Shift and rotate instructions in 8086 ppt to pdf

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shift and rotate instructions in 8086 ppt to pdf

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Shift And Rotate Instructions In 8086 Pdf

Instructions are classified on the basis of functions they perform. They are categorized into the following main types:. All the instructions which perform data movement come under this category. The source data may be a register, memory location, port etc. The following instructions come under this category:.

Instructions of this group perform addition, subtraction, multiplication, division, increment, decrement, comparison, ASCII and decimal adjustment etc. It is also called program execution transfer instruction. Instructions of this group transfer program execution from the normal sequence of instructions to the specified destination or target. Instructions of this instruction set are related to flag manipulation and machine control.

String is series of bytes or series of words stored in sequential memory locations. The provides some instructions which handle string operations such as string movement, comparison, scan, load and store. JavaTpoint offers too many high quality services. Mail us on hr javatpoint. Please mail your requirement at hr javatpoint. Duration: 1 week to 2 week.

Microprocessor Tutorial. Next Topic. Manual T. Verbal A. Angular 7. Compiler D. Software E. Web Tech. Cyber Sec. Control S. Data Mining. Javatpoint Services JavaTpoint offers too many high quality services.

They are categorized into the following main types: Data Transfer instruction All the instructions which perform data movement come under this category. Moves data from register to register, register to memory, memory to register, memory to accumulator, accumulator to memory, etc. Loads a word from the specified memory locations into specified register. It also loads a word from the next two memory locations into DS register.

Loads a word from the specified memory locations into the specified register. It also loads a word from next two memory locations into ES register.

Exchanges the contents of the bit or 8-bit specified register with the contents of AX register, specified register or memory locations. Pushes sends, writes or moves the content of a specified register or memory location s onto the top of the stack. Pops reads two bytes from the top of the stack and keeps them in a specified register, or memory location s. Obtains 2's complement i. Performs bit by bit logical AND operation of two operands and places the result in the specified destination.

Performs bit by bit logical OR operation of two operands and places the result in the specified destination. Performs bit by bit logical XOR operation of two operands and places the result in the specified destination. Causes the program execution to jump unconditionally to the memory address or label given in the instruction. Calls a procedure whose address is given in the instruction and saves their return address to the stack.

Returns program execution from a procedure subroutine to the next instruction or main program. Escape: makes bus free for external master like a coprocessor or peripheral device. When WAIT instruction is executed, the processor enters an idle state in which the processor does no processing. It is a prefix instruction.

It makes the LOCK pin low till the execution of the next instruction. Moves 8-bit or bit data from the memory location s addressed by SI register to the memory location addressed by DI register.

Compares the content of memory location addressed by DI register with the content of memory location addressed by SI register. Compares the content of accumulator with the content of memory location addressed by DI register in the extra segment ES.

Chapter 5: Arithmetic and Logic Instructions

Shift: Bit shifted out is lost Rotate: Bit shifted out from one end of the destination operand is put back on the other end. Performs right shift on destination operand. The effect on flag is same as SHL. If number is even, one right shift is same as divide the number by 2. If number is odd, one right shift halves it and rounds down to nearest integer. Use right shift to divide unsigned number by 4.


Along with the bitwise instructions, from the previous lectures, shift instructions are among the most characteristic of assembly language.


8086 Microprocessor Instruction Set Pdf

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Instructions are classified on the basis of functions they perform. They are categorized into the following main types:. All the instructions which perform data movement come under this category. The source data may be a register, memory location, port etc. The following instructions come under this category:.

Assembly Language

shift and rotate instructions

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Copyright by Pearson Education, Inc. Introduction We examine the arithmetic and logic instructions. The arithmetic instructions include addition, subtraction, multiplication, division, comparison, negation, increment, and decrement. Use the shift and rotate instructions. Upon completion of this chapter, you will be able to:.

Chapter 3: instruction sets of 8086 .Chapter 3: instruction sets of 8086 The [bx], [si], and [di]

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  • View Instruction Set stjamescsf.org from ITE at VIT University Vellore. Shift and Rotate Instructions SHL/SAL: shift logical left/shift arithmetic left SHR: shift. Hrigreimcarnigh - 21.05.2021 at 02:26

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