stringassemblybuffersector

String buffer in assembly and BIOS Inturrupts

I am trying to write a string into sector 2 of a hard-disk. It seems to be failing. Here is the code I have at the moment:

xor ax, ax
mov es, ax    
mov cx, 1     
mov dx, 0080h 
mov bx, NameString 
mov ax, 0301h 
int 13h

NameString db 'string', 0

Thank you guys!

Solution

  • The address of NameString needs to be in es:bx but you're zeroing es. Load es correctly and it will work.