主板與不一樣類型的芯片，包括微處理器和存儲器芯片鏈接起來。
（2） 插槽是專用卡或電路板的鏈接點。這些卡爲計算機系統提供擴展功能。例如調制解調器卡插入主板的插槽中，能夠與因特網鏈接。
（3） 鏈接線，又稱爲總線，是鏈接各個電子部件之間的通訊通路，這些電子部件安裝在主板或附着在主板上。
筆記本計算機、平板電腦和手持PC的主板比臺式機的小，但他們實現的功能和臺式機主板同樣。