Function 26, subfunction 12 - find out whether low-level PCI access is enabled.
Parameters:
- eax = 26 - function number
- ebx = 12 - subfunction number
Returned value:
- eax = 0/1 - disabled/enabled
Remarks:
- Is used by operations with PCI bus (function 62).
- The current implementation uses only low bit of ecx.
- To set the current state use subfunction 12 of function 21.