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### Pin Diagram Of 8086 Microprocessor: The Hardware Model

The 8086 is a 16-bit microprocessor intended to be used as the CPU in a microcomputer. The 8086 Microprocessor - Internal Architecture sh...

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### Basic Logic Gates : AND, OR, NOT

A gate is an electronic two state circuits which operates on one or more input signals to produce an output signal. The signals are either low voltage (denotes 0) or high voltage (denotes 1) . this is also called as logic gates. There are two types of logic gates.
1. Basic Logic Gates (AND, OR, NOT )
2. Derived logic Gates (NOR, NAND, XOR, XNOR)
In this post we will focus on basic logic gates and on next post we will discuss derived logic gates.
There are mainly three basic gates will see one by one.

#### 1.     NOT Gate (Inverter , Complement Gate):

An inverter is a gate with only one input signal and one output signal; the output state is always the opposite of the input state. It is also called as NOT Gate because the output is not the same as the input. It is always complement (opposite ) value of the input. NOT operation is always represented by either $\overline{X}=o$ or X1 . The symbolic representation and truth table are as follows.

2.     OR gate :
The or gate is having two or more inputs and only one output. If any one of the input signal is high (1) the output signal is high (1). And if all inputs are low (0) then output is low (0).  OR operation represented the symbol “ + “ . The symbolic representation and  the truth table for two inputs and three inputs are as follows.
3.     AND Gate : AND Gate is also having two or more input signals and only one output signal. When any one input are low (0) , the output is low (0) and when all inputs are high (1), then output is high (1). AND operation represented by the symbol “ .” .  Symbolic representation and truth table are as follows.

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### Conversion from Binary to Decimal

We have already seen the definition of Binary Number System and the Conversion From Decimal to Binary. Today we will see the conversion from binary to decimal.
steps....

### Conversion from Decimal To Binary and decimal Fractiion to binary

Step by step procedure as follows.

1.      Divide the decimal number by 2
2.      Keep remainder and quotient aside.
3.      Again Divide this quotient by 2 and keep remainder and quotient aside.

### History:

When Alexander graham Bell patented the telephone in 1876, there was an enormous demand for his new invention. People purchase the telephones which came in pairs.

### Bus structure of 8085 microprocessor

The microprocessor MPU performs various operations with peripheral devices or a memory location by using three sets of communication lines called buses: the address bus, the data bus and the control bus. And these three combined lines is called as system bus.