Difference between 8085 and 8086 Microprocessor

By Jaxson

Main Difference

The 8085 chip is littler than the 8086 microchip in connection to the quantity of information lines that are accessible. The 8085 has 8 bits of space accessible while the 8086 has 16 bits accessible. The clock speed in the 8085 microchips stays at 3 megahertz. Contingent upon the model of the 8086 microchip, the clock rate can be 5, 8 or 10 megahertz. In spite of the model of the processor, the clock rate of the 8086 is higher than the clock rate of the 8085. The way that the memory is composed of the processors is distinctive in light of the fact that the 8085 models don’t bolster memory division. The 8086 backings and just composes memory space utilizing the memory division process. The 8086 model additionally permits an outside processor to be utilized, yet it can keep running all alone. The 8085 does not permit the utilization of an extra outer processor and just capacities all alone. The principle contrasts between an 8085 and an 8086 microchip are the measure of the information lines, the clock speeds, the way the memory space is sorted out and the guideline line. These distinctions influence the way that the processors capacity and the way that they are utilized for various errands. The hugest distinction between the Intel 8085 and 8086 chip is that the 8085 is an 8-bit framework and the 8086 is a 16-bit framework. This distinction permits the 8086 frameworks to have a much bigger arrangement of operational guidelines and can make counts to more noteworthy spots. 8086 has 20 address lines and 16 information lines and backings HARVARD design when contrasted with 8085 which has 16 address lines and 8 information lines, so 8086 has a higher list and consequently getting to vast memory, likewise the working rate of 8086 is more noteworthy because of the nearness of direction line. 8085 microchip does not contain inbuilt memory, ADC, DAC though 8086 chip contains those extra components and consequently we don’t have to incorporate outer memory and therefore the circuit gets to be smaller. 8085 is an 8-bit microchip n it is second era chip and it is fabricated by NMOS innovation yet 8086 is a 16-bit microprocessor, 3rd era microchip and produced by HMOS innovation. In 8085 arithmetic operation of a whole number and decimal is conceivable however in 8086 arithmetic operations of whole number decimal and ASCII is additionally conceivable and size of 8085 is 8 bit and of 8086 is 16 bit.


It is an 8-bit chip delivered by Intel and presented in 1976. It is programming parallel good with the more-popular Intel 8080 with just two minor directions added to bolster its additional hinder and serial info/yield highlights. It may require less bolster hardware, permitting less difficult and less costly microcomputer frameworks to be manufactured. The “5” in the part number highlighted the way that the 8085 uses a solitary +5-volt (V) power supply by utilizing consumption mode transistors, instead of requiring the +5 V, −5 V, and +12 V supplies required by the 8080. This carried it up with the contending Z80, a well-known 8080-inferred CPU presented the prior year. These processors could be utilized as a part of PCs running the CP/M working framework. The 8085 is supplied in a 40-pin DIP bundle. To expand the capacities on the accessible pins, the 8085 uses a multiplexed address/information transport. Notwithstanding, an 8085 circuit requires an 8-bit address hook, so Intel produced a few bolster chips with a location lock worked in. These incorporate the 8755, with a location lock, 2 KB of EPROM and 16 I/O pins. The multiplexed address/information transport decreased the quantity of PCB tracks between the 8085 and such memory and I/O chips. Both the 8080 and the 8085 were obscured by the Zilog Z80 for desktop PCs, which assumed control a large portion of the CP/M PC market, and an offer of the blasting home-PC market in the right on time to-mid-1980s. The 8085 had a long life as a controller, doubtlessly on account of its inherent serial I/O and 5 organized interferes, seemingly microcontroller-like components that the Z80 CPU did not have. Once composed of such items as the DECtape controller and the VT102 video terminal in the late 1970s, the 8085 served for a new generation all through the lifetime of those items. This was normally more than the item life of desktop PCs.


Compilers for the 8086 families generally bolster two sorts of the pointer, close and far. Close pointers are 16-bit balances certainly connected with the project’s code or information section thus, can be utilized just inside parts of a system sufficiently little to fit in one portion. Far pointers are 32-bit segment: offset sets taking steps to 20-bit outer locations. A few compilers additionally bolster tremendous pointers, which resemble far pointers aside from that pointer number juggling on an enormous pointer regards it as a direct 20-bit pointer, while pointer number-crunching on a far pointer wraps around inside its 16-bit balance without touching the section part of the location. On a basic level, the location space of the x86 arrangement could have been reached out in later processors by expanding the movement esteem, the length of users acquired their sections from the working framework and did not make suppositions about the equality of various segment: offset pairs. The utilization of “colossal” pointers and comparable components were boundless and the level 32-bit tending to made conceivable with the 32-bit counterbalance registers in the 80386, in the long run, broadened the restricted tending to extend in a more broad manner.

Key Differences

  • The price of the 8086 processor is more.
  • Quite the opposite, the memory space isn’t segmented in 8085.

Video Explanation

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