Function 53, subfunction 10 - query Ethernet cable status.
Parameters:
- eax = 53 - function number
- ebx = 10 - subfunction number
Returned value:
- al = -1 - a network driver is not loaded or
does not support this function
- al = 0 - Ethernet cable is unplugged
- al = 1 - Ethernet cable is plugged
- ebx destroyed
Remarks:
- The current kernel implementation supports this function
only for RTL8139 network cards.