8086 Interrupt Types: The 8086 Interrupt Types are Dedicated Interrupts: Type 0 : Divide by Zero Interrupt When the quotient from either a DIV or IDIV instruction is too large to fit in the result register;…
Interrupt Structure of 8086: An Interrupt Structure of 8086 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…
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…
Macros in Microprocessor: Macro is a group of instructions. The Macros in Microprocessor assembler generates the code in the program each time where the macro is 'called'. Macros can be defined by MACRO and ENDM…
Parameter Passing Techniques in Microprocessor: Parameter Passing Techniques in Microprocessor - Whenever we need to use a group of instructions several times throughout a program there are two ways we can avoid having to write…
Modular Programming in 8086 Microprocessor: Many programs are too large to be developed by one programmer. Such programs are developed by team of programmers. They divide a large program into smaller modules. Then each Modular…
Assembly Instruction Format: Although each Assembly Instruction Format has its own unique syntactical structure, such as requiring upper case or lower case, or requiring colons after label definitions we discuss the common features that assembler…
Program Development and Execution: The steps involved in Program Development and Execution of assembly language programs. Fig. 8.1 shows these steps. The left side of the figure shows the time period, at which each step…
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.…
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…