Architecture of microprocessor 8086 part2

Bus Interface Unit (BIU):-   This unit contains following parts of 8086:- 6 byte instruction queue segment registers (CS,DS,ES,SS) instruction  pointer  This unit performs following steps:-  Instruction fetch, Instruction queuing, Operand fetch and storage, Address relocation and Bus control. The BIU uses a mechanism known as an instruction stream...

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Architecture of 8086 microprocessor part1

8086 microprocessor:-  The microprocessor 8086 belongs from the group of 16-bit microprocessor chip designed by Intel between early 1976 and mid-1978. it have data bus of 16- bit and address bus of 20-bit. it have memory of 1MB power supply of +5v. CPU clock rate is 5MHz to 10MHz. it have package of 40 pin IC. it have eight general purpose register including stack...

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ADDRESSING MODES OF 8085 MICROPROCESSOR

ADDRESSING MODES: The method by which address of source of the data or destination of the data is given in the instruction is called addressing modes. the way in which address of the data is specified in  instruction is known as addressing modes 8085 uses five types of addressing modes. Direct addressing mode Register addressing mode  Register indirect addressing mode Immediate addressing...

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INSTRUCTION SET OF 8085 MICROPROCESSOR

INSTRUCTION SET:  An instruction set is a command given to the computer to perform specific operation. it contains command , operand and address of source  and destination. 8085 Microprocessor have five types of instruction set :   Data transfer instruction Arithmetic  instructions Logical instructions Control instructions Branching...

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ARCHITECHTURE OF 8085 MICROPROCESSOR part2

REGISTER SET OF 8085: 8085 have six general purpose register to store 8- bit data during execution. these registers are B,C,D,E,H and L. they can combine to perform 16-bit operation and denoted as BC,DE and HL pair.   ACCUMULATOR(A) : The accumulator is an 8-bit register . This register is a part of ALU unit This register is used to store 8-bit data and to...

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ARCHITECHTURE OF 8085 MICROPROCESSOR part1

The functional block diagram or architecture of 8085 Microprocessor is very important as it gives the complete details about a Microprocessor.  Fig. shows the Block diagram of a Microprocessor. 8085 BUS STRUCTURE  address bus:- The address bus is a group of 16 lines generally identified as A0 to A15.  The address bus is unidirectional: bits...

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Introduction to microprocessor 8085 and pin diagram part2

DMA Request Signal:HOLD and HLDA:-HOLD is an active high input signal used by the other controller to request microprocessor about use of address, data and control signal. The HOLD and HLDA signal are used for direct memory access(DMA). DMA controller receives a requests from a device and in turn issues the HOLD signal to the microprocessor.The processor releases...

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Introduction to microprocessor 8085 and pin diagram part1

Introduction:- Today the microprocessor based products have revolutionized every area of human  activity and have made a deep impact on quality of life. Right from small chip to supercomputer Microprocessor have become an integral part of the system. Microprocessor evolved from the developments in computer. One such microprocessor is Intel’s 8085, which is most popularly...

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