What is an Industry Standard Architecture Bus (ISA Bus)?

What does ISA Bus stand for?

An Industry Standard Architecture Bus (ISA bus) is a Laptop bus that permits additional enlargement cards to be connected to a Computer’s Motherboard. It is a preferred bus architecture for IBM compatibles. Introduced in 1981, the ISA bus cHanged into designed to support the Intel 8088 Microprocessor for IBM’s first-generation PC.

In the overdue Nineties the faster Peripheral thing Interconnect (PCI). Soon afterwards, use of the ISA bus started out to diminish, and maximum IBM motherboards had been designed with PCI Slots. Although there are still some motherboards being made with ISA slots, those are normally called the legacy bus motherboards.

What Does Industry Standard Architecture Bus Mean?

The ISA bus affords direct reminiscence get admission to the usage of a couple of Expansion Cards on a reminiscence channel allowing separate Interrupt Request Transactions for every card. Depending at the version, the ISA bus can help a Network card, additional Serial Ports, a Video Card and other Processors and architectures, together with:

• IBM PC with Intel 8088 microprocessor
• IBM AT with Intel 80286 processor (1984)
• Extended Industry Standard Architecture (1988)

The ISA bus first Protected synchronicity with the CPU cLock. It changed into later Upgraded to high-degree Buffering, which Interfaced the Chipsets with the CPU. Likewise, the ISA bus used bus gaining knowledge of, which without delay Accessed just the first 16 MB of main Memory.