How Can Add Two Numbers In Assembly Language 8086?

1. Load 0000H into CX register (for carry)
2. Load the data into AX(accumulator) from memory 3000.
3. Load the data into BX register from memory 3002.
4. Add BX with Accumulator AX.
5. Jump if no carry.
6. Increment CX by 1.
7. Move data from AX(accumulator) to memory 3004.

How do you add two 16 bit numbers in assembly language?

1. Step I : Initialize the data segment.
2. Step II : Get the first number in AX register.
3. Step III : Get the second number in BX register.
4. Step IV : Add the two numbers.
5. Step V : Display the result.

How do you subtract two numbers in assembly language?

1. Step 1 : Initialize the data segment.
2. Step 2 : Get the first number in AL register.
3. Step 3 : Get the second number in BL register.
4. Step 4 : Subtract the two numbers.
5. Step 5 : Display the result.

Can you add two registers?

You can: add or

subtract

the contents of two registers, and place the result in a third register. … add a larger integer to, or subtract it from, the value in a register, and return the result to the same register.

What is add in assembly language?

add —

Integer Addition

. The add instruction adds together its two operands, storing the result in its first operand. Note, whereas both operands may be registers, at most one operand may be a memory location. Syntax.

When two 16-bit numbers are multiplied in 8086 the result is stored in?

Problem – Write a program to multiply two 16-bit numbers where starting address is 2000 and the numbers are at 3000 and 3002 memory address and store result into

3004 and 3006 memory address

.

How can I take 16-bit input in 8086?

1. load the value stored into register.
2. divide the value by 10.
3. push the remainder into the stack.
4. increase the count.
5. repeat the steps until the value of the register is greater than 0.
6. until the count is greater than zero.
7. pop the stack.
8. add 48 to the top element to convert it into ASCII.

What is the instruction for 16-bit addition in 8086?

8086 is 16-bit register. We can simply take the numbers from

memory to AX and BX register

, then add them using ADD instruction. When the Carry is present store carry into memory, otherwise only store AX into memory.

How can I add two 16-bit numbers in 8051?

THEORY. As there is only one 16-bit Register in 89C51, 16-bit addition is performed by using ADDC instruction twice, i.e. adding LSD first and MSD next.

DATAM1

– 12; DATAM2 = 56.

How many registers are there in 8086 microprocessor?

The 8086 has

eight more or less general 16

-bit registers (including the stack pointer but excluding the instruction pointer, flag register and segment registers). Four of them, AX, BX, CX, DX, can also be accessed as twice as many 8-bit registers (see figure) while the other four, SI, DI, BP, SP, are 16-bit only.

How does sub work in assembly?

The SUB instruction

subtracts the value of Operand2 or imm12 from the value in Rn

. In certain circumstances, the assembler can substitute one instruction for another.

Which instruction can be used instead of MUL to multiple a number by 2?

Use shifts and adds/subs

instead of multiplication.

How do you divide in 8086?

1. Assign value 500 in SI and 600 in DI.
2. Move the contents of [SI] in BL and increment SI by 1.
3. Move the contents of [SI] and [SI + 1] in AX.
4. Use DIV instruction to divide AX by BL.
5. Move the contents of AX in [DI].
6. Halt the program.

What is sub in assembly language?

The SUB instruction

performs integer subtraction

. It evaluates the result for both signed and unsigned integer operands and sets the OF and CF flags to indicate an overflow in the signed or unsigned result, respectively.

What is ax in assembly language?

AX is

the primary accumulator

; it is used in input/output and most arithmetic instructions. For example, in multiplication operation, one operand is stored in EAX or AX or AL register according to the size of the operand.

What is RD in assembly language?

Rd:

Destination register

. Rn: An operand in a register for an arithmetic operation. Rm: An operand in a register for an arithmetic operation. Ra: A value in a register to be used in an addition or subtraction.

What is the file extension given for assembly language program in 8086?

Explanation: All the files should have the extension,

. ASM

.

What is mul bx where is the result stored?

The result will be stored in

ax

, which is the implicit destination register. Well, technically, the result will be stored in dx:ax . This is a register pair, and means that the high portion of the result will be stored in dx , while the low portion of the result will be stored in ax .

When 2 16-bit numbers are multiplies how the result is stored?

The multiplication of the two 16 bit numbers may result into a 32 bit number. So result is stored in

the DX and AX register

. The MSB of result is stored in the DX register and LSB of result in AX register.

Where is the product stored in 16-bit multiplication?

Discussion. We can do multiplication in 8086 with MUL instruction. For 16-bit data the result may exceed the range, the higher order 16-bit values are stored at

DX register

.

How do you write 16-bit numbers?

The smallest signed 16-bit number is

-32768

and the largest is 32767. For example, 1101,0000,0000,0100

₂

or 0xD004 is -32768+16384+4096+4 or -12284.

Which instruction is used for 16-bit addition?

Following this, we use the

instruction adc – add with carry –

to add the upper bytes of our 16-bit numbers. adc is used just like add, taking two registers as operands, computing their sum, and storing the result in the first register.

How does Div work in assembly?

div executes unsigned division

. div divides a 16-, 32-, or 64-bit register value (dividend) by a register or memory byte, word, or long (divisor). The quotient is stored in the AL, AX, or EAX register respectively. The remainder is stored in AH, Dx, or EDX.

How many numbers is 16 bits?

A 16-bit integer can store

2

¹⁶

(or 65,536) distinct values

. In an unsigned representation, these values are the integers between 0 and 65,535; using two’s complement, possible values range from −32,768 to 32,767.

What are the different types of instructions in 8086 microprocessor?

• Data Transfer Instructions.
• Arithmetic Instructions.
• Bit Manipulation Instructions.
• String Instructions.
• Program Execution Transfer Instructions (Branch & Loop Instructions)
• Processor Control Instructions.
• Iteration Control Instructions.
• Interrupt Instructions.

What are the instruction set of 8086?

What is the difference between microprocessor and microcontroller?

KEY DIFFERENCES

Microprocessor consists of only a Central Processing Unit, whereas Micro Controller contains a CPU, Memory, I/O all integrated into one chip. … Microprocessor uses an external bus to interface to RAM, ROM, and other peripherals, on the other hand,

Microcontroller uses an internal controlling bus

.

How many data lines are there in 8086?

The 8086 uses 20-line address bus. It has a

16-line

data bus. The 20 lines of the address bus operate in multiplexed mode.

How many numbers of 16-bit registers are there in 8086?

There are

14 16-bit

registers in a 8086 microprocessor: Four 16-bit general purpose registers. (AX, BX, CX and DX) Each of these can be split into two 8-bit registers.

How can add two numbers in assembly language 8051?

What is the meaning of ORG 0000h?

ORG(origin): This directive indicates the start of the program. This is used to set the register address during assembly. For example; ORG 0000h

tells the compiler all subsequent code starting at address 0000h

.

How many GPR are there in 8086?

General purpose registers are used to store temporary data within the microprocessor. There are

8 general

purpose registers in 8086 microprocessor.

Which instruction is used for division of two bytes?

The

DIV/IDIV

Instructions

The division operation generates two elements – a quotient and a remainder.

How do you divide two numbers in emu8086?

1. prepare N1 , N2 and set some R to -1.
2. increment R.
3. subtract N1 from N2 (update N2 with result)
4. when result of subtraction is above or equal to zero, go to step 2.
5. R has result of integer division N2 / N1.

How does CMP work in 8086?

The CMP instruction

compares two operands

. … This instruction basically subtracts one operand from the other for comparing whether the operands are equal or not. It does not disturb the destination or source operands. It is used along with the conditional jump instruction for decision making.

What is SBB in assembly language?

SBB is a mnemonic that stands for ‘

SuBtract with Borrow

‘ and ‘R’ stands for any of the following 7 registers, and also memory location M as pointed by HL register pair. … The result of the subtraction will be stored in the Accumulator replacing Accumulator’s initial value.

How do you subtract 16 bit numbers?

1. Get the LSB in L register and MSB in H register of 16 Bit number.
2. Exchange the content of HL register with DE register.
3. Again Get the LSB in L register and MSB in H register of 16 Bit number.
4. Subtract the content of L register from the content of E register.

When we multiply two 8 bit numbers in how many bits there answer will be?

As the multiplication of two 8 bit numbers can be maximum of

16 bits

so we need register pair to store the result.