Q8: find even number from 1000 to 2000

org 100h

.data

dt1 dw 500 dup(0)

.code 

 mov ax,@data

 mov ds,ax

 mov si, offset dt1

 mov bx,1000

 mov cx,500

 label:

 mov [si],bx

 add bx,0002

 inc si

 inc si

 loop label

hlt

note: see in memory in two byte CE and 06 equal 1998 , so it down 1996 see cc,07

another way for find even number from 1000 to 1500:

org 100h

.data

dt1 db 250 dup(0)

.code

mov ax,@data

mov ds,ax

mov si,offset dt1

mov cx,1000

mov bx,02

new:

    mov [si],cx

    add cx,bx

    add si,bx

    cmp cx,1500

    jle new

ret

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َQ6:datasheet to find y=x2-10+x in assembly

org 100h

.data

dt1 db 1,2,3,4,5,6,7,8,9,10

dt2 db 10 dup(0)

.code

mov ax,@data

mov ds,ax

mov si,offset dt1

mov di,offset dt2

mov cx,0ah

lable:

mov ax,[si] 

mov bx,2

mul bx

sub ax,10

add ax,[si]   

mov [di],ax

inc si

inc di

loop lable

ret

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Q9:datasheet find sum and average

org 100h

.data

dt1 db  1,2,3,4,5,6,7,8,9,10

dt2 db 2 DUP(0)

.code

mov ax,@data

mov ds,ax

mov si,offset dt1

mov di,offset dt2 

MOV CX,0aH

MOV Ax,0000H

MOV BX,0000H

label:

MOV Bl,[si]

ADD Ax,Bx

INC SI

LOOP label

MOV [DI],Ax

MOV BL,0ah

DIV BL

inc di

MOV [DI],Ax

hlt

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Q4:datasheet

org 100h

.data

dt1 dB  55,45,10,64,96

dt2 db 1 DUP(0)

.code

mov ax,@data

mov ds,ax

mov si,offset dt1

mov di,offset dt2 

MOV CX,5H

MOV Ax,0000H

MOV BX,0000H

label:

MOV Bl,[si]

ADD Ax,Bx

INC SI

LOOP label

MOV BL,5H

DIV BL

MOV [DI],Ax

hlt

ret

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Q1:datasheet find area of square

org 100h 

.data

dt1 db 1,2,3,4,5,6,7,8,9,10

dt2 db 10 cup(0)  // for put zero in 3 location at once

.code

mov si,offset dt1

mov di,offset dt2

mov ax,@data

mov ds,ax

mov cx,000ah

label:

mov ax,0000h

mov al,[si]

mul al 

mov [di],al

inc si

inc di 

loop label

ret

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Q3: Convert capital Character to small Character (lowercase)

org 100h

.data

dt1 dB  'COMPUTER'

dt2 db 8 dup(0)

.code

mov ax,@data

mov ds,ax

mov si,offset dt1

mov di,offset dt2 

MOV BL,20H

MOV CX,08

label:

MOV AL,[si]

ADD AL,BL

MOV [DI],Al

INC SI

INC DI

LOOP label

hlt

another way :-
-to convert small Character  to capital Character only when find

org 100h

.DATA
DT1 DB 'University Of Technology' 
DT2 DB 24 DUP(0) 
.CODE 
 MOV AX,@DATA
 MOV DS,AX 
 MOV SI,OFFSET DT1 
 MOV DI,OFFSET DT2 
 MOV BX,0000H 
 MOV CX,18H 

 A:MOV AL,[SI+BX] 
 CMP AL,'a' 
 JGE L 
 JMP X 

 L:CMP AL,'z' 
 JLE L1 
 JMP X 

 L1:SUB AL,20H

 X:MOV [DI+BX],AL 
 INC BX 
 LOOP A

HLT

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Q2:data sheet find area of rectangle

org 100h

.data

dt1 db 1,2,3,4,5,6,7,8,9,10

dt2 db 5 dup(0)

.code

mov si,offset dt1

mov di,offset dt2

mov ax,@data

mov ds,ax

mov cx,000ah   

label:

mov ax,0000h

mov al,[si] 

inc si

mov ah,[si]

mul ah

mov [di],al

inc si

inc di

loop label

ret

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10:31 م

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Define Data in assembly

mov value from location in dt1 to dt2:-

org 100h 

.data

dt1 db 10

dt2 db 0  

.code

mov si,offset dt1

mov di,offset dt2

mov ax,@data

mov ds,ax

mov al,[si]

mov [di],al 

ret

find area of square and put solution in dt2:-

org 100h 

.data

dt1 db 2,4,8

dt2 db 3 dup(0)  // for put zero in 3 location at once

.code

mov si,offset dt1

mov di,offset dt2

mov ax,@data

mov ds,ax

mov cx,0003h

label:

mov ax,0000h

mov al,[si]

mul al 

mov [di],al

inc si

inc di 

loop label

ret

add 20 to offset dt1(si) and put solution in dt2(di):-

org 100h 

.data

dt1 db 1,2,3,4,5,6,7,8,9,10

dt2 db 10 dup(0)  

.code

mov si,offset dt1

mov di,offset dt2

mov ax,@data

mov ds,ax

mov cx,000ah

label:

mov ax,0000h

mov al,[si]

add al,20h 

mov [di],al

inc si

inc di 

loop label

ret

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2:35 م

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string instruction with repeated(REP)

1- move from block to another by using string instruction with repeated(REP) :

org 100h

mov ax,0h

mov ds,ax

mov es,ax

mov si,2000h  

mov di,3000h

mov cx,20h    // 32 consecutive bytes in hex=20

cld

rep movsb

hlt

2-scan number if find replace with another number else by default found in last location :

org 100h  

cld 

mov ax,0h

mov es,ax

mov ds,ax  

mov di,00d0h  

mov [di],45h // for certain replace else put 29 in the last location 

mov cx,0046h // 70 bytes

mov al,45h

repne scasb

dec di

mov byte ptr[di],29h

hlt

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string instruction : STOSB

org 100h

mov ax,0h

mov ds,ax // do not need because use (di with es)

mov es,ax

mov di,0a000h

mov al,05h

mov cx,0fh

cld            // do not need because only increment

again:

stosb            // di <-- al , inc di

loop again  // dec cx

hlt

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3:39 م

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new instruction : Call and push,pop

org 100h

mov al,01h

mov ah,01h

mov dl,02h

mov cx,0000h

mov bl,al

call square

add cx,bx

mov bl,ah

call square

add cx,bx

mov bl,dl

call square

add cx,bx

         

 square: 

push ax

mov al,bl

mul bl

mov bx,ax

pop ax

ret 

hlt

note : CX must be = 6 in this example 

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