🚀 go-pugleaf

 
Help!

I've got an assembly routine that is trying to read a physical sector off a 
hard disk using Bios Int 13h, AH=2....but it doesn't work.

I'm loading the registers as follows:

AX=0201 (I want to read 1 sector)
BX=0000 (offset into segment)
CX=0001 (cylinder 0, sector 1)
DX=0080 (head 0, 1st hard drive)
ES=segment pointer

INT 13;

What is wrong?  My program doesn't work...and if I load all the registers in 
DEBUG and then try a trace through the single instruction "INT 13" that 
doesn't work either.  I CAN read any sector on a floppy using the same as 
above....

Also, the carry flag is never set after the operation, as it should be on a 
failed disk read.


ANY ideas??

Thanks

____

Douglas R. Nebeker            Internet: $dougn@sasb.byu.edu