What does AAA do in assembly language?
Table of Contents
- 1 What does AAA do in assembly language?
- 2 How many operations are there for AAA instruction?
- 3 What is the use of DAA instruction?
- 4 What is source operand and destination operand for instruction AAA?
- 5 What is the source operand and destination operand in instruction AAA?
- 6 What do you understand by instructions explain arithmetic and logical instructions in 8086 microprocessors?
- 7 What is the source of run and destination operand for instruction AAA Mcq?
- 8 How does AAA work in 8086 instruction set?
- 9 What are the integer addition instructions in 8086 microprocessor?
- 10 What is the difference between add and ADC instruction in 8086?
What does AAA do in assembly language?
AAA–ASCII Adjust After Addition The AAA instruction is only useful when it follows an ADD instruction that adds (binary addition) two unpacked BCD values and stores a byte result in the AL register. The AAA instruction then adjusts the contents of the AL register to contain the correct 1-digit unpacked BCD result.
How many operations are there for AAA instruction?
The ASCII arithmetic instruction function with ASCII-coded numbers. These numbers range in value from 30H to 39H for the numbers 0 to 9. There are four instructions used with ASCII arithmetic operations: AAA (ASCII Adjust after Addition)
What are the instructions in 8086?
Arithmetic instructions in 8086 microprocessor
| OPCODE | OPERAND | EXPLANATION |
|---|---|---|
| IMUL | 8 or 16 bit register | performs signed multiplication |
| DIV | 8-bit register | AX = AX / 8-bit reg. ; AL = quotient ; AH = remainder |
| DIV | 16-bit register | DX AX / 16-bit reg. ; AX = quotient ; DX = remainder |
| IDIV | 8 or 16 bit register | performs signed division |
What is the use of DAA instruction?
The DAA (Decimal Adjust after Addition) instruction allows addition of numbers represented in 8-bit packed BCD code. It is used immediately after normal addition instruction operating on BCD codes. This instruction assumes the AL register as the source and the destination, and hence it requires no operand.
What is source operand and destination operand for instruction AAA?
Explanation: The source operand is the element which is data or data stored memory location on which operation is performed. Explanation: Since the destination should be able to store the data, immediate data cannot be considered as a destination operand. Explanation: AAA is a mnemonic.
Which of the following instruction is same as JNAE?
Branch Instructions
| Instruction | Description |
|---|---|
| JA or JNBE | Jump if above, not below, or equal i.e. when CF and ZF = 0 |
| JAE/JNB/JNC | Jump if above, not below, equal or no carry i.e. when CF = 0 |
| JB/JNAE/JC | Jump if below, not above, equal or carry i.e. when CF = 0 |
| JBE/JNA | Jump if below, not above, or equal i.e. when CF and ZF = 1 |
What is the source operand and destination operand in instruction AAA?
What do you understand by instructions explain arithmetic and logical instructions in 8086 microprocessors?
These instructions are used to perform operations where data bits are involved, i.e. operations like logical, shift, etc. We can say that these instructions are logical instructions. In 8086, the destination register may or may not the Accumulator. Let us see the logical instructions of 8086 microprocessor.
How DAA instruction works in 8086?
The DAA instruction is only useful when it follows an ADD instruction that adds (binary addition) two 2-digit, packed BCD values and stores a byte result in the AL register. The DAA instruction then adjusts the contents of the AL register to contain the correct 2-digit, packed BCD result.
What is the source of run and destination operand for instruction AAA Mcq?
Explanation: AAA is a mnemonic. It doesn’t have either a source or destination operand. Explanation: The AAD instruction converts two unpacked BCD digits in AH and AL to the equivalent binary number in AL.
How does AAA work in 8086 instruction set?
– Stack Overflow how does AAA work in 8086 instruction set? if low nibble of AL > 9 or AF = 1 then: AL = AL + 6 AH = AH + 1 AF = 1 CF = 1 else AF = 0 CF = 0 in both cases: clear the high nibble of AL. Example: MOV AX, 15 ; AH = 00, AL = 0Fh AAA ; AH = 01, AL = 05 RET
What is AAA instruction in microcontroller?
AAA instruction stands for ASCII Adjust for Addition. It is used whenever we want to add two decimal digits which are Representative in ASCII code, without masking off “3” in upper nibble. In our program AAA instruction is not available in the instruction set of 8086.
What are the integer addition instructions in 8086 microprocessor?
8086 Integer Addition Instructions. 8086 microprocessor supports following types of addition instructions. ADD; ADC; INC; AAA; DAA; Now lets discuss the details of Addition instructions with assembly code examples. 8086 ADD Instruction . This instruction adds the data of destination and source operand and stores the result in destination.
What is the difference between add and ADC instruction in 8086?
8086 ADC Instruction The ADC and ADD instruction perform the same operation of addition. The only difference is that ADC instruction also adds the carry flag bit to the sum of two operands.