[SeaBIOS] WD Elements hang SeaBIOS at boot with "call16 with invalid stack"

[Kevin O'Connor]

On Wed, Dec 23, 2015 at 07:13:27PM +0100, Tobias Diedrich wrote:
> Wcall16 with invalid stack: eax=dfbf3e62 edx=0 func=0x000f9563 esp=dfbf3e50
> ret=0x000f2304
> 
> │.text:000F22C8 sub_F22C8       proc near               ; CODE XREF:
> sub_F2309+2Cvp
>                          ▒
> │.text:000F22C8                                         ; sub_F2309+35vj
> 

FYI, to line up "ret" with the code, one can look in
out/romlayout32flat.lds .  I prefer to run the following though:

  objdump -m i386 -M suffix -d out/rom.o | less

and then look for the function containing the desired address.

The thread associated with esp=dfbf3e50 is key though, which is why
the full log is useful.

-Kevin