Home » 8086 Instruction Set

8086 Instruction Set

String Instruction in 8086

String Instruction in 8086: The String Instruction in 8086 are namely, REP/REPE/REPZ/REPNE/REPNZ MOVS/MOVSB/MOVSN CMPS/CMPSB/CMPSW SCAS/SCASB/SCASW LODS/LODSB/LODSW STOS/STOSB/STOSW REP/REPE/REPZ/REPNE/REPNZ Instruction : REP is a prefix which is written before one of the String Instruction in 8086. These instructions repeat until specified condition exists. MOVS/MOVSB/MOVSW Instruction : This instruction copies a byte or word from a location …

String Instruction in 8086 Read More »

8086 External Hardware Synchronization Instructions

8086 External Hardware Synchronization Instructions: The 8086 External Hardware Synchronization Instructions are namely HLT WAIT ESC LOCK NOP HLT Instruction : The HLT instruction will cause the 8086 to stop fetching and executing instructions. The 8086 will enter a halt state. The only ways to get the processor out of the halt state are with an …

8086 External Hardware Synchronization Instructions Read More »

Program Execution Transfer Instructions in 8086 Microprocessor

Program Execution Transfer Instructions in 8086 Microprocessor: The Program Execution Transfer Instructions in 8086 Microprocessor are namely a) Unconditional transfer instructions: CALL RET JMP J cond CALL Instruction : The CALL instruction is used to Program Execution Transfer Instructions in 8086 Microprocessor to a subprogram or procedure. There are two basic types of CALLs, near …

Program Execution Transfer Instructions in 8086 Microprocessor Read More »

Shift Instructions in 8086

Shift Instructions in 8086: The Shift Instructions in 8086 are follows SAL/SHL SHR SAR SAL/SHL Instruction : SAL/SHL destination, count. SAL and SHL are two mnemonics for the same instruction. This instruction shifts each bit in the specified destination to the left and 0 is stored at LSB position. The MSB is shifted into the …

Shift Instructions in 8086 Read More »

Arithmetic Instructions in 8086

Arithmetic Instructions in 8086: Arithmetic Instructions in 8086 are follows a) Addition Instructions : ADD ADC INC AAA DAA ADD/ADC Instruction : ADD destination, source / ADC destination, source. These instructions add a number from source to a number from destination and put the result in the destination. The ADC, instruction also adds the status …

Arithmetic Instructions in 8086 Read More »