What is an ISA in computers?

Question

What is an ISA in computers?

Answer 1

ISA

(Pronounced as separate letters or as eye-sa). Short for Industry Standard Architecture bus, the bus architecture used in the IBM PC/XT and PC/AT. The AT version of the bus is called the AT bus and became a de facto industry standard. Starting in the early 90s, ISA began to be replaced by the PCI local bus architecture.



EISA

Acronym for Extended Industry Standard Architecture, a bus architecture designed for PCs using an Intel 80386, 80486, or Pentium microprocessor. EISA buses are 32 bits wide and support multiprocessing.



PCI

Short for Peripheral Component Interconnect, a local bus standard developed by Intel Corporation. Most modern PCs include a PCI bus in addition to a more general ISA expansion bus. PCI is also used on newer versions of the Macintosh computer.

PCI is a 64-bit bus, though it is usually implemented as a 32-bit bus. It can run at clock speeds of 33 or 66 MHz. At 32 bits and 33 MHz, it yields a throughput rate of 133 MBps. Also see PCI-X and PCI Express.

Although it was developed by Intel, PCI is not tied to any particular family of microprocessors.



In todays computers ISA and EISA is completely replaced by PCI.

Answer 2

ISA is the Industry Standard Architecture bus originally developed by IBM and published in 1981. This provided the first standard whereby any manufacturer could provide an add-on card to extend the capabilities of a PC. The original bus was 8-bit but was replaced by a 16-bit architecture in the mid 1980s. The ISA bus survived into the early 1990s when it was finally displaced by the PCI bus. http://www.celtnet.org.uk/info/motherboard.html

Answer 3

Industry Standard Architecture bus on the original IBM PC.

Answer 4

Industry STandard architecture. its one of the oldest ways to upgrade a computer. they are found in older computers and their are 2 types. there's the 8 bit type (which is small) and the 16 bit type (which is bigger)