8085 vs 8086: Key Microprocessor Differences

This article explores the differences between the 8085 and 8086 microprocessors. We’ll cover their architecture, programming instructions, and other key features.

8085 Microprocessor Overview

This section provides a concise overview of the 8085 microprocessor, including its architecture and programming aspects.

8086 Microprocessor Overview

Here, we offer a brief look at the 8086 microprocessor and its main functionalities.

8085 vs 8086: A Detailed Comparison

The following table highlights the core differences between the 8085 and 8086 microprocessors:

Feature8085 Microprocessor8086 Microprocessor
Data Width8-bit16-bit
Address Lines16-bit20-bit
Data Bus8-bit16-bit
Clock Speed3 MHz5, 8, or 10 MHz (versions)
Flags59
PipeliningNot SupportedSupported
Clock Cycle Duty Cycle50%33%
Memory SegmentationNot SupportedSupported
Transistor Count~6500~29000
Processor TypeAccumulator-basedGeneral-purpose register-based
Operating ModesNone (single mode)Minimum and Maximum modes
Number of ProcessorsSingle processorMultiple processors (external support)
Memory Capacity64 KB1 MB

In summary, the 8086 is a more advanced processor with a wider data bus, more addressable memory, and support for features like pipelining and memory segmentation. The 8085, on the other hand, is a simpler and less powerful processor.