HelloWorld.asm

 include io.asm
sstack segment stack
    db 128 dup(?)
sstack ends
sdata segment
	razmer dw 4
	mas dw 4 dup(4 dup(4))
	s1 dw 0
	s2 dw 0
sdata ends
scode segment
    assume cs:scode, ds:sdata, ss:sstack
start:
    mov ax, sdata
    mov ds, ax
    mov cx, razmer 
    mov si, 0 ; строки
    mov bx, 0 ; столбцы
    loop l1    
    l1:
        mov ax, mas[si][bx]
	add s1, ax 
      	inc si 
        inc bx
    mov ax, razmer
    dec ax
    mov si, 0 ; строки
    mov bx, ax ; столбцы
    mov cx, razmer
    loop l2
    l2:
        mov ax, mas[si][bx]
	add s1, ax 
      	inc si 
        dec bx
    outword s1
    newline
    outword s2
    newline
    mov si, 0 ; строки
    mov bx, 0 ; столбцы
    mov cx, razmer
    mov dx, 0    
    cmp razmer, dx
    jg l5
    l5:
	loop l4 
	l4:
            mov ax, mas[si][bx]
	    outword ax
	    outch ' '
	    inc bx
        newline
        inc si 
        inc dx
        mov cx, razmer
        cmp razmer, dx
        jg l5
        newline
finish
scode ends
end start

created 1 year ago

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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