Extended Industry Standard Architecture

What is Extended Industry Standard Architecture (EISA)?

Definition and meaning of Extended Industry Standard Architecture

Extended Industry Standard Architecture (EISA) is a Bus structure that extends the Industry Standard Architecture (ISA) from sixteen bits to 32 bits. EISA was brought in 1988 through the Gang of Nine – a group of PC producers.

EISA turned into designed to compete with IBM’s Micro Channel Architecture (MCA) – a Patented sixteen and 32-Bit parallel Laptop bus for IBM’s PS/2 Computer Systems. EISA prolonged the superior generation (AT) bus architecture and facilitated bus sharing between a couple of primary processing gadgets (CPU).

EISA is likewise referred to as Extended ISA.

What Does Extended Industry Standard Architecture Mean?

The EISA bus is like minded with older ISA buses with eight-bit or 16-Bit facts paths. Two 32-bit statistics course slots are the identical width as one 16-bit ISA slot. However, EISA bus slots are deeper than 16-bit slots due to the fact 32-bit Circuit Board area connectors have lengthy Fingers deep inside the EISA slot that hook up with the 32-bit pins. The 16-bit Circuit board partially extends to the 16-bit pins with a shallow connection.

Enhanced 4 GB reminiscence prolonged EISA’s 32-bit bus market, however the MCA bus became more popular. Though expensive, EISA tailored without difficulty to older ISA circuit boards. Thus, EISA became on the whole used for high-stop Servers requiring heavy Bandwidth. Unlike MCA, EISA accepts IBM’s older XT sySTEM architecture and ISA circuit forums. EISA connectors are sixteen-bit superset connectors for ISA Device forums, presenting more indicators and Greater overall perFormance.

The major difference between MCA and EISA is that EISA/ISA buses are backward like minded. An EISA PC is compatible with older EISA/ISA expansion playing cards, however on.Ly MCA enlargement cards may be used by an MCA bus.

EISA has 32-bit direct Memory get admission to (DMA), critical processing uNit (CPU) and bus grasp devices. EISA also has progressed Records transfer fees (DTR) as much as 33 MB, automatic Configuration, Synchronous information Switch Protocol (SDTP) and a like minded structure for older ISA buses with eight or 16-bit Data paths.

Most EISA cards had been designed for commUnity Interface playing cards (NIC) or small Computer device interfaces (SCSI). EISA is likewise reachable via several non IBM-well suited PCs, inclusive of the HP 9000, MIPS MaGNUm, HP Alpha Server and SGI Indigo2.

Eventually, PCs required faster buses for higher overall performance. Faster growth playing cards, like LocalBus or Video Electronics Standards Association (VESA), have been added, and there was no longer an EISA card marketplace.

What does EISA stand for?

When we refer to EISA as an acronym of Extended Industry Standard Architecture, we mean that EISA is formed by taking the initial letters of each significant word in Extended Industry Standard Architecture. This process condenses the original phrase into a shorter, more manageable form while retaining its essential meaning. According to this definition, EISA stands for Extended Industry Standard Architecture.

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