motherboard

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motherboard

[′məth·ər‚bȯrd]
(computer science)
A common pathway over which information is transmitted between the hardware devices (the central processing unit, memory, and each of the peripheral control units) in a microcomputer.

motherboard

(hardware)
(mobo) The main printed circuit board in an electronic device, particularly a computer, which may contain sockets that accept additional boards ("daughter-boards").

In a personal computer, the motherboard contains the bus, the microprocessor, and integrated circuits used for controlling any built-in peripherals such as the keyboard, text and graphics display, serial ports and parallel ports, joystick, and mouse interfaces.

motherboard

Also called the "system board," "main board" "base board" or "logic board," it is the primary printed circuit board in a computer or other electronic device. In a modern desktop computer, the motherboard contains the CPU and memory sockets as well as the chipset, which houses the control circuits for all the peripheral devices. It also has a PCI-Express slot for a high-end graphics card and PCI slots for additional peripherals. Laptop motherboards have no expansion slots for more peripherals.

Want to Sound Like a Cool Geek?
Every now and then, say "mobo" instead of motherboard. See CPU, chipset, PCI Express, PCI and controller.


PC Motherboard
This earlier Baby AT style motherboard required plug-in expansion cards for almost all the peripheral devices. The ISA slots are long gone, and the AGP slot was replaced with PCI-Express.







Expansion Cards
On earlier PCs, expansion cards were required for almost all peripheral devices except keyboard and mouse. Today, enthusiasts may plug in a faster graphics card, but most peripheral control circuits are already on the motherboard.







The Mother of All Motherboards
This is the front and back of the prototype of the first IBM PC motherboard in 1981. The chips are wired together on a "breadboard." (Images courtesy of IBM.)


The Mother of All Motherboards
This is the front and back of the prototype of the first IBM PC motherboard in 1981. The chips are wired together on a "breadboard." (Images courtesy of IBM.)
References in periodicals archive ?
The foreign securities house said the upgrade came in the wake of an anticipated increase of 10 percent in average earnings per share for companies listed on the main board in 2018,following an expected 10 percent increase in 2017.
The Listing Rules of the Main Board and GEM provide for all Listing Committee members to vacate office annually.
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THE FA are bracing themselves for an explosive meeting of their main board next week.
In this week's look at the structure of major North-East companies, we feature the main board of Newcastle's Barratt Developments, the biggest housebuilder in the UK and the third-biggest company in the North-East by stock market value.
The move involves changes to both the main board and the creation of an executive board, which will be based in Leeds.
Lancashire-born Mr Wall joined Pilkington in 1956 as assistant solicitor in the legal department, becoming a divisional director 10 years later and a main board director of what was then Pilkington Brothers in 1970.