[syslinux] Com32 api problem !

[H. Peter Anvin]

PERRIN Jean-Luc wrote:
> (sorry for my english if it is approximate !)
> 
> I want to access harddisk from com32 api with PXELINUX.
> I try to use int 13h Extended Read Drive Parameters (48h), it doesn't works.
> Here is my code, I have an error 1 in AH return code.
> Int 13h Read Drive Parameters (08h) work well.
> 

You need to preinitialize the size field in the params structure before 
calling the interrupt.

     *(uint16_t *)__com32.cs_bounce = sizeof disk;

I suggest also zeroing out the input buffer:

     memset(__com32.cs_bounce, 0, sizeof disk);
     *(uint16_t *)__com32.cs_bounce = sizeof disk;

	-hpa