>
> > ...but it doesn't work, except for occasional "Hard disk error".
>
> You should examine what error number is returned by INT 13 call. The
> error number is stored in %ah.
The INT13 seems to work OK:
;; Load bootsector
mov ah, 2 ; Function 2 = read
mov al, 1 ; One sector
mov bx, 0x7c00 ; Buffer
mov cl, 1 ; Sectornumber
mov ch, 0 ; Cylinder 0
mov dl, 0x80 ; HD
mov dh, 0 ; Head 0
int 0x13
;; Check for error value
cmp ah, 0
jz noerror
;; Print B
mov ah, 0x2
mov dl, 0x42
int 0x21
noerror:
;; Print C
mov ah, 0x2
mov dl, 0x43
int 0x21
...gives no B. I've also tried printing out some bootsector contents, and
verified the values.
There must be some other problem, like wrong stackpointers etc.
/Peter Astrand <[EMAIL PROTECTED]>
