Old Assembly

;Question 1 - 2012
JMP START
DB 50 			;INTERUP PROCEDURE LOCATION

START:
    MOV DL, C0		;MEM LOC OF VDU

    MOV AL, 0A 		; sets al to 10, or 0A which is 10 in asci. 10 miliseconds= 1 second
    OUT 02    		; assigns the 0a to the interrupt 02, giving it an interrupt time of 1 second

    MOV AL, 2E 		; ASCII FOR "."
    STI 		;TURN ON INTERUPTS

    LOOP:
    JMP LOOP 		;INFINTE LOOP

    ORG 50
    CLI 		;STOP INTERUPTS
    MOV [DL], AL 	;OUTPUT "." TO CURRENT MEM LOC
    CMP DL, FF 		;CHECK IF AT END
    JZ END 		;IF SO JUMP TO END
    INC DL 		;OTHER WISE MOVE NEXT MEM LOC
    IRET 		;RETURN FROM INTERUPT AND TURN BACK ;ON INTERUPTS

    END:
    END