ASSEMBLY PROGRAMMING | TASM (CS332-COMP ORG, ARC & ASSM LANG PROGRAM) 2ndyear/Tri-3rdsem

Assembly programming
assembly programs are generally written as pure text files using any text editor (Notepad etc.) as saved as. ASM files the steps are as follows.

1.CODES the program and save as .asm files, using any suitable text editor. dont use MS-Word or any word processing software.
2.ASSEMBLE program with the command Tasm <filenamw.ASM>. An object file <filename.obj> is generated.
3.If no errors are found, LINK the object file: TLINK <filename> to generate executable program/file <filename.e

REQUIREMENTS
1. Turbo Assemble (TASM.EXE)
2. LINKER (TLINK.EXE)
3.Editor
   a. Notepad
   b. C++ editor saved as a pure text file with asm extension.

Generally source file (.asm) is made up of segments containing INSTURCTION/MNEMOMICS and or DIRECTIVES. Comments must be proceded by a semi-colon (;) for each line.

Generally instructions are in the form of mnemomics such as:
*MOV
*ADD
*SUB
*RET
*INT
*XOR
*OR
*NOT
*MUL
*DIV
etc.


Arithmetic Instructions
* ADD
*MUL
*DIV
*SUB

Move Instructions
*MOV - Interrups

Logical Instructions
*OR
*AND
*NOT
*XOR

Other Instructions
*PUSH
*POP
*RET
*ROL
*ROR

Jump Instructions
*JMP-jump
*JE-jump if equal
*JNE-jump if not equal
*JZ-jump if zero
*JNZ-jump if not zero
*JAE-jump above/Equal

Sample program

PAGE             SR, 132
TITLE            DISPLAY
SSEG             SEGMENT STRACK
               DB 32 DUP ("STRACK....")
SSEG             ENDS
DSEG            SEGMENT
MESSAGE    DB "HELLO, HOW ARE YOU?", OOH.OAH
L_MESS        EQU $-MESSAGE
CSEG            SEGMENT 'CODE'
                      ASSUME OS:CSEG:SS:SSEG,DS:DSEG
MAIN    
           PROC FAR
           PUSH  DS
          PUSH O
          MOV DX,DSEG
          MOV DX,AX
          MOV BX, 0001H
          LEA DX,MESSAGE
          MOV CX,L-MESS
           MOV AH,40H
          INT 21H
MAIN ENDP
CSEG ENDS
END MAIN