Microprocessor Architectures: 8085 and 8086
The chapter covers two seminal microprocessors: the 8085 and 8086, beginning with an overview of the 8085's architecture, its pin diagram, and its extensive instruction set. The text emphasizes the functionality of both microprocessors, detailing the 8086's advancements in terms of architecture, segmented memory, and enhanced instruction set, ultimately highlighting the evolution from 8-bit to 16-bit processing. Additionally, key differences between the 8085 and 8086 are meticulously examined, illustrating the significant leap in capabilities that shaped modern computing.
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What we have learnt
- The Intel 8085 microprocessor is an 8-bit architecture with a 16-bit address bus, capable of addressing up to 64KB of memory.
- The 8086 microprocessor represents a significant advancement with its 16-bit architecture and capability to access 1MB of memory via segmented addressing.
- The instruction set of the 8086 includes enhanced data manipulation capabilities, sophisticated addressing modes, and powerful string manipulation instructions, reflecting a leap from the 8085 capabilities.
Key Concepts
- -- Microprocessor Architecture
- The arrangement of the internal components of the microprocessor, which includes various units such as the ALU, accumulator, registers, and more.
- -- Instruction Set
- A collection of machine language commands understood by a microprocessor, which can be classified into categories like data transfer, arithmetic, and logical instructions.
- -- Segmented Memory
- A memory management scheme that divides memory into segments to allow a microprocessor to access more memory than its current register size can directly address, as utilized by the 8086.
- -- Flag Register
- A special register in the microprocessor that holds flags that provide information about the status of arithmetic or logical operations.
Additional Learning Materials
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