Skip to main content

Features of 8086 Microprocessor

Features of 8086 Microprocessor

As discussed in the previous chapters, the 8085 microprocessor is an 8-bit microprocessor. It was generally used in small-scale industrial applications to control few operations. The limitations of the 8085 microprocessor are as follows.

(1) Low speed of execution.
(ii) Low memory addressing capability.
(ii) A limited number of general purpose registers.
(iv) Less powerful instruction set.

A 16-bit microprocessor 8086 was introduced by lntel in 1978. The 8086 microprocessor has many powerful and high-speed computational resources, The 8086 the microprocessor also has a much powerful instruction set along with the architectural developments. This provides a programming flexibility and improvement in speed.

Features of 8086 Microprocessor
  • The 8086 microprocessor has 16-bit data bus. It can read data from or write data to me and V'O ports either 16-bit or 8-bits at a time.
  • The 8086 microprocessor has 20-bit address bus. It can address any one of 20 (1.048,576) memory locations. Each of the 220 (IM) memory address of the 8086 represents byte wide location. Sixteen-bit words will be stored in two consecutive memory locations.
  • The 8086 microprocessors can perform a bit, byte, word and string with arithmetic and logical operations including multiply and divide.
  • The 8086 microprocessor has two operating modes : (i) Minimum mode and (ii) Maximum mode.
  • The 8086 microprocessor supports multiprogramming means that the code for two or more processes are there in memory at the same time and is executed in a time-multiplexed way.
  • The pipelining concepts are used in the 8086 microprocessor. The 8086 microprocessor fetches.

Popular posts from this blog

Limitations of Terzaghi Theory

Limitations of Terzaghi Theory The value of the coefficient of consolidation has been assumed to be constant.  The distance d of the drainage path cannot be measured accurately in the field. The thickness of the deposit is generally variable, and an average value has to be estimated.  There is sometimes difficulty 1n locating the drainage face, sometimes thin previous seams that can act as good drainage face are missed in the boring operations. The equation is based on the assumption that the consolidation is one-dimensional. In the field, the consolidation is generally 3-dimensional. The lateral drainage may have a significant effect on the time rate of consolidation. The initial consolidation and secondary consolidation have been neglected. Sometimes these form an important part of the total consolidation. In actual practice, the pressure distribution may be far from linear or uniform. Read More Muller-Breslau principle

Price Guard Wire Method

Price Guard Wire Method Some form of  Price Guard Wire Method  is generally used to eliminate the errors caused by leakage currents over insulation. Fig. 3.14 illustrates the operation of This Method. In fig 3.14(a), a high resistance mounted on a piece of insulating material is measured by the ammeter voltmeter method. The micro-ammeter measures the sum of the current through the resistor (IR) and the current through the leakage path around the resistor. The measured value of resistance computed from the readings indicated on the voltmeter and the microammeter, will not be a true value but will be in error.   Figure 3.14 Application of  guard  circuit for measurement of high resistance In fig, 3.14 (b), the  guard  terminal has been added to the resistance terminal block. The  guard  terminal surrounds the resistance terminal entirely and is connected to the battery side of the micro-ammeter. The leakage current IL now

Negative Booster

Negative booster A negative booster is employed to conform to the regulation that the potential difference between any two points of the rail return shall not exceed 7 V. Two boosters, positive and negative, are used which are mechanically coupled together and driven by a DC motor. The positive booster is connected to the trolley wire (near the generating station) and the negative booster (separately excited) is connected to the track rail.  The 'positive booster' adds voltage to the line while the 'negative booster lowers the potential of the point it is connected to. As we go along the trolley wire away from the generating station/sub-station, the potential drop increases, and the voltage of the trolley wire falls. Since the current returns via the track rail points away from the generating station acquire high potentials. This potential is brought down by the negative boost provided by the negative booster. When the load is sufficiently far aw