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KowalczykBartek/print_string.asm

Created June 9, 2019 15:45
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print_string.asm
[org 0x7c00]
mov bx, HELLO_MSG
call print_string
mov bx, GOODBYE_MSG
call print_string
jmp $
; arg0: bx - pointer to string to be printed
print_string:
pusha
iteration:
mov cx, [bx]
cmp cl, 0
je end
; print character
mov al, cl
mov ah, 0x0e
int 0x10
; increment string pointer
add bx, 1
jmp iteration
end:
popa
ret
HELLO_MSG:
db 'Hello, World !', 0
GOODBYE_MSG:
db 'Goodby!', 0
times 510-($-$$) db 0
dw 0xaa55
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