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Baby AT motherboard.

The AT form factor is the first modern form factor to be widely used. AT (Advanced Technology) was released in 1984 by IBM. Unlike the PC and XT form factors that preceded it, AT became a widely used design as a result of the booming home computer market in the 1980s. IBM clones made at the time began using AT compatible designs, contributing to its popularity. In the 1990s many computers still used AT and its variants, but ATX has been the most popular standard since 1997. Image File history File links Please see the file description page for further information. ... The Baby AT is a computer motherboard form factor that is smaller than the older AT form factor. ... A tower case featuring a modern design. ... This article is about the computer case form factor. ... A microATX tower, borrowed from Newegg microATX (also known as µATX) form factor is a small motherboard size of 9. ... Mini-ITX is a motherboard form factor developed by VIA Technologies. ... The Baby AT is a computer motherboard form factor that is smaller than the older AT form factor. ... BTX (for Balanced Technology Extended) is a form factor for PC motherboards, originally slated to be the replacement for the aging ATX motherboard form factor in late 2004 and early 2005. ... ETX®, standing for Embedded Technology eXtended, computer-on-module (COM) is a highly integrated and compact (3. ... FlexATX is a PC motherboard form factor derived from ATX. It is the smallest of the ATX-based form factors. ... NLX is a form factor proposed by Intel and developed jointly with IBM, DEC, and other vendors for low profile, low cost, mass-marketed retail PCs. ... Image File history File links Download high-resolution version (1431x959, 518 KB) Baby AT Motherboard with an Intel 486DX CPU under the heatsink and fan. ... Image File history File links Download high-resolution version (1431x959, 518 KB) Baby AT Motherboard with an Intel 486DX CPU under the heatsink and fan. ... Form factor refers to the linear dimensions and configuration of a device as distinguished from other measures of size (for example Gigabytes; a measure of storage size): in computing, form factor is used to describe the size and format of PC motherboards (see AT, ATX, BTX), but also of hard... 1984 (MCMLXXXIV) was a leap year starting on Sunday of the Gregorian calendar. ... International Business Machines Corporation (known as IBM or Big Blue; NYSE: IBM) is a multinational computer technology corporation headquartered in Armonk, New York, USA. The company is one of the few information technology companies with a continuous history dating back to the 19th century. ... One of the first PCs from IBM - the IBM PC model 5150. ... This article is about the computer case form factor. ...

Design

Main article: Industry Standard Architecture

AT was not a very large technological jump from older form factors. The AT's largest advancement was its "tower" design and a remote power switch in the front. The AT power supply provided 192 watts, triple that of older form factors. This article or section does not cite its references or sources. ...

The AT motherboard is 12 inches (305 mm) which means it will not fit in "mini desktop" or "minitower cases". The board's size also means that it takes up space behind the drive bays making installation of new drives more difficult. The power connectors for AT motherboards are two nearly identical 6-pin cords. Unfortunately, the two power connectors it requires are not easily distinguishable, leading many people to damage their boards when they were misconnected. However, technicians need only remember the phrase "black wires together in the middle" or "red and red and you are dead" to prevent this. The two black wires on either connector must be plugged in back to back, creating a row of 4 black cords (out of the total 12) and a correct connection. This article or section does not adequately cite its references or sources. ... Full-height, 2 half-height, and 3. ...

Variants

In 1985 IBM introduced Baby AT'. Soon after all computer makers abandoned AT for the cheaper and smaller Baby AT. These motherboards have the same functionality as ATs but are 2" (51 mm) narrower and marginally longer. Although the Baby AT form factor is obsolete, a few computers are still using it, and modern PC cases are generally backwards compatible to fit Baby AT. 1985 (MCMLXXXV) was a common year starting on Tuesday of the Gregorian calendar. ... Apple Macintoshes like the iMac Core Duo are personal computers. ...

In 1995 Intel introduced ATX, a modern form factor which has quickly replaced older Baby AT computers. 1995 (MCMXCV) was a common year starting on Sunday of the Gregorian calendar. ... Intel Corporation (NASDAQ: INTC, SEHK: 4335), founded in 1968 as Integrated Electronics Corporation, is an American multinational corporation that is best known for designing and manufacturing microprocessors and specialized integrated circuits. ... This article is about the computer case form factor. ...

External links

• Motherboards of AT and Baby AT
• Baby AT Power Supply
• Baby AT Case
• Full AT Case
• Full AT Power Supply
• ATX Power Supply Links
• AT power supply connectors with pinouts