Question

A series of 1-bute hexadecimal data is stored at memory locations from D600 H to D60A H. Write an assembly language program to replace each odd number in the series with data 00H.

Answer 1

Label	Mnemonics code	Comments
	MVI B, OBH	; Move OB into reg. B
	LXI H, D600H	; Load D600 H in HL pair
Repeat	MOV A, M	; copy mem. into A
	RAR / RRC	; Rotate A right 1-bit
	JNC NEXT	; Jump if not cry
NEXT:	INX H	; Increment HL by 1
	DCR B	; decrement B by 1
	JNZ Repeat	; Jump on no zero
	HLT	; Halt the process