Assembly Language Tutorial

 
 
 

Instructions

Input - Output Instructions

Display a character Read a character and display it on new line Display string Read digit, compute and display sum w/o variable Read digit, display difference w/o variable Read digit, compute, display sum using variable Read digit, display difference using variable Convert lower case letter in to upper case Read character, display in new line - user prompt Read 1st, middle, last initial - down left margin Read one hex digit, display next line in decimal Display 10*10 solid box asterisk - INT 21H and 9H Read 3 char show in middle of 11*11 box, beep comp

Flow Control Instructions

Print ASCII characters Print counting from 0 to 9 Print upper case letters from A to Z Print lower case letters from a to z in reverse Read letter print if it is \'?\' - simulation of if Read char print smallest - simulation of if-else Positive, negative num- simulation of switch-case Print upper case char - simulation of if-else then Simulation of if-else then structure Print ASCII characters - for loop simulation Print upper case A to Z - while loop simulation Print upper case A to Z - Do while loop simulation Read letters display in next line in alpha order Display digit in next line if fail prompt message Read hex digit display on next line in decimal Display capital letter in string alphabetically Show longest sequence consecutive alphabetically

Logic - Shift - Rotate Instructions

Convert upper to lower case - OR logic instruction Convert lower to upper - AND logic instruction Display even or odd number - TEST instruction Multiply content of AL by 8 - SHL instruction Divide content of AL by 4 - SHR instruction Store binary- BX,count bit value 1 w/o changing BX Read binary num, reverse its bit pattern Read binary number store in BX and display Read char- show ASCII in binary- 1 bit in ASC code Read char print ASCII in HEX till- carriage return Read HEX number and print in binary next line Read binary number and print in HEX next line Read 2 binary number and print its sum in binary Read 2 unsigned HEX num and print their sum Read string of decimal digit print sum in HEX Read str of char ter by CR show reverse order Read character using procedure goto next line Binary form & reverse bit of num - procedures Product by ADD, SHIFT instruction - procedure Display text with letters in each word reversed Validate expression READ store bin num in AX, RANDOM, WRITE

Multiplication - Division Instructions

Print factorial in binary form - MUL instruction Print num decimal form - DIV, OUTDEC proc Print factorial in decimal form - MUL, DIV instru Print num next line - proc for DECIMAL i/o Proc INDEC and OUTDEC, handle BackSpace key Proc INDEC and OUTDEC - files - INCLUDE instru Print factorial in dec form - MUL, DIV instruction Proc INDEC, OUTDEC - Handle OverFlow Read time in seconds display time HH:MM:SS Express - quarter, dime, nickel, pennie Read fraction form M/N print N decimal place GCD of two integers M and N

Arrays - Addressing Modes

Sum of array - sum in AX - Register Indirect Mode Initialize array with 0 using DUP instruction Enter an array of size 10 and display it Declare, initialize, print 2D array of size 5x5 Enter 2D array of 5x5 in row major order, print Print 3rd R x 4th C using Register Indirect Mode Display reversing array contents using STACK Reverse content of array - Register Indirect Mode Sort array using Bubble Sort method Sort an array using Select Sort method Print 2D array of size 4x5 in row major order Print 2D array of size 4x5 in column major order 2D arr clear 3rd row 4th column - Based Index Mode Compute class average on each exam Print name each student, average of 4 exams Insert single characters into array - it is sorted

String Instructions

Copy string into another using MOVSB, REP Read string, stores in variable using STOSB Display string using instruction LODSB Store display str - proc READ_STR, DISP_STR Count no of vowels constants - SCASB, REPNE

General Programs

Get and display the current system time
 
 
 .MODEL SMALL
 .STACK 100H

 .DATA
   PROMPT_1  DB  \'Enter the character : $\'
   PROMPT_2  DB  \'The given character is : $\'

 .CODE
   MAIN PROC
     MOV AX, @DATA                ; initialize DS  
     MOV DS, AX

     LEA DX, PROMPT_1             ; load and display PROMPT_1  
     MOV AH, 9
     INT 21H

     MOV AH, 1                    ; read a character
     INT 21H

     MOV BL, AL                   ; save AL into BL

     CALL NEXT_LINE               ; call the procedure NEXT_LINE

     LEA DX, PROMPT_2             ; load and display PROMPT_2  
     MOV AH, 9
     INT 21H

     MOV AH, 2                    ; display the character in BL
     MOV DL, BL
     INT 21H

     MOV AH, 4CH                  ; return control to DOS
     INT 21H
   MAIN ENDP



 ;------------------------  PROCEDURE DEFINITIONS  -------------------------;




 ;-----------------------------  NEXT_LINE  --------------------------------;


 NEXT_LINE PROC
   ; this procedure will move the cursor to the next line
   ; input : none
   ; output : none
   ; uses : MAIN

   PUSH AX                   ; push AX onto the STACK
   PUSH DX                   ; push DX onto the STACK

   MOV AH, 2                 ; set output function
   MOV DL, 0DH               ; carriage return
   INT 21H                   

   MOV DL, 0AH               ; line feed
   INT 21H

   POP DX                    ; pop a value from STACK to DX
   POP AX                    ; pop a value from STACK to AX

   RET                       ; return control to the calling procedure
 NEXT_LINE ENDP





 END MAIN

    Related Post:
  1. Program that will display a string using instruction LODSB.......

  2. Program to find out whether a given quadrilateral ABCD is rectangle. Assume that all the four angles and four sides of the quadrilateral are supplie

  3. Program that prompts the user to enter a character, and prints the ASCII code of the character in hex on the next line. Repeat this process ......

  4. PROGRAM TO GET STRING FROM KEYBOARD & PRINT IT

  5. Count number of a and A from string ”Application of Microprocessor” and give appropriate message

  6. PROGRAM TO COMPARE TWO STRINGS WITH AND WITHOUT USING CMPSB INSTRUCTION USING MACRO

  7. Program which separates odd and even numbers from given 10 8-bit data stored in memory locations and store in different array and add them individuall

  8. Program to read two digits whose sum is less than 0, computes and display their sum (without using variables)

  9. An Assembly Language Program sort a given series in ascending order

  10. PROGRAM TO WRITE A PROGRAM TO COMPARE TO MEMORY LOCATION

  11. PROGRAM TO CHECK GIVEN TWO VALUE ARE EQUAL OR NOT

  12. Program to accept N names from the user and sort them in descending order

  13. PROGRAM TO CHANGE THE SIZE OF CURSOR

  14. Program to find the factorial of a number use subroutine

  15. Program to display a ?, read two capital letters, and display them on the next line in alphabetical order.

  16. Program to print characters from A to Z on the screen

  17. A Program to copy one string to another

  18. PROGRAM TO EXCHANGE THE CONTENT OF AL AND AH REGISTERS WITHOUT USING XCHG INSTRUCTION

  19. Program to get the message and print the same when enter key is pressed

  20. Procedure that prompts the user to read a decimal number in the range -32767 to +32767