[syslinux] comboot+PXE stack

[Pawel Oleksik]

On Tue, Nov 23, 2004 at 06:24:26PM -0800, H. Peter Anvin wrote:
> 3. INT 22h, AX=0009h does this; this is in many ways simpler than calling 
> the PXE stack directly, because you don't have to worry about the fact that 
> different PXE versions have different calling conventions.

OK, I give up. I have no real experiences with asm. So, I want to
GET_CACHED_INFO. I have proper buffer 

BOOTPLAYER lbuf;

and structure

struct {
    PXENV_STATUS Status;
    UINT16 PacketType; /*1-discover, 2-ack, 3-cached reply*/
    UINT16 BufferSize;
    char * Buffer;      /* SEGOFF16 Buffer; ??? */
    UINT16 BufferLimit;
  } PXE_INFO = {3,sizeof(lbuf),&lbuf,0};


So now, I should call INT 22:

asm volatile("int $0x22" : "=a" (eax) 
               : "a" (0x0009), "b" (0x0071), .... );


Firstly: how to put in ES:DI the address of PXE_INFO?
Secondly: is PXE_INFO properly filled up?

best regards
p.o.