8086 Interrupts

8086 Interrupt: An 8086 interrupt can come from any one the three sources : External signal Special Instruction in the program Condition produced by instruction External Signal (Hardware Interrupt): An 8086 can get interrupt from an external signal applied to the nonmaskable interrupt (NMI) input pin; or the interrupt (INTR) input pin. Special Instruction: 8086 […]

Conditional Statement in Assembly Language Program

Conditional Statement in Assembly Language Program: Assembler supports the use of Conditional Statement in Assembly Language Program. It also allows to use them in macro sequences. These conditional statements control the flow of the program execution. Let us see the conditional statements in the assembly language program and conditional statements used in macros. Conditional Statement […]

8086 String Instructions

8086 String Instructions: The 8086 String Instructions 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 8086 String Instructions. These instructions repeat until specified condition exists. MOVS/MOVSB/MOVSW Instruction : This instruction copies a byte or word from a location in the data segment […]

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