Friday, July 31, 2009

Brief history of 80X86 family

Evolution from 8080/8085 to 8086

Intel Corporation introduced 16-bit microprocessor called the 8086 in 1978.This processor is the major improvement from the previous generation of the 8080/8085 series.
The differences between 8086 and 8085 is that 8086 is a 16-bit as described just now while the 8085 is a 8-bit processor.Therefore,8086 works faster than 8085 because it can process 16 bits at a time if compared to 8085 microprocessor.
Another thing is that, 8086 was a pipelined processor in which the data and address buses are busy transferring data while the CPU is processing information thus increasing the effectiveness in producing power.

Evolution from 8086 to 8088

8086 is a microprocessor with 16 bit data bus internally and externally.Even though this microprocessor marked a great improvement over the previous generation of the microprocessor however, the printed board with 16 bit data bus was much more ex-orbitant.Thus,many were reluctant to use the 8086.Plus,most of the peripherals were designed about 8 bit microprocessor which cost lower during that time.Therefore, 8088 was introduced to replace the 8086 which shares similarity with 8086 but externally 8 bits data bus only




















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