 section	.data
    msg	db	'Cebu Institute of Technology - University',10
        db  'ENROLLMENT SYSTEM',10
        db  'Programmer: Raphael Jay Escosia',10
        db  'Computer Number: 17',10
        db  'Date Created: October 20, 2023',10,10
        db  'Please enter the following data:',10
    len	equ	$ - msg

    IDN     db  'ID Number: ',9,9
    IDNlen  equ $ - IDN
    LN    db  10,'Last Name: ',9,9
    LNlen equ $ - LN
    FN        db  10,'First Name: ',9
    FNlen     equ $ - FN
    MI        db  10,'Middle Name: ', 9
    MIlen     equ $ - MI
    CO      db  10,'Course: ', 9,9
    COlen   equ $ - CO
    YL    db  10,'Year Level: ', 9
    YLlen equ $ - YL

    space       db  ' ',10
    spacelen    equ $ - space

    sum         db  9,9,9,9,'SUMMARY',10
    sumLen      equ $ - sum

    WELC        db 10,10,'Welcome to CIT-U '
    WELClen     equ $ - WELC

 

section .bss
    var1 resb 20
    var2 resb 20
    var3 resb 60
    var4 resb 60
    var5 resb 20
    var6 resb 20

 

section	.text
	global _start 

_start:                    
	mov	edx, len    
	mov	ecx, msg   
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, IDNlen    
	mov	ecx, IDN   
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, 20
	mov	ecx, var1    
	mov	ebx, 0	    
	mov	eax, 3
	int	0x80

	mov	edx, LNlen    
	mov	ecx, LN   
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, 20
	mov	ecx, var2    
	mov	ebx, 0	    
	mov	eax, 3
	int	0x80

	mov	edx, FNlen    
	mov	ecx, FN   
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, 60
	mov	ecx, var3    
	mov	ebx, 0	    
	mov	eax, 3
	int	0x80

	mov	edx, MIlen    
	mov	ecx, MI  
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, 60
	mov	ecx, var4    
	mov	ebx, 0	    
	mov	eax, 3
	int	0x80

	mov	edx, COlen    
	mov	ecx, CO  
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, 20
	mov	ecx, var5    
	mov	ebx, 0	    
	mov	eax, 3
	int	0x80

	mov	edx, YLlen    
	mov	ecx, YL  
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, 20
	mov	ecx, var6    
	mov	ebx, 0	    
	mov	eax, 3
	int	0x80

	mov	edx, spacelen    
	mov	ecx, space 
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, sumLen    
	mov	ecx, sum  
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov	edx, IDNlen    
	mov	ecx, IDN   
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov edx, 20
	mov	ecx, var1    
	mov	ebx, 1	    
	mov	eax, 4
	int	0x80

	mov	edx, LNlen    
	mov	ecx, LN   
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov edx, 20
	mov	ecx, var2    
	mov	ebx, 1	    
	mov	eax, 4
	int	0x80

	mov	edx, FNlen    
	mov	ecx, FN   
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov edx, 60
	mov	ecx, var3    
	mov	ebx, 1	    
	mov	eax, 4
	int	0x80

	mov	edx, MIlen    
	mov	ecx, MI   
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov edx, 60
	mov	ecx, var4    
	mov	ebx, 1	    
	mov	eax, 4
	int	0x80

	mov	edx, COlen    
	mov	ecx, CO  
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov edx, 20
	mov	ecx, var5    
	mov	ebx, 1	    
	mov	eax, 4
	int	0x80

	mov	edx, YLlen    
	mov	ecx, YL  
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov edx, 20
	mov	ecx, var6    
	mov	ebx, 1	    
	mov	eax, 4
	int	0x80

	mov	edx, WELClen    
	mov	ecx, WELC 
	mov	ebx, 1	    
	mov	eax, 4	  
	int	0x80

	mov edx, 4
	mov	ecx, var2    
	mov	ebx, 1	    
	mov	eax, 4
	int	0x80

	mov edx, 60
	mov	ecx, var3    
	mov	ebx, 1	    
	mov	eax, 4
	int	0x80


	mov	eax, 1
	int	0x80

created 1 year ago

Assembly Online Compiler

Write, Run & Share Assembly code online using OneCompiler's Assembly online compiler for free. It's one of the robust, feature-rich online compilers for Assembly language. Getting started with the OneCompiler's Assembly compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as Assembly and start coding.

About Assembly

Assembly language(asm) is a low-level programming language, where the language instructions will be more similar to machine code instructions.

Every assembler may have it's own assembly language designed for a specific computers or an operating system.

Assembly language requires less execution time and memory. It is more helful for direct hardware manipulation, real-time critical applications. It is used in device drivers, low-level embedded systems etc.

Syntax help

Assembly language usually consists of three sections,

Data section

To initialize variables and constants, buffer size these values doesn't change at runtime.
bss section

To declare variables
text section

_start specifies the starting of this section where the actually code is written.

Variables

There are various define directives to allocate space for variables for both initialized and uninitialized data.

1. To allocate storage space to Initialized data

Syntax

variable-name    define-directive    initial-value

Define Directive	Description	Allocated Space
DB	Define Byte	1 byte
DW	Define Word	2 bytes
DD	Define Doubleword	4 bytes
DQ	Define Quadword	8 bytes
DT	Define Ten Bytes	10 bytes

2. To allocate storage space to un-initialized data

Define Directive	Description
RESB	Reserve a Byte
RESW	Reserve a Word
RESD	Reserve a Doubleword
RESQ	Reserve a Quadword
REST	Reserve a Ten Bytes

Constants

Constants can be defined using

1. equ

To define numeric constants

CONSTANT_NAME EQU regular-exp or value

2. %assign

To define numeric constants.

%assign constant_name value

3. %define

To define numeric or string constants.

%define constant_name value

Loops

Loops are used to iterate a set of statements for a specific number of times.

mov ECX,n
L1:
;<loop body>
loop L1

where n specifies the no of times loops should iterate.

Procedures

Procedure is a sub-routine which contains set of statements. Usually procedures are written when multiple calls are required to same set of statements which increases re-usuability and modularity.

procedure_name:
   ;procedure body
   ret