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DAS: Decimal Adjust after Subtraction:- This instruction converts the result of subtraction operation of 2 packed BCD numbers to a valid BCD number. The subtraction operation has to be only in the AL. If the lower nibble of AL is higher than the value 9, this instruction will subtract 06 from lower nibble of the AL. If the output of subtraction operation sets the carry flag or if the upper nibble is higher than value 9, it subtracts 60H from the AL. This instruction modifies the CF, AF, PF, SF and ZF flags. The OF is not defined after DAS instruction. The instance is following:
Example :
The processor 8088 The launching of the processor 8086 is consider as a remarkable step in the development of high speed computing machines. Before the introduction of 8086 mo
ROR : Rotate Right without Carry: This instruction rotates the contents of destination operand to the bit-wise right either by one or by the count specified in register CL, exclud
PTR : Pointer:- The pointer operator which is used to declare the type of a variable, label or memory operand. The operator PTR is prefixed by either WORD or BYTE. If the prefi
Memory Segmentation : The memory in an 8086/8088 based system is organized as segmented memory. In this scheme, the whole physically available memory can be divided into a n
How do i convert a asci number to numerals?
Example : Add the contents of the 2000H: 0500H memory location to contents of 3000H: 0600H and store the result in 5000H: 0700H. Solution : Unlike the past example progra
Explain the basic method for implementing paging
The Alpha : The development of the Alpha chip start in the year 1988 The new chip used 64 bit technology, let users to pack more complexity into their programs than exis
2. Write a program to separate out positive and negative numbers from a given series of 16-bit hexadecimal numbers.
Write an account of your findings and produce a report containing all aspects of the above. Include a step-by-step 'simple User Guide' so that your program can be operated as inten
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