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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0000:  The Start of the PC
      9  IV  PC Technology Evolution

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IV  PC Technology Evolution
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PS2

Personal computer sales that were generated mostly from companies other than IBM skyrocketed.

In 1986, Compaq bested IBM by being the first company to release a PC based on the 386. One year later, IBM responded to the ‘clone invasion’ by releasing a new computer line-up, known as the Personal System 2 or PS/2 for short.

This new line of computers hosted an array of innovations including a new and completely incompatible method of accepting expansion cards. This new expansion bus was known as Micro Channel Architecture (MCA). IBM welcomed its competitors to use MCA, by paying a 'mere' dollar per slot for every computer made. Nobody was going to pay that, even if it was a 32-bit data bus.

Figure 5: The MCA card above looks very similar to today’s PCI card. The plastic tab on the card is the MCA clue.

 


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