Question

Write an Assembly Language Program to multiply a number stored at location 1050 with a nunber at location 1051. Result is 2-byte. Store result at locations 1052 and 1053.

Answer 1

Label	Mnemonics	Comments
	SUB A	clear the accumulator
	MOV D, A	clear the D register
	LXI H, 1050H	load immediately 1050 to HL pair
	MOV B, M	move memory to B reg.
	INX H	increment HL pair
	MOV C, M	move memory to C reg
BACK:	ADD B	add B with accumulator
	JNC NEXT	jump if not carry to NEXT
	INR D	increment D reg.
NEXT :	DCR C	Decrement C reg.
	JNZ BACK	jump if not zero to BACK
	INX H	increment HL pair
	MOV M, A	move accumulator to memory
	INX H	increment HL pair
	MOV M, D	move D reg. to memory
	RST 1.0	Restart