MICROPROCESSORS:-

What is microprocessor?

A microprocessor is a controlling unit of a micro-computer, fabricated on a small chip capable of performing Arithmetic Logical Unit (ALU) operations and communicating with the other devices connected to it.

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http://www.informationduniya.com/microprocessor-its-working/

8085 MICROPROCESSOR

8085 microprocessor is an 8-bit microprocessor which is designed by Intel in 1977.

It uses NMOS technology.

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http://www.informationduniya.com/8085-microprocessor/

8086 Microprocessor :-

8086 Microprocessor is an enhanced version of 8085 Microprocessor that was designed by Intel in 1976. It is a 16-bit Microprocessor having 20 address lines and 16 data lines, which consists of powerful instruction set, which provides operations like addition and multiplication easily...

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http://www.informationduniya.com/8086-microprocessor/

FLAG REGISTERS:-

It is an 8-bit register having five 1-bit flip-flops, which holds either 0 or 1 depending upon the result stored in the accumulator. The FLAGS registers is the status register in microprocessor that contains the current state of the processor...

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http://www.informationduniya.com/flag-registers-flag-manipulation-instruction/

Addressing Modes

The various formats for specifying operands are called addressing modes. These are the instructions used to transfer the data from one register to another register, from the memory to the register, and from the register to the memory without any alteration in the content.

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http://www.informationduniya.com/addressing-modes-their-classifications/

Instruction Set :-

INSTRUCTION SET is a command which we give to microprocessor to perform some task. The instruction set, also called instruction set architecture (ISA)

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http://www.informationduniya.com/instruction-set/

8255A – Programmable Peripheral Interface

The 8255A is a general purpose programmable I/O device designed to transfer the data from I/O to interrupt I/O under certain conditions as required. It can be used with almost any microprocessor. Generally, it works as a USB port in our Microprocessor.

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http://www.informationduniya.com/8255a-programmable-peripheral-interface/

8253/54- PROGRAMMABLE INTERVAL TIMER

8253 and 8254 are Programmable Interval Timers (PTIs) designed for microprocessors to perform timing and counting functions using three 16-bit registers...

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http://www.informationduniya.com/8253-54-programmable-interval-timer/

8259- PROGRAMMABLE INTERRUPT CONTROLLER (PIC)

8259- PROGRAMMABLE INTERRUPT CONTROLLER (PIC) 8259 is a PROGRAMMABLE INTERRUPT CONTROLLER (PIC) designed for the INTEL 8085 and INTEL 8086 microprocessor….

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http://www.informationduniya.com/8259-programmable-interrupt-controller-pic/