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Computing (FOLDOC) dictionary
Extended Industry-Standard Architecture
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architecture, standard (EISA) /eesa/ A bus standard for
IBM compatibles that extends the ISA bus architecture to
32 bits and allows more than one CPU to share the bus. The
bus mastering support is also enhanced to provide access to
4 GB of memory. Unlike MCA, EISA can accept older XT busarchitecture and ISA boards.
EISA was announced in late 1988 by compatible vendors as a
counter to IBM's MCA in its PS/2 series. Although
somewhat inferior to the MCA it became much more popular due
to the proprietary nature of MCA.