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Oct 9, 2017 Hello, DA A- decimal adjust accumulator after addition. how the instruction "DA A" is used in 8051 assembly language. kindly provide some examples with decimal numbers with it. can it be used to convert binary numbers into BCD? thank you!
Alphabetical List of Instructions. ACALL - Absolute Call; ADD, ADDC - Add Accumulator (With Carry); AJMP - Absolute Jump; ANL - Bitwise AND; CJNE - Compare and Jump if Not Equal; CLR - Clear Register; CPL - Complement Register; DA - Decimal Adjust; DEC - Decrement Register; DIV - Divide Accumulator by B
The 8051 Simulator for Lecturers and Students. This flag is usually called the zero or Z flag and conditional jump instructions that test its value can be used to branch if the accumulator is zero or if the accumulator is not zero . If it is, the instruction DA A (decimal adjust A) can be used to change the HEX code in A to BCD.
DA. The DA instruction adjusts the eight-bit value in the Accumulator resulting from the earlier addition of two variables (each in packed-BCD format), producing two four-bit digits. Any ADD or ADDC instruction may have been used to perform the addition.
Nov 7, 2016
In Section 6.1 we discuss instructions and programs related to addition, subtraction, multiplication, and division of unsigned numbers. Signed numbers [] The DA (decimal adjust for addition) instruction in the 8051 is provided to correct the aforementioned problem associated with BCD addition. The mnemonic “DA" has
Apr 5, 2013 Instructions that Affecting Flags (1/2) Instruction Mnemonic Flags Affected ADD C AC OV ADDC C AC OV SUBB C AC OV MUL C="0" OV DIV C="0" OV DA A C SETB C C="1" MOV C, bit CSub: MC Topic: Arithmetic & Logical operations; 7. Instructions that Affecting Flags (2/2)
Working of "DA" Instruction: The "DA" instruction is used after the ADD of ADDC instruction. Add "0110" in binary or "6H" in the lower nibble of 4 bits, if lower nibble of 4 bits is greater than 9 or if auxiliary carry is 1 i.e AC="1", to correct the BCD problems.
8051/8052 Instruction: DA - 8052.com. Description: DA adjusts the contents of the Accumulator to correspond to a BCD (Binary Coded Decimal) number after two BCD numbers have been added by the ADD or ADDC instruction. If the carry bit is set or if the value of bits 0-3 exceed 9, 0x06 is added to the accumulator.
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