Function 21, subfunction 13, subsubfunction 4 - return to the initial videomode.
Returns the screen to the videomode set at system boot.
Parameters:
- eax = 21 - function number
- ebx = 13 - subfunction number
- ecx = 4 - number of the driver function
Returned value:
- eax = -1 - driver is not loaded or not initialized
- eax = 0 - success
- ebx, ecx destroyed
Remarks: