Repne instruction in 8086

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rep instruction in 8086 example

REPNE/REPNZ - Repeat Not Equal / Repeat Not Zero Usage: REPNE REPNZ Modifies flags: None Repeats execution of string instructions while CX != Basic Architecture, Order Number 253665; Instruction Set Reference A-Z, Order Number 325383; Virtual-8086 Mode Exceptions Section .The REP prefixes apply only to one string instruction at a time. To repeat a block of instructions, use the LOOP instruction or another looping construct. All The String Instruction in 8086 are namely, REP/REPE/REPZ/REPNE/REPNZ Instruction : REP is a prefix which is written before one of the String Instruction in REP, REPE (repeat while equal), and REPNE (repeat while not equal) are prefix that are applied to string operation. Each prefix cause the string instruction Each prefix causes the associated string instruction to repeat until the count register (CX) or the zero flag (ZF) matches a tested condition. REP/REPE/REPZ/REPNE/REPNZ -- Repeat Following String Operation. Opcode, Instruction, Clocks, Description, Example Virtual 8086 Mode Exceptions.