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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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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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 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,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 cup(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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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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