Cmp instruction in 8086 flags

 

 

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flags affected by cmp instruction in 8085
cmp carry flag
cmp instruction in 8086 with example
direction flag in 8086 microprocessor is used withcarry flag in 8086
cmp instruction x86
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x86 Instruction Set Reference. CMP. Compare Two Operands the first operand and then setting the status flags in the same manner as the SUB instruction. The carry flag C is set after a cmp operation if subtracting src from dest requires a borrow. This occurs only when dest is less than src where Page 1 of 53. 8086 instructions r - flag value depends on result of the instruction. second operand (as set by CMP instruction). Unsigned. The CMP Instruction. The 8086 provides many arithmetic operations: addition, subtraction, negation,multiplication and comparing two values.ADD :The add The CMP instruction compares two operands. It is generally used in conditional execution. This instruction basically subtracts one operand from the other Introduction: · 8086-CMP Instruction · Z: The zero flag is set if and only if ax = bx. · S: The sign flag is set to one if the result is negative. · O: The overflow Opcode Instruction Clocks Description 3C ib CMP AL,imm8 2 Compare immediate byte to AL CMP does not store a result; its purpose is to set the flags *)- The CMP instruction can be used to compare two 8-bit or two 16-bit numbers. - Whenever a compare operation is performed the result of such an operation

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