bus was introduced in 1989 and was the PC industry's response to IBM's
MCA bus. This 32-bit bus is designed to provide a wider
data path. It is compatible with the ISA bus. The older 8/16-bit
ISA cards can be used in EISA expansion slots. With a "four lane" bus,
data could now be transferred at an even faster rate.
Although a sound design, EISA never became as popular as the MCA bus. Few
EISA expansion cards were developed. As CPU technology advanced, faster buses
were needed to match the high processing CPU speeds.