UET Peshawar Abbottabad Campud

13
Micro Processor
Assignment # 02
Submitted by Usama Sheikh (46)
Usman Ali Khan (38)
Atiq-ur-Rehman(14)
Wahab Akbar(20)
Submitted to Engr. Munazza Razzaq

Q1: Write a program the counts no of zeros in a 16bit word.
Program Code:-
.MODEL SMALL
.STACK 64
.DATA
HWRD DW 9E46 ORG 0600 ZERO DB ?
.CODE
MAIN PROC FAR MOV AX,@DATA MOV DX,AX SUB BL,BL MOV DL,16 MOV AX,HWRD
BACK: ROL AX,1 JC NEXT INC BL
NEXT: DEC DL JNZ BACK MOV ZERO,BL MOV AH,4CH INT 21H MAIN ENDP
END MAIN
Q2: write a program that finds the smallest no among list of following no’s, 12,100,01,8,0
Program Code:-
.MODEL SMALL
.STACK 64
.DATA
NUMBERS DB 12,100,01,8,0 ORG 008 SMALLEST DB ?
.CODE
MAIN PROC FAR MOV AX,@DATA MOV DS,AX MOV CX,5 MOV BX,OFFSET NUMBERS MOV AL,[BX]
BACK: CMP AL,[BX] JC NEXT MOV AL,[BX]
NEXT: INC BX LOOP BACK MOV SMALLEST,AL MOV AH,4CH INT 21H MAIN ENDP
END MAIN
Q3: write a program to copy following hex no’s from 0200 memory location to 0400 location in reverse order. 12H,25H,35H,45H
Program Code:-
.MODEL SMALL
.STACK 64
.DATA
ORG 0200H hex_nos DB 12H,25H,35H,45H ORG 0400H COPY-data DB 4 DUP(?)
.CODE
MAIN PROC FAR MOV AX,@DATA MOV DS,AX MOV SI,OFFSET hex_nos INC SI INC SI INC SI MOV DI,OFFSET COPY-data MOV CX,04H
AGAIN: MOV AL,[SI] MOV [DI],AL DEC SI INC DI DEC CX JNZ AGAIN MOV AH,4CH INT 21H MAIN ENDP
END MAIN