Question

Write an Assembly Language Program to find absolute difference of two hex numbers stored in memory locations 5000H and 5001H. Store the result at 5002 H.

Answer 1

Label	Opcode Operand	Comments
LOOP:	LXI, H, 5000 H	; Initialise HL pair to memory address 5000 H
	MOV A, M	; Move memory Content to accumulator
	INX H	; Increment HL pair by 1
	SUB M	; Subtract memory Content from accumulator
	JP LOOP	; If result is positive jump to LOOP
	CMA	; Complement the contents of accumulator
	ADI 01	; Take 2’s complement by adding 1.
	INX H	; Increment HL pair by 1
	MOV M, A	; Store the result in memory location
	RST 1	; Restart