Industry Standard Architecture |Industry Standard Architecture|
One 8-bit and five 16-bit ISA slots on a motherboard |Superseded
by||PCI (1993)| |Width in bits||8 or 16| |Number of devices||Up
to 6 devices| Industry Standard Architecture (ISA) is a computer
bus standard for IBM PC compatible computers introduced with the
IBM Personal Computer to support its Intel 8088 microprocessor's
8-bit external data bus and extended to 16 bits for the IBM
Personal Computer/AT's Intel 80286 processor. The ISA bus was
further extended for use with 32-bit processors as Extended
Industry Standard Architecture (EISA). For general desktop
computer use it has been supplanted by later buses such as IBM
Micro Channel, VESA Local Bus, Peripheral Component Interconnect
and other successors. A derivative of the AT bus structure is
still used in the PC/104 bus, and internally within Super I/O
chips. The ISA bus was developed by a team led by Mark Dean at
IBM as part of the IBM PC project in 1981. It originated as an
8-bit system. The