Welcome screen :
Now the program You are going to create welcome screen in your operating system by assembly language. using before commands.
; boot.asm
mov ax, 0x07c0
mov ds, ax
mov ah, 0x0E ; This is function of 0x10 interrupt to print a character and move next
mov al, ‘W’ ; This is character to print
int 0x10 ; This is Interrupt to print a character
mov ah, 0x0E ; This is function of 0x10 interrupt to print a character and move next
mov al, ‘E’ ; This is character to print
int 0x10 ; This is Interrupt to print a character
mov ah, 0x0E ; This is function of 0x10 interrupt to print a character and move next
mov al, ‘L’ ; This is character to print
int 0x10 ; This is Interrupt to print a character
mov ah, 0x0E ; This is function of 0x10 interrupt to print a character and move next
mov al, ‘C’ ; This is character to print
int 0x10 ; This is Interrupt to print a character
mov ah, 0x0E ; This is function of 0x10 interrupt to print a character and move next
mov al, ‘O’ ; This is character to print
int 0x10 ; This is Interrupt to print a character
mov ah, 0x0E ; This is function of 0x10 interrupt to print a character and move next
mov al, ‘M’ ; This is character to print
int 0x10 ; This is Interrupt to print a character
mov ah, 0x0E ; This is function of 0x10 interrupt to print a character and move next
mov al, ‘E’ ; This is character to print
int 0x10 ; This is Interrupt to print a character
times 510-($-$$) db 0
db 0x55
db 0xAA
save as “welcomeboot.asm”
then command
nasm -f bin -o welcomeboot.img welcomeboot.asm
now welcomeboot.img file was created
so you will use this image file to boot as following video
The Program print WELCOME in our first screen after boot.
you can check this video
How to Create Own Operating system 