Question

Write an Assembly Lariguage Program to add 2 decimal numbers stored at 1050 H and 1051 H.· Store result at 1052 H and 1053 H.

Answer 1

 

Label	Mnemonics + Operand	Comment
	LXI H,1050 H	Initialise HL pair to memory address 1050 H
	MVI B, 00H	Initialise register to store MSB of sum
	MOV A, M	Move first number in accumulator
	INX H	Get address of next number
	ADD M	Add next number to accumulator
	DAA	Decimal adjust accumulator
	JNC L1	Is Carry ? No, jump to label L1
	INR B	Increment register B
L1:	INX H	Increment HL pair by 1
	MOV M, A	Store LSB of Sum in memory
	MOV A, B	Move MSB of Sum in accumulator
	INX H	Increment HL pair by
	MOV M, A	Store MSB of Sum in memory
	RST 1.0	Restart