Types of Buses

Types of Buses:
 Since the introduction  of the first PC many I/O buses have been introduced. The season is simple faster I/O speeds are necessary for latter system performance. This need for higher performance involves these main areas.

1. Faster cups
2. Increasing software demands
3. Greater multimedia Requirement

Each of area requires the I/O bus to be as fast as possible.

ISA BUS:

ISA which is an deviation for industry standard architecture is the bus architecture that was introduced as an 8bit bus with the original IBM PC in 1981. It was latter expended to 16bit with IBM PC/at in 1984. ISA is basic of the primary architecture used in vast modern personal computer  and the primary architecture used in vast majority of PC  system  on the market today. It might seam amazing that such a presumably antiquated architecture is used in today high performance system bur this is two for season of reliability affordability and compatibility plus this old bus is still faster than many of the peripherals we connects to its.

THE 8BIT ISA BUS:

This bus architecture is used in the original IBM PC computer and was neatened for a number of year in later systems. Although virtually non existent in new system today this architecture still exists in hundreds of thousand of PC system in field.
The dimensions of 8bit ISA adapter cards are as follows 4.2 inches (106.8non)   high. 13.13inches (333.5mm) long. 0.5inch (12.7mm) wide.

THE 16BIT ISA BUS:

IBM three a bombshell on introduction the At with the 186 for censor in 1984 this processor had a 16bit data bus which means communication between the processor and the mother board as well as memory would now be 16bit wide instead of only 8.although this processor could have been installed on a mother board with only an 8bit I/O bus that would have meant a uge specific the performance of any adapter cards or other device installed of the.
The dimensions of a typical at expansion 408 inches (121.92mm) high 13.13inches (333.5mm) long 0.5inches(12.7mm) wide.

MCA (THE MICRO CHANNEL BUS):

The introduction of 32bit chips meant that the ISA buses could not handle the power of another new generation of cup the 386 chips could transfer 32bit of data at a time but the ISA bus can handle a maximum  of only 16bit rather then extend the  ISA bus again IBM decided to build a new bus the result was the Mac bus-man (ab activation for micro channel architecture ) is completely different from  the ISA bus and was technology superior in every way.

THE EISA BUS:

EISA is alleviation for extended industry standard architecture. This standard was announced in September 1988 as response to IBM introduction of Mac bus more3 specifically of the way that IBM wanted to handle licensing the Mac bus. Vendor did not feel of lighted to pay retroactive royalties on the ISA bus so they turned their backs on IBM and created their own buses.

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