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I have used interrupt 0x13 to read the drive parameters table, but the return error code is 0x07 (i.e. drive parameter activity failed). What dose it mean, and why? I have verified my BIOS supports the interrupt 0x13 extension. Can anybody tell me?

Thank a lot.

compiler: nasm

;===START==================
mov ah, 41h     ;checking interrupt 0x13 extension
mov dl, 80h
mov bx, 55AAh
int 13h
jc      error_msg

mov ah, 48h
mov dl, 80h
mov si, buffer
int 13h
jc      error_msg

error_msg:
        .....
;==========================

I had this problem too ... but I have an ideea ... someone could tell this is stoopied but I'll try
So ... try to reset first your drive ... If it works tell me please

xor ax, ax
int 0x13

Sorry, I think it doesn't work, because I have tried this method. Every time, when I want to read the table, the hard disk will be reset, but it still fails. I have also tried to quit the current OS, re-boot the computer, and run the program. FAIL!

Could anybody tell me why?