| Short
for Extended Industry Standard Architecture, EISA, also known as
Extended ISA, is a standard first announced in September of 1988
for IBM and IBM compatible computers
to compete with the IBM MCA bus. The EISA
bus is found on Intel 80386,
80486 and early Pentium computers and was designed by nine competitors to compete with IBM's MCA bus. These competitors were
AST Research, Compaq, Epson, Hewlett Packard, NEC,
Olivetti, Tandy, WYSE, and Zenith Data
Systems. The EISA bus provided 32-bit slots at an 8.33
MHz cycle rate for the use with 386DX
or higher processors. In addition, the EISA can accommodate a 16-bit
ISA card in the first row.
Although the EISA bus is backwards compatible and not a proprietary
bus it never became widely used and is no longer found in
computers today.
Also see: Bus, ISA, MCA,
Motherboard definitions
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