33 lines
541 B
NASM
33 lines
541 B
NASM
print:
|
|
pusha
|
|
|
|
; logic being implemented here:
|
|
; while ( string[i] != 0 ) { print string[i]; i++ }
|
|
|
|
start:
|
|
mov al, [bx]
|
|
cmp al, 0 ; check if al (byte we are printing) is a 0 (null byte)
|
|
je done ; if so, jump to done
|
|
|
|
; print with BIOS help
|
|
mov ah, 0x0e
|
|
int 0x10 ; char already in al
|
|
|
|
add bx, 1 ; increment pointer
|
|
jmp start ; repeat
|
|
|
|
done:
|
|
popa
|
|
ret
|
|
|
|
print_nl:
|
|
pusha
|
|
|
|
mov ah, 0x0e
|
|
mov al, 0x0a ; newline char
|
|
int 0x10
|
|
mov al, 0x0d ; carriage return
|
|
int 0x10
|
|
|
|
popa
|
|
ret |